PRODUCT SPECIFICATION
Z89223/273/323/373
16-BIT DIGITAL SIGNAL PROCESSORS
WITH A/D CONVERTER
FEATURES
Device
Package
Z89223
Z89273
Z89323
Z89373
44-PLCC, 44-PQFP
44-PLCC
64-TQFP, 68-PLCC, 80-PQFP
64-TQFP, 68-PLCC, 80-PQFP
ROM
(Kwords)
Operating Range
OTP
(Kwords)
8
8
8
8
Data RAM
(Words)
MIPS
512
512
512
512
20
20
20
20
On-Chip Peripherals
•
5V ±10%
•
4-Channel, 8-Bit Half-Flash A/D Converter
•
0°C to 70°C Standard Temperature
–40°C to +85°C Extended Temperature
•
Serial Peripheral Interface (SPI)
•
Three General-Purpose Counter/Timers
– Two Pulse Width Modulators (PWM)
– Two Watch-Dog Timers (WDT)
DSP Core
•
16-Bit Fixed Point DSP, 24-Bit ALU and Accumulator
•
Single-Cycle Multiply and ALU Operations
•
Up to 40 Bits of I/O
•
Six-Level Hardware Stack
•
PLL System Clock
•
Six Data RAM Pointers and Sixteen Program Memory
Pointers
•
Three Vectored Interrupts Servicing Eight Sources
•
Low Power Clock Modes with Wake-up Options
•
RISC Processor with 30 Instruction Types
GENERAL DESCRIPTION
The Z893x3 products are high-performance Digital Signal
Processors (DSP) with a modified Harvard architecture featuring separate program and dual data memory banks. The
design is optimized for processing power with a minimum
of silicon area.
The Z893x3 16/24-Bit architecture accommodates advanced signal processing algorithms. The operating performance and efficient architecture provide deterministic instruction execution. Compression, filtering, frequency
detection, audio, voice detection, speech synthesis, and other vital algorithms can all be implemented.
DS000202-DSP0599
Six data RAM pointers provide circular buffer capabilities
and simultaneous dual operand fetching. Three vectored interrupts are complemented by a six-level stack.
By integrating a high-speed 4-channel, 8-bit A/D, SPI, three
Counter/Timers with PWM and WDT support, and up to 40
bits of I/O, the Z893x3 family provides a compact low-cost
system solution.
To support a wide variety of development requirements, the
Z893x3 DSP product family features the cost-effective
Z89223/323 with 8 KWords of ROM. The Z89273/373, an
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16-Bit Digital Signal Processors with A/D Converter
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GENERAL DESCRIPTION (Continued)
OTP version of the Z89223/323, is ideal for prototypes and
early production builds.
Throughout this specification, references to the Z893x3 device apply equally to the Z89223/273/323/373, unless otherwise specified.
Notes: All signals with an overline are active Low. For
example, in RD/WR, RD is active High and WR is
active Low. For I/O ports, P1.3 denotes Port1 bit 3. Pins
called NC are “No Connection”—they do not connect
any power, grounds, or signals.
Power connections follow conventional descriptions:
16
Program
Control
Unit
HALT
RESET
CLKI
CLKO
16
X
Phase
Locked
Loop
VCC
VDD
Ground
GND
VSS
Data RAM1
256x16
D0:1–3:1
Port 0
8
DADDR1
Power
P2:0
16
Y
16 MSB
16-Bit
Peripheral
Interface
P1:1
P2:1
8
16
16
8-Bit
A/D
P
8-Bit I/O
16 MSB
Shifter
VDD
VSS
16
24
AVCC
AGND
MUX
24
16-Bit Counter
Timer
16-Bit Counter
Timer, PWM
24
Accumulator
24
P1.0 or INT2
P1.1 or CLKOUT
P1.2 or SDI
P1.3 or SDO
P1.4 or SS
P1.5 or SCLK
P1.6 or UI0
P1.7 or UI1
Port 2
24
ALU
VAHI
AN0
AN1
AN2
AN3
VALO
Port 1
Stack
Multiplier
24
EA2–EA0
ED15–ED0
DS
WAIT
RD/WR
P0:1
DDATA
Bank
Switch
16
Device
Addr
Gen
Unit1
P1:0
8
16
LPF
P0:0
Addr
Gen
Unit0
16
Circuit
DDATA1
16
8
DADDR0
DDATA0
Data RAM0
256x16
D0:0–3:0
PDATA
PADDR
Program
ROM/OTP
8192x16
Connection
8-Bit I/O
16-Bit Counter
Timer, PWM
16 MSB
P2.0 or INT0
P2.1 or INT1
P2.2 or TMO0
P2.3 or TMO1
P2.4 or WAIT
P2.5 or UI2
P2.6 or TMO2
P2.7
SPI
4 Inputs
4 Outputs
P3.7–P3.4
P3.3–P3.0
Figure 1. Z892X3/3x3 Functional Block Diagram
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Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
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External Bus and External Registers. The following is
made to clarify naming conventions used in this specification. The external bus and external registers are external to
the DSP core, and are used to access internal and external
peripherals.
Z893x3
DSP
Core
ÒExternal BusÓ
External Register
External Register
External Register
External Register
Internal
Peripheral
Internal
Peripheral
External
Peripheral
External
Peripheral
Figure 2. “External” Bus
DS000202-DSP0599
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PIN FUNCTIONS
EA2–EA0. External Address Bus (output, latched). These
VAHI. Analog High Reference Voltage (input). This pin
pins provide the External Register Address. This address
bus is driven during both internal and external accesses. One
of up to seven user-defined external registers is selected by
the processor for reads or writes. EXT7 is always reserved
for use by the processor.
provides the reference for the full scale voltage of the analog
input signals.
ED15–ED0. External Data Bus (input/output). These pins
are the data bus for the user-defined external registers, and
are shared by Port0. These pins are normally tristated, except when these registers are specified as destination registers in a write instruction to an external peripheral, or when
Port0 is enabled for output. This bus uses the control signals
RD/WR, DS, and WAIT, and address pins EA2–EA0.
DS. Data Strobe (output). This pin provides the data strobe
signal for the ED Bus. DS is active for transfers to/from external peripherals only.
RD/WR. Read/Write Select (output). This pin controls the
data direction signal for the External Data Bus. Data is available from the processor on ED15–ED0 when this signal and
DS are both Low.
WAIT. Wait State (input). This pin is sampled at the rising
edge of the clock with appropriate setup and hold times. A
single wait-state can be generated internally by setting the
appropriate bits in the wait state register. The user must
drive this line if multiple wait states are required. This pin
is shared with Port2.
CLKI. Clock (input). This pin is the clock circuit input. It
can be driven by a signal or connected to a 32 KHz crystal.
CLKO. Clock (output). This pin is the clock circuit output.
It is used for operation with a 32 KHz crystal and the PLL
to generate the system clock.
HALT. Halt State (input). This pin stops program execution.
The processor continuously executes NOPs and the program counter remains constant while this pin is held Low.
This pin offers an internal pull-up.
RESET. Reset (input). This pin resets the processor. It push-
VALO. Analog Low Reference Voltage (input). This pin
provides the reference for the zero voltage of the analog input signals.
AVCC–AGND. Filtered Analog Power and Ground must be
provided on separate pins to reduce digital noise in the analog circuits.
Multifunction Pins. The Z89223/273/323/373 DSP fami-
ly offers a user-configurable I/O structure, which means
that most of the I/O pins offer dual functions. The function,
direction (input or output), and for output, the characteristics (push-pull or open drain) are all under user-control, by
programming the configuration registers appropriately as
described in the I/O Ports section. The following share I/O
Port pins:
INT0–INT2. External Interrupts (input, edge-triggered).
These pins provide three of the eight interrupt sources to
the Interrupt Controller. Each is programmable to be risingedge or falling-edge triggered. The other five interrupt
sources are from the on-chip peripherals.
CLKOUT. System Clock (output). This pin provides access
to the internal processor clock.
SDI. Serial Data In (input). This pin is the SPI serial data
input.
SDO. Serial Data Out (output). This pin is the SPI serial data
output.
SS. Slave Select (input). This pin is used in SPI Slave Mode
only. SS advises the SPI that it is the target of a serial transfer
from an external Master.
SCLK. SPI Clock (output/input). This pin is an output in
Master mode and an input in Slave mode.
UI0, UI1. User inputs (input). These general-purpose input
pins are directly tested by the conditional branch instructions. They can also be read as bits in the status register.
These are asynchronous input signals that require no special
clock synchronization. Counter/Timer0 and
Counter/Timer1 may use either of these pins as input.
es the contents of the Program Counter (PC) onto the stack
and then fetches a new PC value from program memory address 0FFCH after the RESET signal is released. The Status
register is set to all zeros. At power-up RAM and other registers are undefined, however, they are left unchanged with
subsequent resets. RESET can be asserted asynchronously.
Counter/Timer 2.
AN0–AN3. Analog Inputs (input). These are the analog input pins. The analog input signal should be between VALO
and VAHI for accurate conversions.
TMO0/UO0. Counter/Timer Output or User Output 0 (output). Counter/Timer 0 and Counter/Timer 1 can be programmed to provide output on this pin. When User Outputs
are enabled, and the Counter/Timer is disabled, this pin pro-
vides the complement of Status Register bit 5.
4
UI2. User Input (input). This pin is the input to
DS000202-DSP0599
ZiLOG
Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
TMO1/UO1. Counter/Timer Output or User Output 1 (out-
put). Counter/Timer 0 and Counter/Timer 1 can be programmed to provide output on this pin. When User Outputs
are enabled, and the Counter/Timer is disabled, this pin provides the complement of Status Register bit 6.
TMO2. Counter/Timer 2 Output (output). This pin is the
output of Counter/Timer 2
P0.15–P0.0. Port0 (input/output). This is a 16-bit user I/O
Note: These pins are not bonded out on the 44-pin packages.
P2.7–P2.0. Port2 (input/output). These pins are Port2 inputs or outputs when not configured as peripheral interfaces. The following seven pin functions preempt use of
P2.6–P2.0 when enabled. INT0, INT1, TMO0/UO0,
TMO1/UO1, WAIT, UI2, TMO2. P2.7 does not include a
dual function.
port. Bits can be configured as input or output or globally
as open-drain output. When enabled, Port0 uses the 16 data
lines of the ED bus. The function of these pins can be dynamically changed by writing to the Port0 configuration
registers. The High byte can also be configured to Port1 as
described in the I/O Port section.
The following port pins are available only on the 80-pin
package:
P1.7–P1.0. Port1 (input/output). These pins are Port1 in-
P3.7–P3.4. Port3 (output). These pins are Port3 outputs.
puts or outputs when not configured for use as special purpose peripheral interface. The following eight pin functions
preempt use of these pins when enabled. INT2, CLKOUT,
SDI, SDO, SS, SCLK, UI0, UI1.
DS000202-DSP0599
Note: P2.7–P2.5 are not bonded out on the 44-pin packages.
P3.3–P3.0. Port3 (input). These pins are Port3 inputs.
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16-Bit Digital Signal Processors with A/D Converter
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ED15/P0.15
VSS
ED14/P0.14
ED13/P0.13
ED12/P0.12
P2.0/INT0
VSS
ED2/P0.2
ED1/P0.1
ED0/P0.0
VDD
PIN CONFIGURATIONS
6
4
7
8
9
10
11
12
13
14
15
16
17
42
1
44-Pin
PLCC
18
20
22
24
26
40
39
38
37
36
35
34
33
32
31
30
29
28
RESET
LPF
P2.2/TMO0/UO0
CLKO
CLKI
P2.4/WAIT
DS
P2.3/TMO1/UO1
EA2
EA1
EA0
VAHI
VALO
AGND
AN0
AN1
AN2
AN3
P2.1/INT1
AVCC
VDD
RD/WR
ED3/P0.3
ED4/P0.4
VSS
ED5/P0.5
ED6/P0.6
ED7/P0.7
ED8/P0.8
ED9/P0.9
VSS
ED10/P0.10
ED11/P0.11
Figure 3. 44-Pin PLCC Z89223/273 Pin Configuration
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Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
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Table 1. 44-Pin PLCC Z89223/273 Pin Description
No Symbol
Function
Direction
No Symbol
Function
Direction
1
P2.0/INT0
Port 2.0/Interrupt 0
Input/Output
23 AN2
A/D Input 2
Input
2
ED12/P0.12
External Data Bus/Port0
Input/Output
24 AN3
A/D Input 3
Input
3
ED13/P0.13
External Data Bus/Port0
Input/Output
25 P2.1/INT1
Port 2.1/Interrupt 1
Input/Output
Input/Output
26 AVCC
Analog Power
27 VDD
Power Supply
Input/Output
28 RD/WR
R/W External Bus
Output
External Data Bus/Port0
Input/Output
29 EA0
Ext Address 0
Output
External Data Bus/Port0
Input/Output
30 EA1
Ext Address 1
Output
31 EA2
Ext Address 2
Output
4
ED14/P0.14
External Data Bus/Port0
5
VSS
Ground
6
ED15/P0.15
External Data Bus/Port0
7
ED3/P0.3
8
ED4/P0.4
9
VSS
Ground
10 ED5/P0.5
External Data Bus/Port0
Input/Output
32 P2.3/TMO1
Port 2.3/Timer Output 1
Input/Output
11 ED6/P0.6
External Data Bus/Port0
Input/Output
33 DS
Ext Data Strobe
Output
12 ED7/P0.7
External Data Bus/Port0
Input/Output
34 P2.4/WAIT
Port 2.4/Wait for ED
Input/Output
13 ED8/P0.8
External Data Bus/Port0
Input/Output
35 CLKI
Clock/Crystal In
Input
14 ED9/P0.9
External Data Bus/Port0
Input/Output
15 VSS
Ground
16 ED10/P0.10
External Data Bus/Port0
Input/Output
36 CLKO
Clock/Crystal Out
Output
37 P2.2/TMO0
Port 2.2/Timer Output 0
Input/Output
38 LPF
PLL Low Pass Filter
Input
Input
17 ED11/P0.11
External Data Bus/Port0
Input/Output
39 RESET
Reset
18 VAHI
Analog High Ref. Voltage
Input
40 VDD
Power
19 VALO
Analog Low Ref. Voltage
Input
41 ED0/P0.0
External Data Bus/Port0
Input/Output
20 AGND
Analog Ground
42 ED1/P0.1
External Data Bus/Port0
Input/Output
21 AN0
A/D Input 0
Input
43 ED2/P0.2
External Data Bus/Port0
Input/Output
22 AN1
A/D Input 1
Input
44 VSS
Ground
DS000202-DSP0599
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16-Bit Digital Signal Processors with A/D Converter
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ED15/P0.15
VSS
ED14/P/P0.14
ED13/P0.13
ED12/P0.12
P2.0/INT0
VSS
ED2/P0.2
ED1/P0.1
ED0/P0.0
VDD
PIN CONFIGURATIONS (Continued)
1
44 43 42 41 40 39 38 37 36 35 34
33
3
31
5
7
9
11
44-Pin
PQFP
29
27
25
23
12 13 14 15 16 17 18 19 20 21 22
RESET
LPF
P2.2/TMO0/UO0
CLKO
CLKI
P2.4/WAIT
DS
P2.3/TMO1/UO1
EA2
EA1
EA0
VAHI
VALO
AGND
AN0
AN1
AN2
AN3
P2.1/INT1
AVCC
VDD
RD/WR
ED3/P0.3
ED4/P0.4
VSS
ED5/P0.5
ED6/P0.6
ED7/P0.7
ED8/P0.8
ED9/P0.9
VSS
ED10/P0.10
ED11/P0.11
Figure 4. 44-Pin PQFP Z89223/273 Pin Configuration
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Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
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Table 2. 44-Pin PQFP Z89223/273 Pin Description
No
Symbol
Function
Direction
No
Symbol
Function
Direction
1
ED3/P0.3
External Data Bus/Port0
Input/Output
23
EA0
Ext Address 0
Output
2
ED4/P0.4
External Data Bus/Port0
Input/Output
3
VSS
Ground
4
ED5/P0.5
External Data Bus/Port0
5
ED6/P0.6
External Data Bus/Port0
6
ED7/P0.7
7
ED8/P0.8
8
9
24
EA1
Ext Address 1
Output
25
EA2
Ext Address 2
Output
Input/Output
26
P2.3/TMO1
Port 2.3/Timer Output 1
Input/Output
Input/Output
27
DS
Ext Data Strobe
Output
External Data Bus/Port0
Input/Output
28
P2.4/WAIT
Port 2.4/Wait for ED
Input/Output
External Data Bus/Port0
Input/Output
29
CLKI
Clock/Crystal In
Input
ED9/P0.9
External Data Bus/Port0
Input/Output
VSS
Ground
10
ED10/P0.10
External Data Bus/Port0
11
ED11/P0.11
External Data Bus/Port0
Input/Output
12
VAHI
Analog High Ref. Voltage
Input
13
VALO
Analog Low Ref. Voltage
Input
35
14
AGND
Analog Ground
36
ED1/P0.1
External Data Bus/Port0
Input/Output
15
AN0
A/D Input 0
Input
37
ED2/P0.2
External Data Bus/Port0
Input/Output
16
AN1
A/D Input 1
Input
38
VSS
Ground
17
AN2
A/D Input 2
Input
39
P2.0/INT0
Port 2.0/Interrupt 0
Input/Output
18
AN3
A/D Input 3
Input
40
ED12/P0.12
External Data Bus/Port0
Input/Output
19
P2.1/INT1
Port 2.1/Interrupt 1
Input/Output
41
ED13/P0.13
External Data Bus/Port0
Input/Output
20
AVCC
Analog Power
42
ED14/P0.14
External Data Bus/Port0
Input/Output
21
VDD
Power
43
VSS
Ground
22
RD/WR
R/W Exteral Output Bus
44
ED15/P0.15
External Data Bus/Port0
DS000202-DSP0599
Input/Output
30
CLKO
Clock/Crystal Out
Output
31
P2.2/TMO0
Port 2.2/Timer Output 0
Input/Output
32
LPF
PLL Low Pass Filter
Input
33
RESET
Reset
Input
34
VDD
Power Supply
ED0/P0.0
External Data Bus/Port0
Input/Output
Input/Output
9
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16-Bit Digital Signal Processors with A/D Converter
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48
VDD
VSS
ED0/P0.0
ED1/P0.1
ED2/P0.2
P1.0/INT2
VSS
P1.1/CLKOUT
P1.2/SDI
P2.0/INT0
ED12/P0.12
ED13/P0.13
VDD
ED14/P0.14
VSS
ED15/P0.15
RESET
LPF
P2.5/UI2
P2.2/TMO0/UO0
P2.6/TMO2
CLKO
CLKI
P2.4/ WAIT
DS
P2.3/TMO1/UO1
VDD
EA2
EA1
EA0
HALT
VSS
PIN CONFIGURATIONS (Continued)
45
40
35
49
33
32
30
55
64-Pin
TQFP
25
60
20
64
17
5
10
16
ED3/P0.3
ED4/P0.4
VSS
VDD
ED5/P0.5
P1.3/SDO
ED6/P0.6
P1.4/SS
ED7/P0.7
P1.5/SCLK
P2.7
ED8/P0.8
ED9/P0.9
VSS
ED10/P0.10
VSS
1
RD/WR
VDD
AVCC
P2.1/INT1
VSS
AN3
AN2
AN1
AN0
AGND
P1.7/UI1
VALO
P1.6/UI0
VSS
VAHI
ED11/P0.11
Figure 5. 64-Pin TQFP Z89323/373 Pin Configuration
10
DS000202-DSP0599
Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
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Table 3. 64-Pin TQFP Z89223/273 Pin Description
No Symbol
Function
Direction
No Symbol
Function
Direction
1
ED3/P0.3
External Data Bus/Port0
Input/Output
33 HALT
Halt Execution
Input
2
ED4/P0.4
External Data Bus/Port0
Input/Output
34 EA0
Ext Address 0
Output
3
VSS
Ground
35 EA1
Ext Address 1
Output
4
VDD
Power Supply
36 EA2
Ext Address 2
Output
5
ED5/P0.5
External Data Bus/Port0
Input/Output
37 VDD
Power Supply
6
P1.3/SDO
Port 1.3/Serial Output
Input/Output
38 P2.3/TMO1
Port2.3/Timer Output 1
Input/Output
7
ED6/P0.6
External Data Bus/Port0
Input/Output
39 DS
Ext Data Strobe
Output
8
P1.4/SS
Port 1.4/Slave Select
Input/Output
40 P2.4/WAIT
Port 2.4/Wait for ED
Input/Output
9
ED7/P0.7
External Data Bus/Port0
Input/Output
41 CLKI
Clock/Crystal In
Input
10 P1.5/SCLK
Port 1.5/Serial Clock
Input/Output
42 CLKO
Clock/Crystal Out
Output
11 P2.7
Port 2.7
Input/Output
43 P2.6/TMO2
Port 2.6/Timer Output 2
Input/Output
12 ED8/P0.8
External Data Bus/Port0
Input/Output
44 P2.2/TMO0
Port 2.2/Timer Output 0
Input/Output
13 ED9/P0.9
External Data Bus/Port0
Input/Output
45 P2.5/UI2
Port 2.5/User Input 2
Input/Output
14 VSS
Ground
46 LPF
PLL Low Pass Filter
Input
Input
15 ED10/P0.10
External Data Bus/Port0
16 VSS
Ground
17 ED11/P0.11
External Data Bus/Port0
18 VAHI
Analog High Ref. Voltage
19 VSS
Ground
47 RESET
Reset
48 VSS
Ground
Input/Output
49 VDD
Power Supply
Input
50 VSS
Ground
51 ED0/P0.0
External Data Bus/Port0
Input/Output
Input/Output
20 P1.6/UI0
Port 1.6/User Input 0
Input/Output
52 ED1/P0.1
External Data Bus/Port0
Input/Output
21 VALO
Analog Low Ref. Voltage
Input
53 ED2/P0.2
External Data Bus/Port0
Input/Output
22 P1.7/UI1
Port 1.7/User Input 1
Input/Output
54 P1.0/INT2
Port 1.0/Interrupt 2
Input/Output
23 AGND
Analog Ground
55 VSS
Ground
24 AN0
A/D Input 0
Input
56 P1.1/CLKOUT Port 1.1/Clock Output
Input/Output
25 AN1
A/D Input 1
Input
57 P1.2/SDI
Port 1.2/Serial Input
Input/Output
26 AN2
A/D Input 2
Input
58 P2.0/INT0
Port 2.0/Interrupt 0
Input/Output
27 AN3
A/D Input 3
Input
28 VSS
Ground
29 P2.1/INT1
Port 2.1/Interrupt 1
30 AVCC
Analog Power
31 VDD
Power Supply
32 RD/WR
R/W External Bus
DS000202-DSP0599
Input/Output
Output
59 ED12/P0.12
External Data Bus/Port0
Input/Output
60 ED13/P0.13
External Data Bus/Port0
Input/Output
61 VDD
Power Supply
62 ED14/P0.14
External Data Bus/Port0
63 VSS
Ground
64 ED15/P0.15
External Data Bus/Port0
Input/Output
Input/Output
11
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NC
ED15/P0.15
VSS
ED14/P0.14
VDD
ED13/P0.13
ED12/P0.12
P2.0/INT0
P1.2/SDI
P1.1/CLKOUT
VSS
P1.0/INT2
ED2/P0.2
ED1/P0.1
ED0/P0.0
VSS
VDD
PIN CONFIGURATIONS (Continued)
9
1
10
61
60
RESET
LPF
P2.5/UI2
P2.2/TMO0/UO0
P2.6/TMO2
CLKO
CLKI
P2.4/WAIT
DS
P2.3/TMO1/UO1
VDD
68-Pin
PLCC
26
27
VSS
44
43
NC
EA2
EA1
EA0
HALT
ED11/P0.11
VDD
VAHI
VSS
P1.6/UI0
VALO
P1.7/UI1
AGND
AN0
AN1
AN2
AN3
VSS
P2.1/INT1
AVCC
VDD
RD/WR
NC
ED3/P0.3
ED4/P0.4
VSS
VDD
ED5/P0.5
P1.3/SDO
ED6/P0.6
P1.4/SS
ED7/P0.7
P1.5/SCLK
P2.7
ED8/P0.8
ED9/P0.9
VSS
ED10/P0.10
VSS
Figure 6. 68-Pin PLCC Z89323/373 Pin Configuration
12
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Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
Table 4. 68-Pin PLCC Z89323/373 Pin Description
No Symbol
Function
Direction
No Symbol
Function
Direction
1
P1.2/SDI
Port 1.2/Serial Input
Input/Output
35 AN0
A/D Input 0
Input
2
P2.0/INT0
Port 2.0/Interrupt 0
Input/Output
36 AN1
A/D Input 1
Input
3
ED12/P0.12
External Data Bus/Port0
Input/Output
37 AN2
A/D Input 2
Input
4
ED13/P0.13
External Data Bus/Port0
Input/Output
38 AN3
A/D Input 3
Input
5
VDD
Power Supply
39 VSS
Ground
6
ED14/P0.14
External Data Bus/Port0
7
VSS
Ground
8
ED15/P0.15
External Data Bus/Port0
9
NC
No Connection
10 NC
No Connection
11 ED3/P0.3
External Data Bus/Port0
Input/Output
12 ED4/P0.4
External Data Bus/Port0
Input/Output
46 EA1
Ext Address 1
Output
13 VSS
Ground
47 EA2
Ext Address 2
Output
14 VDD
Power Supply
48 NC
No Connection
15 ED5/P0.5
External Data Bus/Port0
Input/Output
49 VDD
Power Supply
16 P1.3/SDO
Port 1.3/Serial Output
Input/Output
50 P2.3/TMO1
Port2.3/Timer Output 1
Input/Output
Input/Output
Input/Output
40 P2.1/INT1
Port 2.1/Interrupt 1
41 AVCC
Analog Power
Input/Output
42 VDD
Power Supply
43 RD/WR
R/W External Bus
Output
44 HALT
Halt Execution
Input
45 EA0
Ext Address 0
Output
17 ED6/P0.6
External Data Bus/Port0
Input/Output
51 DS
Ext Data Strobe
Output
18 P1.4/SS
Port 1.4/Slave Select
Input/Output
52 P2.4/WAIT
Port 2.4/Wait for ED
Input/Output
19 ED7/P0.7
External Data Bus/Port0
Input/Output
53 CLKI
Clock/Crystal In
Input
20 P1.5/SCLK
Port 1.5/Serial Clock
Input/Output
54 CLKO
Clock/Crystal Out
Output
21 P2.7
Port 2.7
Input/Output
55 P2.6/TMO2
Port 2.6/Timer Output 2
Input/Output
22 ED8/P0.8
External Data Bus/Port0
Input/Output
56 P2.2/TMO0
Port 2.2/Timer Output 0
Input/Output
23 ED9/P0.9
External Data Bus/Port0
Input/Output
24 VSS
Ground
57 P2.5/UI2
Port 2.5/User Input 2
Input/Output
58 LPF
PLL Low Pass Filter
Input
Input
59 RESET
Reset
60 VSS
Ground
61 VDD
Power Supply
Power Supply
62 VSS
Ground
29 VAHI
Analog High Ref. Voltage Input
63 ED0/P0.0
External Data Bus/Port0
Input/Output
30 VSS
Ground
64 ED1/P0.1
External Data Bus/Port0
Input/Output
25 ED10/P0.10
External Data Bus/Port0
26 VSS
Ground
27 ED11/P0.11
External Data Bus/Port0
28 VDD
Input/Output
Input/Output
31 P1.6/UI0
Port 1.6/User Input 0
Input/Output
65 ED2/P0.2
External Data Bus/Port0
Input/Output
32 VALO
Analog Low Ref. Voltage
Input
66 P1.0/INT2
Port 1.0/Interrupt 2
Input/Output
33 P1.7/UI1
Port 1.7/User Input 1
Input/Output
67 VSS
Ground
34 AGND
Analog Ground
68 P1.1/CLKOUT
Port 1.1/Clock Output
DS000202-DSP0599
Input/Output
13
Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
64
VSS
P30
ED0/P0.0
ED1/P0.1
ED2/P0.2
P1.0/INT2
VSS
P1.1/CLKOUT
P1.2/SDI
P2.0/INT0
ED12/P0.12
ED13/P0.13
VDD
60
55
NC
EA2
EA1
P3.6
EA0
HALT
NC
P3.5
RD/WR
RESET
P3.7
LPF
P2.5/UI2
P2.2/TMO0/UO0
P2.6/TMO2
CLKO
CLKI
P2.4/WAIT
DS
P2.3/TMO1/UO1
VDD
VSS
NC
VDD
PIN CONFIGURATIONS (Continued)
50
45
41
40
65
AVCC
P2.1/INT1
VSS
70
35
80-Pin
PQFP
75
30
ED14/P0.14
VSS
AN3
AN2
AN1
AN0
AGND
P1.7/UI1
VALO
P1.6/UI0
VSS
VAHI
VDD
25
80
20
ED11/P0.11
24
NC
P3.4
15
P3.3
ED10/P0.10
VSS
10
ED5/P0.5
P1.3/SDO
ED6/P0.6
P14/SS
ED7/P0.7
P1.5/SCLK
P2.7
ED8/P0.8
ED9/P0.9
VSS
5
NC
ED15/P0.15
NC
NC
ED3/P0.3
P3.2
ED4/P0.4
VSS
1
VDD
P3.1
VDD
Figure 7. 80-Pin PQFP Z89323/373 Pin Configuration
14
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Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
Table 5. 80-Pin PQFP Z89323/373 Pin Description
No Symbol
Function
Direction
1
NC
No Connection
2
ED15/P0.15
External Data Bus/Port0
3
NC
No Connection
4
NC
No Connection
5
ED3/P0.3
External Data Bus/Port0
Input/Output
6
P3.2
Port 3.2
7
ED4/P0.4
External Data Bus/Port0
8
VSS
9
VDD
Input/Output
No Symbol
Function
Direction
41 RD/WR
R/W External Bus
Output
Output
42 P3.5
Port 3.5
43 NC
No Connection
44 HALT
Halt Execution
Input
45 EA0
Ext Address 0
Output
Input
46 P3.6
Port 3.6
Output
Input/Output
47 EA1
Ext Address 1
Output
Ground
48 EA2
Ext Address 2
Output
Power Supply
49 NC
No Connection
10 ED5/P0.5
External Data Bus/Port0
Input/Output
50 VDD
Power Supply
11 P1.3/SDO
Port 1.3/Serial Output
Input/Output
51 P2.3/TMO1
Port 2.3/Timer Output 1
Input/Output
12 ED6/P0.6
External Data Bus/Port0
Input/Output
52 DS
Ext Data Strobe
Output
13 P1.4/SS
Port 1.4/Slave Select
Input/Output
53 P2.4/WAIT
Port 2.4/Wait for ED
Input/Output
14 ED7/P0.7
External Data Bus/Port0
Input/Output
54 CLKI
Clock/Crystal In
Input
15 P1.5/SCLK
Port 1.5/Serial Clock
Input/Output
55 CLKO
Clock/Crystal Out
Output
16 P2.7
Port 2 7
Input/Output
56 P2.6/TMO2
Port 2.6/Timer Output 2
Input/Output
17 ED8/P0.8
External Data Bus/Port0
Input/Output
57 P2.2/TMO0
Port 2.2/Timer Output 0
Input/Output
18 ED9/P0.9
External Data Bus/Port0
Input/Output
19 VSS
Ground
20 P3.3
Port 3 3
Input
21 ED10/P0.10
External Data Bus/Port0
Input/Output
22 VSS
Ground
23 NC
No Connection
63 VDD
Power Supply
24 P3.4
Port 3.4
Output
64 NC
No Connection
25 ED11/P0.11
External Data Bus/Port0
Input/Output
65 VSS
Ground
26 VDD
Power Supply
66 P3.0
Port 3.0
Input
27 VAHI
Analog High Ref. Voltage Input
67 ED0/P0.0
External Data Bus/Port0
Input/Output
28 VSS
Ground
68 ED1/P0.1
External Data Bus/Port0
Input/Output
58 P2.5/UI2
Port 2.5/User Input 2
Input/Output
59 LPF
PLL Low Pass Filter
Input
60 P3.7
Port 3.7
Output
61 RESET
Reset
Input
62 VSS
Ground
29 P1.6/UI0
Port 1 6/User Input 0
Input/Output
69 ED2/P0.2
External Data Bus/Port0
Input/Output
30 VALO
Analog Low Ref. Voltage
Input
70 P1.0/INT2
Port 1.0/Interrupt 2
Input/Output
31 P1.7/UI1
Port 1 7/User Input 1
Input/Output
71 VSS
Ground
32 AGND
Analog Ground
72 P1.1/CLKOUT
Port 1.1/Clock Output
Input/Output
33 AN0
A/D Input 0
Input
73 P1.2/SDI
Port 1.2/Serial Input
Input/Output
34 AN1
A/D Input 1
Input
74 P2.0/INT0
Port 2.0/Interrupt 0
Input/Output
35 AN2
A/D Input 2
Input
75 ED12/P0.12
External Data Bus/Port0
Input/Output
36 AN3
A/D Input 3
Input
Input/Output
37 VSS
Ground
38 P2.1/INT1
Port 2.1/Interrupt 1
39 AVCC
40 VDD
76 ED13/P0.13
External Data Bus/Port0
77 VDD
Power Supply
78 ED14/P0.14
External Data Bus/Port0
Analog Power
79 VSS
Ground
Power Supply
80 P3.1
Port 3.1
DS000202-DSP0599
Input/Output
Input/Output
Input
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Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
ABSOLUTE MAXIMUM RATINGS
Symbol
Description
Min
Max
Units
VCC
Supply Voltage
–0.3
7.0
V
TSTG
Storage Temperature –65
150
°C
TA
Ambient Operating
Temperature
“S” device
“E” device
70
85
°C
°C
0
–40
Stresses greater than those listed under Absolute Maximum
Ratings may cause permanent damage to the device. This
rating is a stress rating only; operation of the device at any
condition above those indicated in the operational sections
of these specifications is not implied. Exposure to absolute
maximum rating conditions for extended period may affect
device reliability.
STANDARD TEST CONDITIONS
The characteristics listed below apply for standard test conditions as noted. All voltages are referenced to Ground. Positive current flows into the referenced pin.
Positive current I(+) flows in to the referenced pin.
Negative current I(Ð) flows out of the referenced pin.
2.1 KΩ
I (+)
I (–)
From Output
Under Test
30 pF
9.1 KΩ
Figure 8. Test Load Diagram
16
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Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
DC ELECTRICAL CHARACTERISTICS
Table 6. ROM Version: VDD = 5V ±10%, TA = 0°C to +70°C for “S” temperature range
TA = –40°C to +85°C for “E” temperature range, unless otherwise noted;
IDD measured with peripherals disabled
Symbol Parameter
Condition
IDD–PLL
Typical
Max
VDD = 5.0V, 20 MHz
60mA
66mA
IDD–ECD Supply Current using External Clock Direct
VDD = 5.0V, 20 MHz
55 mA
61mA
IDD–XOD Supply Current using XTAL Oscillator Direct
VDD = 5.0V, 32-kHz XTAL
250µA
275µA
IDD–DEEP Supply Current during Deep Sleep
VDD = 5.0V, 32kHz XTAL
175µA
193µA
Supply Current using PLL
VIH
Input High Level
VIL
Input Low Level
IL
Input Leakage
VOH
Output High Voltage
VOL
Output Low Voltage
IFL
Min
2.7V
0.8V
-10µA
IOH = –100 µA
VDD–0.2V
IOH = –160 µA
2.4V
10µA
IOL = 1.6 mA
0.4V
IOL = 2.0 mA
0.5V
Output Floating Leakage Current
-10µA
10µA
Table 7. OTP Version: VDD = 5V ±10%, TA = 0°C to +70°C for “S” temperature range
TA = –40°C to +85°C for “E” temperature range, unless otherwise noted;
IDD measured with peripherals disabled
Symbol Parameter
Condition
IDD–PLL
Supply Current using PLL
IDD–ECD
Supply Current using External Clock Direct
Typical
Max
VDD = 5.0V, 20 MHz
78mA
86mA
VDD = 5.0V, 20 MHz
75mA
83mA
IDD–XOD Supply Current using XTAL Oscillator Direct
VDD = 5.0V, 32-kHz XTAL
17mA
19mA
IDD–DEEP Supply Current during Deep Sleep
VDD = 5.0V, 32kHz XTAL
17mA
19mA
VIH
Input High Level
VIL
Input Low Level
IL
Input Leakage
VOH
Output High Voltage
VOL
IFL
Output Low Voltage
Output Floating Leakage Current
DS000202-DSP0599
Min
2.7V
0.8V
-10µA
IOH = –100 µA
VDD–0.2V
IOH = –160 µA
2.4V
10µA
IOL = 1.6 mA
0.4V
IOL = 2.0 mA
0.5V
-10µA
10µA
17
Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
DC ELECTRICAL CHARACTERISTICS (Continued)
60
I DD [mA]
50
40
30
20
10
0
0
5
10
15
20
25
System Clock [MHz]
Direct Clock with VCO Off
PLL Clock from 32.8KHz Crystal
Figure 9. Z89373 Typical OTP Current Consumption
18
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Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
AC ELECTRICAL CHARACTERISTICS
Table 8. VDD= 5V ±10%, TA = 0°C to +70°C for “S” Temperature Range
TA = –40°C to +85°C for “E” temperature range, unless otherwise noted
Symbol
Parameter
Clock
TCY
CPWH
CPWL
Tr
Tf
CLKI Cycle Time for user-supplied clock
CLKI Pulse Width High
CLKI Pulse Width Low
CLKI Rise Time for 20-MHz user-supplied clock
CLKI Fall Time for 20-MHz user-supplied clock
External Peripheral Bus
EASET
EA Setup Time to DS Fall
EAHOLD
EA Hold Time from DS Rise
RWSET
Read/Write Setup Time to DS Fall
RWHOLD
Read/Write Hold Time from DS Rise
RDSET
Data Read Setup Time to DS Rise
RDHOLD
Data Read Hold Time from DS Rise
WRVALID
Data Write Valid Time from DS Fall
WRHOLD
Data Write Hold Time from DS Rise
Reset
RRISE
Reset Rise Time
RWIDTH
Reset Low Pulse Width
Interrupt
IWIDTH
Interrupt Pulse Width
Halt
HWIDTH
Halt Low Pulse Width
Wait State
WLAT
Wait Latency Time from DS Fall
WDEA
Wait Deassert Setup Time to CLKOUT Rise
SPI
SDI–SCLK
Serial Data In to Serial Clock Setup Time
SCLK–SDO
Serial Clock to Serial Data Out Valid
SS–SCLK
Slave Select to Serial Clock Setup Time
SS–SDO
Slave Select to Serial Data Out Valid
SCLK–SDI
Serial Clock to Serial Data In Hold Time
DS000202-DSP0599
Min [ns]
Max [ns]
50
21
21
31250
2
2
10
4
10
0
15
0
5
2
20 TCY
2 TCY
1TCY
3 TCY
7
TBD
10
15
1/2 SCLK Period
15
10
19
Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
8-BIT ANALOG/DIGITAL CONVERTER
Table 9. AVCC–AGND = 5V ±10%
TA = 0°C to +70°C for “S” temperature range, unless otherwise noted
Parameter
Min
Integral Nonlinearity (INL)
Differential Nonlinearity (DNL)
Zero Offset Error
Full Scale Offset Error
Valid Input Signal Range
Input Capacitance
Conversion Time
Input Impedance
500kSPS
100kSPS
44kSPS
VAHI
VALO
VAHI–VALO
Typ
Max
Units
0.5
0.5
2
2
1
1
3
3
VAHI
40
LSB
LSB
LSB
LSB
V
pF
µs
VALO
2
33
3
10
48
110
VALO + 2.5
AVCC
kΩ
kΩ
kΩ
V
AGND
AVCCÐ2.5
V
2.5
AVCC
V
Reference Ladder Resistance
VAHI to VALO
Power Dissipation
5
50
kΩ
85
mW
Table 10. AVCC–AGND = 5V ±10%
TA = –40°C to +85°C for “E” temperature range, unless otherwise noted
Parameter
Integral Nonlinearity (INL)
Differential Nonlinearity (DNL)
Zero Offset Error
Full Scale Offset Error
Valid Input Signal Range
Input Capacitance
Conversion Time
Input Impedance
500kSPS
100kSPS
44kSPS
VAHI
VALO
VAHI–VALO
Reference Ladder Resistance
VAHI to VALO
Power Dissipation
20
Min
Typ
Max
Units
3
3
1
1
4
4
VAHI
40
LSB
LSB
LSB
LSB
V
pF
µs
VALO
2
33
3
10
48
110
VALO + 2.5
AVCC
kΩ
kΩ
kΩ
V
AGND
AVCCÐ2.5
V
2.5
AVCC
V
5
kΩ
85
mW
DS000202-DSP0599
Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
TIMING DIAGRAMS
TCY
CPWL
Tr
CPWH
Tf
Figure 10. Clock Timing
RD/WR
RWSET
RWHOLD
DS
EASET
EAHOLD
Valid Address Out
EA(2:0)
RDSET
RDHOLD
ED(15:0)
Data
Figure 11. Read Timing
RD/WR
DS
WLAT
WAIT
WDEA
CLKOUT
EA(2:0)
Valid Address Out
RDSET
RDHOLD
ED(15:0)
Data
Figure 12. Read Timing Using WAIT Pin
DS000202-DSP0599
21
Z89223/273/323/373
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ZiLOG
TIMING DIAGRAMS (Continued)
RD/WR
RWSET
RWHOLD
EASET
EAHOLD
DS
Valid Address Out
EA(2:0)
WRVALID
WRHOLD
ED(15:0)
Data
Figure 13. Write Timing
RWHOLD
RD/WR
RWSET
DS
WLAT
WAIT
WDEA
CLKOUT
EASET
EA(2:0)
Valid Address Out
WRVALID
ED(15:0)
WRHOLD
Data
Figure 14. Write Timing Using WAIT Pin
22
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16-Bit Digital Signal Processors with A/D Converter
ZiLOG
SS*
SS-SCLK Setup
SS-SDO Valid
SCLK*
SCLK-SDO Valid
TRI-STATE
SDO
Valid
SDI-SCLK Setup
SDI
Valid
SCLK-SDI Hold
*Notes: The polarity of SCLK and SS are programmable by the user. SS is used in Slave Mode only.
This figure illustrates data transmission on the falling edge of SCLK,
data reception on the rising edge of SCLK, with SS active Low (default).
Figure 15. SPI Timing (Master and Slave Modes)
DS000202-DSP0599
23
Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
FUNCTIONAL DESCRIPTION
Instruction Timing. Most instructions are executed in one
machine cycle. A multiplication or multiply/accumulate instruction requires a single cycle. Long immediate instructions, and Jump or Call instructions, are executed in two machine cycles. Specific instruction cycle times are described
in the Instruction Description section.
Data Bus Bank Switch. There is a switch that connects the
Multiply/Accumulate. The multiplier can perform a 16-
to the output of the 24-bit Accumulator. The other input selects either the Multiplier Unit Output or the 16-bit DDATA
bus (left-justified with zeros in the eight LSBs). The ALU
performs arithmetic, logic, and shift operations.
bit x 16-bit multiply, or multiply/accumulate, in one machine cycle using the Accumulator and/or both the X and
Y inputs. The multiplier produces a 32-bit result, however,
only the 24 most significant bits are saved for the next instruction or accumulation. For operations on very small
numbers where the least significant bits are important, the
data should first be scaled to avoid truncation errors.
X Bus to the DDATA Bus that allows both the X and Y registers to be loaded with the same operand for a one cycle
squaring operation. The switch is also used to read the X
register.
ALU. The ALU features two input ports. One is connected
DDATA
Multiplier Unit
Output
XDATA
DDATA
16
16
24
16
MUX
•X Register (16)
Y Register (16)
24
24
MULTIPLIER
ALU
P Register (24)
16 MSB
Accumulator (24)
Shift Unit
24
Multiplier Unit
Output
16 MSB
*Options:
No Shift
3 Bits Right
Figure 16. Multiplier Block Diagram
All inputs to the multiplier should be fractional two’s-complement, 16-bit binary numbers, which places them in the
range [–1 to 0.9999695]. The result is in 24 bits, so the range
is [–1 to 0.9999999].
If 8000H is loaded into both the X and Y registers, the multiplication produces an incorrect result. Positive one cannot
be represented in fractional notation, and the multiplier actually yields the result 8000H x 8000H = 8000H (–1 x –1
= –1). The user should avoid this case to prevent erroneous
results.
A shifter between the P Register and the Multiplier Unit
Output can shift the data by three bits right or no shift.
24
24
Figure 17. ALU Block Diagram
Hardware Stack. A six-level hardware stack is connected
to the DDATA bus to hold subroutine return addresses or
data. The CALL instruction pushes PC+2 onto the stack,
and the RET instruction pops the contents of the stack to
the PC.
User Inputs and Outputs. The Z893x3 features three
User Inputs, UI0, UI1, and UI2. Pins UI0 and UI1 are connected directly to status register bits S10 and S11, and can
be read, or used as a condition code in any conditional instruction. Pins UI0, UI1 and UI2 may also be used to clock
the Counter/Timers. There are two user output bits, UO0
and UO1, which share pins with the timer outputs TMO0
and TMO1 on Port2. When the User Outputs are enabled,
they are the complements of bits S5 and S6 of the Status
Register.
DS000202-DSP0599
Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
Interrupts. The Z893x3 features three user interrupt inputs
which can be programmed to be positive or negative edgetriggered. There are five interrupts generated by internal peripherals: the A/D converter, the Serial Peripheral Interface,
and the three Counter/Timers. Internally there are three priority levels. The internal signals for Interrupt service Requests are denoted ISR0, ISR1, and ISR2, with ISR0 having
the highest priority, and ISR2 the lowest. The user can program which interrupt sources are enabled, and which sources are serviced by the highest, middle, and lowest priority
service routines. An interrupt is serviced at the end of an
instruction execution. Two machine cycles are required to
enter an interrupt instruction sequence. The PC is pushed
onto the stack. The Interrupt Controller fetches the address
of the interrupt service routine from the following locations
in program memory:
Device
ISR0
ISR1
ISR2
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1FFFH
1FFEH
1FFDH
Port2. A multifunctional 8-bit port. Bits can be configured
as input or output or globally as open-drain output. Port2
also supports INT0 and INT1, all three Counter/Timer outputs, ED Bus, WAIT, and UI2.
Port3. Port3 is an 8-bit user I/O port with 4 bits of input and
4 bits of output. It is available only on the 80-pin package.
External Register Usage. T h e e x t e r n a l r e g i s t e r s
EXT0–EXT6 are accessed using the External Address Bus
EA2–EA0, the External Data Bus (ED Bus) ED15–ED0,
and control signals DS, WAIT, and RD/WR. These provide
a convenient data transfer capability with external peripherals. Data transfers can be performed in a single-cycle. An
internal wait state generator is provided to accommodate
slower external peripherals. A single wait state can be implemented through control register Bank15/EXT3. For additional wait states, the WAIT pin can be used. The WAIT
pin is monitored only during execution of a read or write
instruction to external peripherals on the ED bus.
Wait-State Generator. An internal Wait-State generator
At the end of the interrupt service routine, a RET instruction
is used to pop the stack into the PC.
The Set-Interrupt-Enable-Flag (SIEF) instruction enables
the interrupts. Interrupts are automatically disabled when
entering an interrupt service routine. Before exiting an interrupt service routine the SIEF instruction can be used to
reenable interrupts.
Registers. In addition to the internal registers for process-
ing, control, and configuration, the Z893x3 offers up to seven user-defined 16-bit external registers, EXT0–EXT6, depending on the Register Bank Select value. The external
register address space is shared by the Z893x3 internal peripherals. Selecting banks 0–4 of the EXT Register Assignment allows access to/from three to seven of these addresses
for general-purpose use.
I/O Ports. The Z893X3 DSP family features a user-config-
urable I/O structure. Most of the I/O pins include dual functions. The Counter/Timer, Serial Peripheral Interface, and
External Interrupt Enables determine whether a pin is dedicated to peripheral or I/O port use.
Port0. A 16-bit user I/O port. Bits can be configured as input or output or globally as open-drain output. When enabled, Port0 consumes the 16 data lines used by the ED bus.
Port0 function and ED bus use can be dynamically alternated by enabling and disabling Port0.
Port1. A multifunctional 8-bit port. Bits can be configured
as input or output or globally as open-drain output. Port1
also supports INT2, CLKOUT, the Serial Peripheral Interface, and User Inputs 0 and 1.
DS000202-DSP0599
is provided to accommodate slow external peripherals. A
single Wait-State can be implemented through a control
register. For additional states, a dedicated pin (WAIT) can
be held Low. The WAIT pin is monitored only during execution of a read or write instruction to external peripherals
(ED bus).
Analog to Digital Converter. The A/D Converter is a 4-
channel, 8-bit half-flash converter. Two external reference
voltages provide a scalable input range. The A/D sample
rate is determined by a prescaler connected to the system
clock. An interrupt is optionally generated at the end of a
conversion. The four input channels can be programmed to
operate on demand, continuously, or upon an event (timer
or interrupt).
Counter/Timers (C/T0 and C/T1). These C/Ts are 16-bit
with 8-bit prescalers. They also offer the option of being
used as PWM generators and include both hardware and
software Watch-Dog capabilities. Both C/Ts are identical
and can be externally or internally clocked. Either C/T can
drive TMO0 or TMO1. Either C/T can drive any of the three
interrupt service requests (ISR0, ISR1, or ISR2).
Counter/Timer (C/T2). This C/T is 16-bits, externally or
internally clocked, and can drive TMO2 and/or any of the
three interrupt service requests (ISR0, ISR1, or ISR2).
Serial Peripheral Interface (SPI). The Serial Peripheral
Interface provides a convenient means of inter-processor
and processor-peripheral communication. It offers the capability to transmit and receive simultaneously. The SPI is
designed to operate in either master or slave mode.
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MEMORY MAP
Program Memory. Programs of up to 8K words can be
masked into internal ROM (Z89323) or programmed into
OTP (Z89373). Four locations are dedicated to the vector
addresses for the three interrupt service routines
(1FFDH–1FFFH) and for the starting address following a
RESET (1FFCH). Internal ROM is mapped from 0000H to
1FFFH, and the highest location for program instructions
is 1FFBH.
Internal Data RAM. All Z893x3 family members feature
internal 512 x 16-bit data RAM organized as two banks of
256 x 16-bit words each (RAM0 and RAM1). The three addressing modes available to access the data RAM are direct
addressing, short form direct, and register indirect.
The contents of both data RAM banks can be read simultaneously and loaded into the X and Y inputs of the multiplier during a multiply instruction.
The addresses for each data RAM bank are:
0Ð255 (0000HÐ00FFH) for RAM0
In auto-increment, loop-increment, and loop-decrement indirect addressing, the pointer is automatically modified.
The data RAM pointers, which may be read or written directly, are 8-bit registers connected to the lower byte of the
internal 16-bit DDATA Bus.
Program Memory Pointers. The first 16 locations of each
data RAM bank can be used as pointers to locations in Program Memory. These pointers provide an efficient way to
address coefficients. The programmer selects a pointer location using two bits in the status register and two bits in
the operand. At any one time, there are eight usable pointers,
four per bank, and the four pointers are in consecutive locations.
Example: Dn:b, where
n = pointer number = 0, 1, 2, or 3
b = bank = 0 or 1,
thus,
256Ð511 (0100HÐ01FFH) for RAM1
Data RAM Pointers. In register indirect, each data RAM
bank is addressed by one of three data RAM address pointers:
Example: Pn:b, where
n = pointer number = 0, 1, or 2
b = bank = 0 or 1,
D0:0, D1:0, D2:0, D3:0 for RAM0
D0:1, D1:1, D2:1, D3:1 for RAM1
If S3/S4 = 01 in the status register, then
D0:0/D1:0/D2:0/D3:0 refer to register locations
4/5/6/7 in data RAM Bank 0.
thus,
P0:0, P1:0, P2:0 for RAM0
P0:1, P1:1, P2:1 for RAM1
Program Memory
Data Memory
FFFF
FFFF
FFFC
Not Used
Not Used
Or
512 words
01FF
DRAM1
0100
00FF
ISR0-ISR2 Vectors
RESET Vector
DRAM0
0000
On-Chip Memory
8 KW
1FFF-D
1FFC
1FFB
0000
On-Chip Memory
Figure 18. Memory Map
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REGISTERS
Both external and internal registers are accessed in one machine cycle. The external registers are used to access the onchip peripherals when they are enabled.
only be read by software. S9–S0 control hardware operations and can be written by software.
Table 11. Status Register Bit Functions
The internal registers of the Z893X3 are defined below:
Register
Register Definition
X
Y
P
A
Pn:b
PC
SR
EXT0
EXT1
EXT2
EXT3
EXT4
EXT5
EXT6
EXT7
Multiplier X Input, 16-bits
Multiplier Y Input, 16-bits
Multiplier Output, 24-bits
Accumulator, 24-bits
Six Data RAM Pointers, 8-bits each
Program Counter, 16-bits
Status Register, 16-bits
depends on Bank Select #, 16-bits
depends on Bank Select #, 16-bits
depends on Bank Select #, 16-bits
depends on Bank Select #, 16-bits
depends on Bank Select #, 16-bits
depends on Bank Select #, 16-bits
depends on Bank Select #, 16-bits
Interrupt Status/Bank Select, 16-bits
X and Y are two 16-bit input registers for the multiplier.
These registers can be utilized as temporary registers when
the multiplier is not being used.
P holds the result of multiplications and is read-only.
A is a 24-bit Accumulator. The output of the ALU is sent
SR Bit
Function
Read/Write
S15 (N)
S14 (OV)
S13 (Z)
S12 (C)
S11 (UI1)
S10 (UI0)
S9 (SH3)
ALU Negative
ALU Overflow
ALU Zero
Carry
User Input 1
User Input 0
MPY Output
Arithmetically Shifted
Right by Three Bits
Overflow Protection
Interrupt Enable
RO
RO
RO
RO
RO
RO
R/W
User Output 1
User Output 0
“Short Form Direct” bits
RAM Pointer Loop Size
R/W
R/W
R/W
R/W
S8 (OP)
S7 (IE)
S6 (UO1)
S5 (UO0)
S4–S3
S2–S0 (RPL)
R/W
R/W
Note: RO = read only, RW = read/write. The status register can
always be read in its entirety.
S15–S12 are set/reset by the ALU after an operation.
S11–S10 are set/reset by the user input pins.
If S9 is set and a multiply/shift option is used, the shifter
shifts the result three bits right. This feature allows the data
to be scaled and prevents overflows.
to this register. When 16-bit data is transferred into this register, it is placed into the 16 MSBs and the least significant
eight bits are set to zero. Only the upper 16 bits are transferred to the destination register when the Accumulator is
selected as a source register in transfer instructions.
If S8 is set, the hardware clamps at maximum positive or
negative values instead of overflowing.
Pn:b are the pointer registers for accessing data RAM where
S7 enables interrupts.
n = 0, 1, or 2, and b = 0 or 1. They can be directly read or
written. They point to locations in data RAM.
S6–S5 are User Outputs. The complement of the value in
modify this register requires two clock cycles.
the Status Register appears on bits 2 and 3 of Port2 if the
User Outputs are enabled by writing a 1 to Bit 15 of Bank
15–EXT3, and Counter/Timer 0 and 1 are disabled.
SR is the status register. It contains the ALU status and pro-
S4–S3 are the two MSBs in the “short form direct” mode
PC is the Program Counter. Any instruction which may
cessor control bits. The status register can always be read
in its entirety. S15–S10 are set/reset by hardware and can
of addressing.
S2–S0 define the RAM pointer loop size as indicated in Ta-
ble 12.
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REGISTERS (Continued)
Table 12. RPL Description
Dn:b refers to locations in RAM that can be used as a pointer
S2
S1
S0
Loop Size
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
256
2
4
8
16
32
64
128
to locations in program memory which is efficient for coefficient addressing. The programmer decides which location to choose from two bits in the status register and two
bits in the operand. Thus, only the lower 16 possible locations in RAM can be specified. At any one time, there are
eight usable pointers, four per bank, and the four pointers
are in consecutive locations in RAM. For example, if
S3/S4=01 in the status register, then D0:0/D1:0/D2:0/D3:0
refer to register locations 4/5/6/7 in RAM Bank 0. Note that
when the data pointers are being written to, a number is actually being loaded to Data RAM, so they can be used as a
limited method for writing to RAM.
The following are not actually registers, but are read or written in the same way as hardware registers on the chip:
Register
Register Definition
BUS
Dn:b
EXTn
D-Bus
Eight Data Pointers
External Register, 16-bit
EXTn are external registers (n = 0 to 6). These are seven
16-bit register addresses provided for mapping internal and
external peripherals into the address space of the processor.
Note that for external peripherals the actual register RAM
does not exist on the chip, but would exist as part of the external device, such as an A/D result latch. The External Address Bus, EA2–EA0, the External Data Bus, ED15–ED0,
DS, WAIT, and RD/WR are used to access external peripherals.
BUS is a read-only register which, when accessed, returns
EXT7 is used for Register Bank Select, and to program wait
states for EXT0–EXT6, and is not available for accessing
an external peripheral.
the contents of the D-Bus. BUS is used for emulation only.
N
OV
Z
C
UI1
UI0 SH3
OP
IE
S15
S14
S13
S12
S11
S10
S8
S7
S9
UO1 UO0
S6
S5
RPL
S4
S3
S2
S1
S0
Ram
Pointer
000
001
010
011
100
101
110
111
Negative
Overflow
Zero
Carry
User Input UI1,UI0
(Read Only)
MPY output arithmetically
shifted right by three bits
Loop
Size
256
2
4
8
16
32
64
128
"Short Form Direct" bits
Overflow Protection
User Output UO1, UO0
(Complemented)
Global Interrupt Enable
Figure 19. Status Register
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BANK/EXT REGISTER ASSIGNMENTS
There are 16 different Banks of EXT registers. Control of
the bank switching is done via the EXT7 register. The same
EXT7 register exists in all Banks.
Banks 0–5 support different combinations of external registers for external peripherals, and external registers for internal (on-chip) peripherals. Use the bank that offers the optimum combination of internal and external registers to
support the application. Use it as a preferred working bank
to minimize bank switching.
Banks 6–12 only decode EXT6 and EXT7. Do not use
EXT0–5 for Banks 6–12.
Banks 13–15 are control register banks. These banks are
used in the initialization routines and whenever a configuration change is required. Refer to the sections on I/O Ports
and Peripherals for details.
Table 13. EXT Register Assignments Banks 0–4
EXT0
EXT1
EXT2
EXT3
EXT4
EXT5
EXT6
EXT7
Bank0
Bank1
Bank2
Bank3
Bank4
User
User
User
SPI Data
Port0 Data
Port2–Port1 Data
A/D_Ch0 Data
Interrupt status/
Bank Select
User
User
User
User
Port0 Data
Port2–Port1 Data
A/D_Ch1 Data
Interrupt status/
Bank Select
User
User
User
User
User
Port3 Data
A/D_Ch2 Data
Interrupt status/
Bank Select
User
User
User
SPI Data
User
User
A/D_Ch3 Data
Interrupt status/
Bank Select
User
User
User
User
User
User
User
Interrupt status/
Bank Select
Table 14. EXT Register Assignments Banks 5–15
Bank5
Bank6–12
Bank13
Bank14
EXT0
EXT1
EXT2
A/D_Ch1 Data
A/D_Ch2 Data
A/D_Ch3 Data
not defined
not defined
not defined
A/D Control
C/T0 Control
C/T0 Load
C/T2 Load/Read
C/T1 Control
C/T1 Load
EXT3
EXT4
EXT5
EXT6
EXT7
SPI Data
Port0 Data
Port2–Port1 Data
A/D_Ch0 Data
Interrupt status/
Bank Select
not defined
not defined
not defined
A/D_Ch0 Data
Interrupt status/
Bank Select
DS000202-DSP0599
Bank15
Port0 Control
Port1 Ctrl/Port0 Alloc
Ports 2, 3, & C/T2
Control
C/T0 Counter
C/T1 Counter
Wait State Control
C/T0 Prescaler Ld C/T1 Prescaler Ld SPI Control
C/T0 Prescaler
C/T1 Prescaler
System Clock Control
A/D_Ch0 Data
Interrupt Polarity Interrupt Allocation
Interrupt status/
Interrupt status/
Interrupt status/
Bank Select
Bank Select
Bank Select
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BANK/EXT REGISTER ASSIGNMENTS (Continued)
Interrupt Status/Bank Select RegisterÑEXT7
Note: Write “1” to a particular status bit to clear that bit. Before
exiting an interrupt service routine, the relevant interrupt
bit(s) should be cleared. To clear a bit efficiently:
Following is a description of EXT7. It contains both a Bank
Select Field and Interrupt Status Bits.
Bank Select Field. The four LSBs of EXT7 denote which
• Load the value of EXT7 into a register or memory
location
• Then load that value back into EXT7
bank is selected as the current working bank.
Interrupt Status Bits. These bits can be read to identify
which interrupts are pending. A “1” denotes interrupt pending, and a “0” denotes no interrupt. This ability to identify interrupts is particularly useful in polled interrupt operation or
when servicing ISR2, which may come from several sources.
Performing these steps clear all of the interrupts that
were pending, but leave the Register Bank Select
unchanged.
Ext 7 Reg
D15 D14 D13 D12 D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1 D0
Bank Select
0000 : Bank0
0001 : Bank1
:
:
1111 : Bank15
Interrupt Status Bits
Bit 4 = A/D Finish Interrupt
Bit 5 = SPI Interrupt
Bit 6 = Timer0 Interrupt
Bit 7 = Timer1 Interrupt
Bit 8 = Timer2 Interrupt
Bit 9 = INT0 (H/W) Interrupt
Bit 10 = INT1 (H/W) Interrupt
Bit 11 = INT2 (H/W) Interrupt
Reserved
Figure 20. EXT7 Register
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Interrupt Allocation RegisterÑBank15/EXT6
Bits 3–0 of the Interrupt Allocation Register define which
unique interrupt source the highest priority, and is allocated
to ISR0 (Interrupt Service Request 0).
Bits 7–4 of the Interrupt Allocation Register define which
unique interrupt source has the second highest priority, and
is allocated to ISR1 (Interrupt Service Request 1).
Bits 15–8 of the Interrupt Allocation Register are enable bits
for common interrupt sources which have the lowest priority, and are all allocated to ISR2 (Interrupt Service Request
2). All the enabled interrupts which are not allocated to ISR0
or ISR1, are allocated to ISR2. When an ISR2 interrupt occurs, the interrupt service routine must read the Interrupt
Status Register in EXT7 to determine the source. The Interrupt Status Register can be used for polling interrupts.
An Interrupt that is not selected as a source to ISR0, ISR1,
or ISR2, is disabled.
Bank 15/EXT6
D15 D14 D13 D12 D11 D10 D9 D8 D7
D6 D5 D4 D3 D2
D1 D0
ISR0 Source (highest priority)
0000 = A/D
0001 = SPI
0010 = C/T0
0011 = C/T1
0100 = C/T2
0101 = INT0
0110 = INT1
0111 = INT2
1xxx = ISR0 Disabled
ISR1 Source (medium priority)
0000 = A/D
0001 = SPI
0010 = C/T0
0011 = C/T1
0100 = C/T2
0101 = INT0
0110 = INT1
0111 = INT2
1xxx = ISR0 Disabled
ISR2 Interrupt Source (lowest priority)
1 = Enable, 0 = Disable
Bit 8 = A/D
Bit 9 = SPI
Bit 10 = C/T0
Bit 11 = C/T1
Bit 12 = C/T2
Bit 13 = INT0
Bit 14 = INT1
Bit 15 = INT2
Figure 21. Interrupt Allocation Register
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BANK/EXT REGISTER ASSIGNMENTS (Continued)
Interrupt Polarity RegisterÑBank14/EXT6
The trigger polarities, rising-edge or falling-edge, of all the
external interrupts are programmable.
Bank 14/Ext 6 Reg
D15 D14 D13 D12 D11 D10 D9 D8
D7
D6
D5
D4
D3
D2
D1 D0
INT0 Polarity
0 : Rising Edge (default)
1 : Falling Edge
INT1 Polarity
0 : Rising Edge (default)
1 : Falling Edge
INT2 Polarity
0 : Rising Edge (default)
1 : Falling Edge
Bits [15:3]—Reserved
Figure 22. Interrupt Polarity Register
Wait-State Control RegisterÑBank15/EXT3
The Wait-State Control Register enables the insertion of
wait states when the DSP accesses slow peripherals. This
register enables the insertion of one wait state on the ED
bus, providing 100 ns of access time instead of 50 ns when
operating at 20 MHz. When more than one wait state is nec-
essary, input pin P2.4/ WAIT can be used to provide additional wait states. The Wait-State Register enables the user
to specify which EXT registers, EXT0–EXT6, and which
operation, read and/or write, require a wait state. EXT7 is
an internal register, and requires no wait state.
Bank15/EXT3 Reg
D15 D14 D13 D12 D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1 D0
Wait-State EXT0
Wait-State EXT1
Wait-State EXT2
Wait-State EXT3
Wait-State EXT4
Wait-State EXT5
00 = read (nws), write (nws)
01 = read (nws), write (nws)
10 = read (ws), write (ws)
11 = read (ws), write (ws)
nws = no wait state
ws = one wait state
Wait-State EXT6
Bit14: 0 = Disabled WAIT Input Pin (default)
1 = Enabled P2.4 as WAIT Input Pin
Bit 15: 0 = Disabled UO0, UO1 (default)
1 = Enable UO0, UO1
Figure 23. Wait-State Control Register
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I/O PORTS
I/O pin allocation of ports for the different package types
is designed to provide configuration flexibility. Each port
line of Ports 0, 1, and 2 can be independently selected as
an input or an output. Each port’s output lines can be globally selected as push-pull or as open-drain outputs
Table 15. I/O Port Bit Allocations
Device Pins
P0 MSB
P0 LSB
P1
P2
P3
44-Pin PLCC,
44-Pin PQFP
64-Pin TQFP,
68-Pin PLCC
80-Pin PQFP
ED15–ED8, or
P0.15–P0.8, or
P1.7–P1.0
ED7–ED0, or
P0.7–P0.0
ED15–ED8, or
P0.15–P0.8
ED15–ED8, or
P0.15–P0.8
ED7–ED0, or
P0.7–P0.0
P1.7–P1.0
P2.7–P2.0
ED7–ED0, or
P0.7–P0.0
P1.7–P1.0
P2.7–P2.0
P3.7–P3.0
P2.4–P2.0
Open-Drain
OEN
PAD
Data Out
Data In
Auto Latch
R ≈ 500 kΩ
Figure 24. Port 0, 1 and 2 Configuration
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I/O PORTS (Continued)
Port0Ñ16-Bit Programmable I/O
Bank15/EXT0 is the Port0 direction control register.
Bank15/EXT1 includes specific bits to enable and configure Port0. The Port0 data register is Ext4 in Banks 0, 1, or 5.
Bank 15/Ext 0 Reg
D15 D14 D13 D12 D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1 D0
Port I/O Direction
0 = Input (default)
1 = Output
Figure 25. Port 0 Control Register
Bank 15/EXT1
D15 D14 D13 D12 D11 D10 D9
D8
D7
D6
D5
D4 D3
D2
D1 D0
Allocation of External Data (ED) Bus/Port0 Pins
000 = ED Bus 15-0 (default)
001 = Pins 15–8 ↔ P1.7–P1.0,
Pins 7–0 ↔ ED Bus 7–0
010 = Reserved
011 = Pins 15–8 ↔ P0.15–P08,
Pins 7–0 ↔ ED Bus 7–0
100 = P0.15–P0.0
101 = Pins 15–8 ↔ P1.7–P1.0
Pins 7–0 ↔ P0.7–P0.0
110 = Reserved
111 = Reserved
INT2
0 = Disabled (default)
1 = Enabled
INT1
0 = Disabled (default)
1 = Enabled
CLKOUT
0 = Disabled (default)
1 = Enabled
Port1 Outputs
0 = Push-Pull (default)
1 = Open-Drain
Port0 Outputs
0 = Push-Pull (default)
1 = Open-Drain
Port I/O Output Bit Directions
0 = Input (default)
1 = Output
Figure 26. Bank15/EXT1 Register
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Port1Ñ8-Bit Programmable I/O
Bank15/EXT1 is the Port1 control register. The MSB is the
Port1 direction control. Port1 data is accessed as the LSB
of EXT5 in Banks 0, 1, or 5. The Port1 pins can also be
mapped to internal functions. When INT2, CLKOUT, UI0
and UI1, or the SPI are enabled, they use Port1 pins. The
44-pin packages do not feature Port1 pins, however, Port1
and its internal functions can be mapped to the MSB of the
ED Bus/Port0 pins. See bits 2–0 of Bank15/EXT1.
Table 16. Port1 Bit Function Allocation
Port Pin
IF
Condition
Then
Else
P1.0/INT2
P1.1/CLKOUT
P1.2/SDI
P1.3/SDO
P1.4/SS
P1.5/SCLK
P1.6/UI0
Bank15/EXT1 Bit 3 = 1
Bank15/EXT1 Bit 5 = 1
Bank15/EXT4 Bit 0 = 1
Bank15/EXT4 Bit 0 = 1
Bank15/EXT4 Bit 0 = 1
Bank15/EXT4 Bit 0 = 1
Bank13/EXT1 Bits [2,1] = 10, or
Bank14/EXT1 Bits [2,1] = 10
Bank13/EXT1 Bits [2,1] = 11, or
Bank14/EXT1 Bits [2,1] = 11
Enable INT2
Enable CLKOUT
Enable SPI
Enable SPI
Enable SPI
Enable SPI
Enable UI0
INT2
CLKOUT
SDI
SDO
SS
SCLK
UI0
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
Enable UI1
UI1
P1.7
P1.7/UI1
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I/O PORTS (Continued)
Port2Ñ8-Bit Programmable I/O
Bank15/EXT2 is the Port2 control register. The LSB is the
Port2 direction control. Port2 data is accessed as the MSB
of EXT5 in Banks 0,1,or 5. The Port2 pins can also be
mapped to internal functions. When INT0, INT1, TMO0,
TMO1, WAIT, UI2, or TMO2 are enabled, they use Port2
pins. The 44-pin packages do not feature Port2 pins
P2.7–P2.5.
Table 17. Port2 Bit Function Allocation
Port Pin
IF
Condition
Then
Else
P2.0/INT0
P2.1/INT1
P2.2/TMO0
Bank15/EXT2 Bit 9 = 1
Bank15/EXT1 Bit 4 = 1
Bank13/EXT1 Bit [6,5] = 10, or
Bank14/EXT1 Bit [6,5] = 10
Bank13/EXT1 Bit [6,5] = 11, or
Bank14/EXT1 Bit [6,5] = 11
Enable INT0
Enable INT1
Enable TMO0
INT0
INT1
TMO0
P2.0
P2.1
P2.2
Enable TMO1
TMO1
P2.3
Enable WAIT
C/T2 clock is UI2
Enable TMO2
WAIT
UI2
TMO2
P2.7
P2.4
P2.5
P2.6
P2.7
P2.3/TMO1
P2.4/WAIT
Bank15/EXT3 Bit 14 = 1
Bank15/EXT2 Bit 13 = 1
Bank15/EXT2 Bits 14 = 1
P2.5/UI2
P2.6/TMO2
P2.7
Bank 15/EXT2
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Port2 I/O Directions
0 = Input (default)
1 = Output
Port3
0 = Disabled (default)
1 = Enabled
INT0
0 = Disabled (default)
1 = Enabled
Port2 Outputs
0 = Push-Pull (default)
1 = Open-Drain
Counter/Timer2
0 = Disabled (default)
1 = Enabled
Counter/Timer2 Operation
0 = Stopped (default)
1 = Counting
If D15 = 0, Counter/Timer2 Clock defined by
0 = System Clock/2 (default)
1 = UI2
If D15 = 1, Counter/Timer2 Sleep Mode Wake-Up
0 = Disabled (default)
1 = Enabled
TMO2
0 = Disabled (default)
1 = Enabled
Counter/Timer2 Clock
0 = Defined by D13 (default)
1 = CLKI
Figure 27. Bank15/EXT2 Register
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16-Bit Digital Signal Processors with A/D Converter
Port3Ñ8-BIt Programmable I/O
Port3 is an additional I/O port available only in the 80-pin
package. P3.3–P3.0 are inputs and P3.7–P3.4 are outputs.
Bit 8 of Bank15/EXT2 enables and disables Port3. The LSB
of Bank2/EXT5 is the Port3 Data Register.
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16-Bit Digital Signal Processors with A/D Converter
ZiLOG
PERIPHERALS
Analog to Digital Converter (A/D)
The A/D is a 4-channel 8-bit half-flash converter. It uses
two reference resistor ladders, one for the upper 5 bits, and
another for the lower 3 bits. Two external reference voltage
input pins, VAHI and VALO, set the input voltage measurement conversion range. The converter is auto-zeroed
prior to each sampling period. Bank13/EXT0 is the A/D
control register.
The conversion time depends on the system clock frequency
and the selection of the A/D prescaler value, bits
DIV2–DIV0. The clock prescaler can be programmed to derive a 2 µs conversion time. For example, when deriving
the A/D clock from a 20-MHz system clock, the A/D prescaler value should be set to divide by 40.
Bits ADST1–ADST0 determine one of the following start
conversion options:
•
Writing to the ADCTL control register
•
ISR1
•
C/T2 time-out
•
C/T0 time-out
Bits QUAD and SCAN determine one of the following
Modes of operation:
•
One channel is converted four times, with the results sequentially written to result registers 0, 1, 2 and 3.
•
One channel is converted one time, with the respective
result register updated.
•
Four channels are converted one time each, with the respective four result registers updated.
•
Four channels are converted repeatedly, with the respective four result registers constantly updated.
When one of the two four-channel modes is selected, the
channel specified by CSEL1–CSEL0 will convert first. The
other three channels will convert in sequence. In the sequence, AN0 follows AN3.
Bit ADIE enables the A/D to generate interrupts at the end
of a conversion. Bit ADIT determines whether an interrupt
occurs after the first or fourth conversion.
To reduce power consumption the A/D can be disabled by
clearing the ADE bit.
The start conversion operation may begin at any time. If a
conversion is in progress, and a new start conversion signal
is received, the conversion in progress will abort, and a new
conversion will initiate.
ISR1
C/T0
Though the A/D will function with smaller input signals and
reference voltages, the noise and offsets remain constant.
The relative error of the converter will increase and the conversion time will also take longer.
C/T2
ADCTL Reg.
Start
Converter
A/D
Control
Register
A/D
Prescaler
Channel Select
Internal
Bus
Quad
Scan
AN0
AN1
AN2
4-Channel
Multiplexer
Sample
and
Hold
Half-Flash
A/D
Converter
4x8
Result
Register
AN3
Figure 28. ADC Architecture
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ZiLOG
Bank13/EXT0 (LSB)
Bank13/EXT0 (MSB)
D7 D6 D5 D4 D3 D2 D1 D0
D15 D14 D13 D12 D11 D10 D9 D8
CSEL0
CSEL1
ADST0
ADST1
(Reserved)
ADIE
SCAN
ADIT
QUAD
DIV0
DIV1
DIV2
ADCINT
(Reserved)
ADE
Figure 29. ADCTL Register (LSB)
Table 18. A/D Prescaler Values (Bits 7, 6, 5)
DIV2
DIV1
DIV0
A/D Prescaler
(Crystal divided by)
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
8
16
24
32
40
48
56
64
Figure 30. ADCTL Register (MSB)
ADE (Bit 15). A “0” disables any A/D conversions or ac-
cessing any A/D registers, except writing to the ADE bit.
A “1” enables all A/D accesses.
Reserved (Bits 14, 13). Reserved for future use.
ADCINT (Bit 12). The A/D interrupt bit is read-only. The
ADCINT will reset every time this register is written.
ADIT (Bit 11). Selects when to set the A/D interrupt if in-
terrupts are enabled (ADIE=1). A value of “0” sets the interrupt after the first A/D conversion is complete. A value
of “1” sets the interrupt after the fourth A/D conversion is
complete.
ADIE (Bit 10). A/D Interrupt Enable. A value of “0” dis-
Table 19. Operating Modes (Bits 4, 3)
QUAD
SCAN
0
0
0
1
1
0
1
1
ables the A/D Interrupt. A value of “1” enables the A/D Interrupt.
Option
Convert selected channel 4 times,
then stop
Convert selected channel,
then stop.
Convert 4 channels,
then stop.
Convert 4 channels
continuously.
Table 20. Channel Select (Bits 1, 0)
CSEL1
CSEL0
Channel
0
0
1
1
0
1
0
1
AN0
AN1
AN2
AN3
DS000202-DSP0599
Table 21. START (Bits 9, 8)
ADST1
ADST0
0
0
0
1
1
0
1
1
Option
Conversion starts when this
register is written.
Conversion starts on INT1 per
Interrupt Allocation Register
Conversion starts on C/T2
time-out.
Conversion starts on C/T0
time-out.
There are four A/D result registers. See the EXT Register
Assignments for their location in the different banks.
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ZiLOG
PERIPHERALS (Continued)
Counter/Timers (C/T0 and C/T1)
The Z893x3 features two 16-bit Counter/Timers (C/T) that
can be independently configured to operate in various
modes. Each is implemented as a 16-bit Load Register and
a 16-bit down counter. Either C/T input can be selected from
UI0 or UI1. Either C/T output can be directed to TMO0 or
TMO1. The C/T clock is a scaled version of the system
clock. Each C/T features an 8-bit prescaler. The clock rates
of the two C/T are independent of each other. The C/Ts can
be programmed to recognize clock events on the rising
edge, the falling edge, or both rising and falling edges of
the input signal. Outputs on TMO0 or TMO1 can be programmed to occur with either polarity.
If either C/T is enabled and an output pin TMO0 or TMO1
is selected, and at the same time User Outputs are enabled,
the C/T takes precedence, and Status Register bits 5 or 6
do not affect the state of the selected pin.
C/T Modes of Operation:
MODE 0—Square Wave Output. The C/T is configured
to generate a continuous square wave of 50% duty cycle.
Writing a new value to the TMLR Register takes effect at
the end of the current cycle, unless TMR is written.
MODE 1—Retriggerable One-Shot. The C/T is config-
ured to generate a single pulse of programmable duration.
The pulse may be either logic High or logic Low. Retriggering the one-shot before the end of the pulse causes it to
retrigger for a new duration.
MODE 2—8-Bit PWM. The C/T is configured to generate
a pulse-width modulated waveform. The duty cycle ranges
from 0–100% (0/256 to 255/256; 8-bits) of a cycle in steps
of 1/256 of a cycle. The asserted state of the waveform may
be either logic High or logic Low. Writing a new pulsewidth value to the TMLR Register takes effect at the end
of current cycle, unless TMR is written.
from 0–100% (0/65,536 to 65,535/65,536; 16-bits) of a cycle in steps of 1/65,536 of a cycle. The asserted state of the
waveform may be either logic High or logic Low. Writing
a new pulse-width value to the TMLR Register takes effect
at the end of current cycle, unless TMR is written.
MODE 4—Finite Pulse String Generator. T h e C / T i s
configured to generate 1 to 65,535 pulses. The output pulses
are actually from the Timer Clock Prescaler divided by 2
(TMCLK). They are gated to the output until the Timer
Down-Counter underflows.
MODE 5—Externally Clocked One-Shot. T h e C / T i s
configured to generate an output pulse. The pulse may be
either logic High or logic Low. It is deasserted when a programmable number of input events (up to 65,535) occur on
the input pin, UI0 or UI1.
MODE 6—Software Watch-Dog Timer. The C/T is configured to generate a Hardware Reset on time-out, unless
retriggered by software.
MODE 7—Hardware Watch-Dog Timer. The C/T is configured to generate a Hardware Reset on time-out unless retriggered by an event on the input pin, UI0 or UI1.
MODE 8—Pulse Stopwatch. The C/T is configured to
measure the time during which its input is asserted.
MODE 9—Edge-to-Edge Stopwatch. The C/T is configured to measure the period from one rising (falling) edge
to the next rising (falling) edge on the input.
MODE 10—Edge Counter. The C/T is configured to count
a number of input edges (up to 65,535). Input edges may
be selected as rising or falling or both.
MODE 11—Gated Edge Counter. The C/T is configured
to count the number of input edges (up to 65,535) in a time
window set by the second timer. Edges are counted until the
second timer underflows. Input edges may be selected as
rising, falling, or both.
MODE 3—16-Bit PWM. The C/T is configured to generate
a pulse-width modulated waveform. The duty cycle ranges
UI1 UI0
15
1
8 7
Zeros
TPLR
0
15
TMLR
0
TMR
0
Timer Load Register
Prescaler Value
MUX
80h
15
TPR
System Clock
8-Bit Counter
÷2
16-Bit Down Counter
TMCLKIN = System Clock
2 x (TPR + 1)
MUX
TMCLKOUT = TMCLK
(TMR + 1)
Figure 31. Counter/Timer 0 and 1 Block Diagram
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Bank 13/EXT1 (C/T0) and Bank14/EXT1 (C/T1)
D15 D14 D13 D12 D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1 D0
C/T
0 = Disabled (default)
1 = Enabled
Input Select
00 = Inputs have no effect (default)
01 = Reserved
10 = UI0 Pin
11 = UI1 Pin
Input Event
00 = Falling Edge (default)
01 = Rising Edge
10 = Both Rising and Falling Edges
11 = Reserved
Output Select
00 = Outputs Unaffected (default)
01 = Reserved
10 = Drive TMO0 Pin
11 = Reserved
Output Polarity
0 = Output asserted High on Timeout (default)
1 = Output asserted Low on Timeout
Mode of Operation
0000 = Square Wave Output (default)
0001 = Retriggerable One-Shot
0010 = PWM (8-bit)
0011 = PWM (16-bit)
0100 = Finite Pulse String Generator
0101 = Externally-Clocked One-Shot
0110 = Software Watch-Dog Timer
0111 = Hardware Watch-Dog Timer
1000 = Pulse Stopwatch
1001 = Edge-to-edge Stopwatch
1010 = Edge Counter
1011 = Gated Edge Counter
Reserved
Test Mode*
0 = Normal Operation
1 = Factory Test Mode
*Note: The user should always program this bit to "0".
Figure 32. C/T0 and C/T1 Control Register
C/T Registers
Each C/T contains a set of five 16-bit Registers. Bank13 is
used to access the registers for C/T0 and Bank14 is for the
C/T1 registers. All accesses to C/T Registers occur with
zero wait states.
Counter/Timer Control Register (Bank13,14/EXT1). The
C/T Control register enables/disables the C/T, selects input
and output options, and the mode of operation.
TMLR—Load Register (Bank13,14/EXT2). T h e 1 6 - b i t
TMLR register holds the value that is loaded into TMR
when TMR underflows.
TMR—Counter Register (Bank13,14/EXT3). TMR is a
to TMR is different than writing to an ordinary register. A
write to TMR causes the contents of TMLR to be written
into TMR, causing the C/T to be retriggered.
TPLR—Prescaler Load Register (Bank13,14/EXT4). T h e
16-bit TPLR register holds the prescaler load value in its
lower 8 bits. Bit 15 must be written with a “1”, and bits 14–8
must be written with “0’s”.
Note: If the C/T interrupt is being used, this register must be rewritten at the end of the interrupt service routine in order
to enable the next interrupt. The number of clock cycles
from the beginning of the interrupt service routine to the
write must exceed the prescaler load value.
16-bit down counter that holds the current C/T value. It can
be read like any other ordinary register. However, writing
DS000202-DSP0599
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ZiLOG
PERIPHERALS (Continued)
TPR—Prescaler Register (Bank13,14/EXT5). TPR is an
8-bit down counter that holds the current Prescaler Count
Value. It can be read like any other ordinary register. However, writing to TPR is different than writing to an ordinary
register. A write to TPR causes the lower 8-bit contents of
TPLR to be written into TPR, causing the Prescaler to be
retriggered.
Bank 13,14/EXT2
15
0
Figure 33. TMLR—Load Register
Bank 13,14/EXT3
0
Timer Register
15
Ò1Ó
14
Zeros
0
TPR
8-Bit Counter
Figure 36. TPR—Prescaler Register
Prescaler Operation
After TPR is loaded, it decrements at the system clock frequency and generates an output to the divide-by-two flipflop. When the count reaches 0, the TPR counter is reloaded
from the lower 8 bits of TPLR Register.
Two other events cause a reloading of the TPR counter:
1. Writing to TPR
Figure 34. TMR—Counter Register
Bank 13,14/EXT4
8 7
Bank 13,14/EXT5
The Prescaler section comprises TPLR and TPR, followed
by a divide-by-two flip-flop. This operation generates a 50
percent duty cycle output, TMCLKIN. TPR’s input clock
is the system clock. The maximum prescaler output frequency is 1/2 the system clock frequency.
Timer Reload Value
15
7
2. Reloading TMR, which happens when TMR underflows, or when TMR is written.
0
Prescaler
Reload Value
Note: For C/T Modes 8–11, the external input signal on UI0 or
UI1 is synchronized with TMCLKIN before being applied to TMR. The external input signal frequency must
be no higher than 1/2 of the TMCLKIN frequency.
Figure 35. TPLR—Prescaler Load Register
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GENERAL-PURPOSE COUNTER/TIMER (C/T2)
This versatile16-bit C/T offers multiple uses, including
Sleep Mode Wake-up. It can be clocked with the slow
32 kHz crystal clock (CLKI), while the DSP and other peripheral functions operate at a higher frequency generated
by the PLL. Also included is an independent long duration
timer.
by 2. When the C/T2 output is enabled, it drives the TMO2
pin.
GPT is a 16-bit down counter that holds the current C/T value. It can be read like any other ordinary register. GPTL and
GPT share the same address, Bank14/EXT0. A write to
GPTL reloads GPT, causing the C/T to be retriggered.
When C/T2 underflows, it is reloaded with the most recent
value written to GPTL. If the C/T2 interrupt is enabled, at
underflow an interrupt is generated. The counting operation
of the counter can be disabled. The C/T clock source can
be selected to be CLKI, UI2, or the system clock divided
Table 22. C/T2 Bits D15 and D13
15
CLKI
D15
D13
C/T2 Clock
0
0
0
1
1
1
0
1
SYSCLK ÷ 2
(default)
UI2
CLKI
CLKI
GPTL–Bank14/EXT0 Write
Sleep/Wake-Up
Mode
n/a
n/a
Disabled
Enabled
0
Timer Load Register
UI2
System Clock
Bank 15/EXT2 is the control register for C/T2, and for I/O
Ports 2 and 3. Refer to the I/O Ports section, page 33, for a
description of the I/O port bit allocation.
MUX
÷2
TMR
15
16-Bit Down Counter
GPT–Bank14/EXT0 (Read)
0
MUX
TMO2
Sleep Mode
Wake-Up
Figure 37. Counter/Timer2 Block Diagram
DS000202-DSP0599
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ZiLOG
GENERAL-PURPOSE COUNTER/TIMER (C/T2) (Continued)
Bank 15/EXT2
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Port2 I/O Directions
0 = Input (default)
1 = Output
Port3
0 = Disabled (default)
1 = Enabled
INT0
0 = Disabled (default)
1 = Enabled
Port2 Outputs
0 = Push-Pull (default)
1 = Open-Drain
Counter/Timer2
0 = Disabled (default)
1 = Enabled
Counter/Timer2 Operation
0 = Stopped (default)
1 = Counting
If D15 = 0, Counter/Timer2 Clock defined by
0 = System Clock/2 (default)
1 = UI2
If D15 = 1, Counter/Timer2 Sleep Mode Wake-Up
0 = Disabled (default)
1 = Enabled
TMO2
0 = Disabled (default)
1 = Enabled
Counter/Timer2 Clock
0 = Defined by D13 (default)
1 = CLKI
Figure 38. Counter/Timer2 Control Register
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SERIAL PERIPHERAL INTERFACE
The Z893x3 incorporates a Serial Peripheral Interface (SPI)
for communication with other microcontrollers and peripherals. The SPI can be operated either as the system Master,
or as a system Slave. The SPI consists of three registers: the
SPI Control Register (Bank15/EXT4), the SPI Receive/Buffer Register (RxBUF), and the SPI Shift Register.
SPI Data Access
Receive operations are double buffered. Bank0/EXT3 accesses both RxBUF for read (receive) operations, and the
SPI shift register for write (transmit) operations.
Bank 0/EXT 3 Register
D7 D6 D5 D4 D3 D2 D1 D0
D15 D14
Bits 7Ð0 SPI Data (SPI Shift Register for transmit and RxBUF for receive)
Bit 14 Receive Character Available
Bit 15 Receive Character Overrun
SPI Control Register
This register is the Low byte of Bank15/EXT4. It is a
read/write register that controls Master/Slave selection, SS
polarity, clock source and phase selection, and indicates
byte available and data overrun conditions. The control register is multifunction depending on Master/Slave mode selection.
In Master mode, Bit 6 defines the SPI clock source. A “1”
selects SCLK = C/T0 output, and a “0” selects SCLK = System Clock divided down by 2, 4, 8, or 16, as determined by
bits 1 and 2.
In Slave Mode, bit 1 is the Receive Byte Overrun flag. This
flag can be cleared by writing a “0” to this bit. Bit 2 is the
SDO output enable.A “0” tristates SDO, a “1” enables data
output on SDO. Bit 4 signals that a receive byte is available
in the RxBUF Register. If the associated interrupt enable
bit is enabled, an interrupt is generated.
Figure 39. SPI Data Access
Bank15/EXT4 (LSB)
D7 D6 D5 D4 D3 D2 D1 D0
SPI Enable
0 = Disable (default)
1 = Enable
Mode of Operation
0 = Slave
1 = Master
Receive Byte Overrun (Slave)
SPI Clock Source Select (Master)
0 = System Clock divided down.
1 = C/T0
Output Enable(Slave)
0 = Tri-State SDO
1 = Enable SDO as Output
SCLK Polarity
0 = Transmit on Falling Edge, Receive on Rising Edge
1 = Transmit on Rising Edge, Receive on Falling Edge
SCLK Frequency (Master)
00 = System Clock ÷2
01 = System Clock ÷4
10 = System Clock ÷8
11 = System Clock ÷16
Received Byte Available
Slave Select Polarity
0 = SS Active Low (default)
1 = SS Active High
Figure 40. SPI Control Register
Master Mode Operation
The DSP must first activate the target slave’s select pin
through an I/O port. Loading data into the SPI Shift Register
initiates the transfer. Data is transferred out the SDO pin to
the slave one data bit per SCLK cycle. The MSB is shifted
out first. At the conclusion of the transfer, the Receive Byte
DS000202-DSP0599
Available flag is set, and if enabled, an SPI interrupt is generated. The Receive Byte Available flag is reset when RxBUF is read.
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ZiLOG
SERIAL PERIPHERAL INTERFACE (Continued)
Slave Mode Operation
SS must be asserted to enable a data transfer. Incoming data
on the SDI pin is shifted into the SPI Shift Register one data
bit per SCLK cycle. When a byte of data is received, the
SPI Shift Register contents are automatically copied into
RxBUF. The Receive Byte Available flag is set, and if enabled, an SPI interrupt is generated. The next byte of data
may be received at this time. The current byte in RxBUF
must be read before the next byte’s reception is complete,
or the Receive Byte Overrun flag will set, and the data in
C/T0
RxBUF will be overwritten. The Receive Byte Available
flag is reset when RxBUF is read.
Unless the SPI output, SDO, is disabled, for every bit that
is transferred into the slave through the SDI pin, a bit is
transferred out through the SDO pin on the opposite clock
edge. During slave operation, SCLK is an input.
Note: Slave Mode is not available on the 44-pin package.
System
Clock
(from PLL Block)
SCLK/P1.5
SPI Clock
SPI•
I/O
SPI
Counter
Interrupt
SPI Shift Register
SDO/P1.3
SDI/P1.2
SS/P1.4
SPI Receive Buffer (RxBuf)
SPI Control (SCON)
INT
Figure 41. SPI Block Diagram
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ZiLOG
SYSTEM CLOCK GENERATOR
The System Clock can be generated from an external clock
signal, or from the internal crystal oscillator. For the latter
case, a 32-kHz crystal is used in conjunction with the internal crystal oscillator. The system clock generator includes a Phase-Locked Loop (PLL) circuit to derive a highfrequency System Clock from the low-frequency crystal oscillator. The benefits of using a low-frequency crystal are
Off-Chip
On-Chip
lower system cost, lower power consumption and lower
EMI.
The Z893x3 supports several low-power clock modes to optimize power consumption. Total power consumption depends on System Clock frequency, and which oscillators
and peripherals are enabled.
PLL
LPF
LPF
VCO
Phase
Detector
8-Bit
Clock
Divide
VCO Out
00
÷2
01
÷2
MUX
PLL Out
10
÷2
CLKI
1
System Clock
MUX
0
11
System
Clock
Select
PLL Out. Sel.
Clock
Stop VCO
Control
PLL Divisor
Register
PLL In
CLKI
32 kHz
CLKO
XTAL
Osc.
Stop XTAL Osc
Figure 42. System Clock Generator
Modes of Operation
The various modes of clock operation are selected by writing to the appropriate bits and fields of the Clock Control
Register, Bank15/EXT5. The mode of operation can be
switched dynamically during program execution.
Power-up and Reset (Default)
At power-up, and following a reset or Sleep Mode Recovery, System Clock Select = 0, therefore system clock =
CLKI. The XTAL Oscillator is running, so CLKI may be
provided by a crystal, as depicted, or by an external clock
(not shown). The VCO is running to minimize the time required to switch the system clock to PLL Out.
External Clock Direct
In this mode, an external clock on CLKI provides the System Clock. CLKO is not connected. System Clock Select
= 0. The PLL is not used. The XTAL oscillator and VCO
are both stopped to reduce power consumption.
DS000202-DSP0599
Crystal Oscillator DIrect
In this mode of operation, the XTAL Oscillator is running,
and an external crystal provides a 32-kHz (typical) clock
at CLKI. System Clock Select = 0, so the System Clock is
the frequency at CLKI (32 kHz). This mode requires less
power than running at a high-frequency clock rate. The
VCO may be stopped to conserve even more power, or left
running for rapid switching (wake up) to a high-frequency
PLL generated clock. Whenever the PLL circuit is enabled,
Stop VCO = 0, and a software delay of 10 ms must be observed before switching System Clock from CLKI to PLL
Out. As a result, the PLL has time to stabilize.
PLL Clock
An external 32-kHz crystal, together with the on-chip
XTAL oscillator, provides the PLL input. The VCO generates the System Clock. A low-pass filter must be connected to LPF as depicted. The XTAL oscillator and VCO are
both running, and System Clock = PLL Out (System Clock
Select = 1). The frequency generated by the PLL is deter-
47
Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
SYSTEM CLOCK GENERATOR (Continued)
mined by the PLL Divisor value in the MSB of the Clock
Control Register, Bank15/EXT5:
Table 23. Standard Clock Mode Summary
VCO Frequency = 4 x PLL Divisor x PLL In Frequency.
The PLL Divisor value should be between 1 and156 to obtain a VCO Frequency between 128 kHz and 20 MHz from
a 32-kHz input.
There are four options for PLL Out: VCO Out, VCO Out
divided by 2, VCO Out divided by four, or twice the crystal
frequency. This selection is determined by the PLL Out Select bits in the Clock Control Register.
Note: The PLL is designed and tested to operate with an input
frequency of approximately 32 kHz. It is possible to
drive the input with a crystal or user-generated clock at
some other frequency, but the results are not guaranteed.
Sleep Modes
The Z893x3 supports various Clock Modes to minimize device power consumption. The lowest power mode is Deep
Sleep in which the System Clock is stopped, and the VCO
and XTAL Oscillator are both turned off.
Stop
XTAL
Osc.
Stop
VCO
Sys
Clk
Sel
XTAL,
User
XTAL
XTAL
0
0
0
0
0
0
1
1
0
User
XTAL,
User
1
1
1
1
0
1
CLKI
Src
Mode
Power-up/Reset
(default)
PLL Clock
Crystal Oscillator
Direct
External Clock Direct
Deep Sleep
(lowest power)
Wake-Up From Sleep Modes
The Wake-up Trigger Source is specified by bits 5 and 6
of the Clock Control Register. The polarity of the Wakeup signal is defined by bit 7. Wake-up occurs when the
wake-up signal is toggled to the specified wake-up polarity.
Wake-up resumes operation starting from the reset vector
address in the same way the chip responds to an external
RESET.
Bank 15/Ext 5 Reg
D15 D14 D13 D12 D11 D10 D9 D8
D7 D6 D5 D4 D3 D2 D1 D0
STOP_OSC
0 : Oscillator Running
1 : Stop Oscillator
STOP_VCO
0 : VCO Running
1 : Stop VCO
BYPASS_PLL
0 : Clock Source is Oscillator
1 : Clock Source is VCO
DSP (System) Clock Source
00 : VCO Clock
01 : VCO Clock Divided by 2
10 : VCO Clock Divided by 4
11 : Twice the Crystal Frequency
Recovery Source
00 : POR (Power-On Reset) or
Port 2, Bit 0 (INT0)
01 : POR or Port 1, Bit 4 (SS)
10 : POR or Port 1, Bit 6 (UI0)
11 : POR or Port 2, Bit 0 or
Port 1, Bit 4 or Port 1, Bit 6
STOP Recovery Level
0 : Low (Default setting after reset)
1 : High
Programmable PLL Divider Register
System Clock = Bits 15Ð8 x 4 x Crystal Frequency (32.768 kHz)
Figure 43. System Clock Control Register
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16-Bit Digital Signal Processors with A/D Converter
ZiLOG
INSTRUCTION SET
The addressing modes are:
, . These modes are used for loads to
and from registers within the chip, such as loading to the
accumulator, or loading from a pointer register. The names
of the registers are specified in the operand field (destination
first, then source).
. This mode is used for access to the lower 16 ad-
dresses in each bank of RAM. The 4-bit address comes from
2 bits of the status register and 2 bits of the operand field
of the data pointer. Data registers can be used to access data
in RAM, but typically are used as pointers to access data
from the program memory.
. Similar to the previous mode, the address for the
program memory read is stored in the Accumulator. Hence,
@A in the second operand field loads the number in memory specified by the address in A.
. The direct mode allows read or write to data RAM
from the Accumulator by specifying the absolute address
of the RAM in the operand of the instruction. A number between 0 and 255 indicates a location in RAM bank 0, and
a number between 256 and 511 indicates a location in RAM
bank 1.
. This address mode indicates a short immediate
operand. It is used to load 8-bit data into the specified RAM
pointer.
. This mode is used for indirect access to the data
RAM. The address of the RAM location is stored in the
pointer. The “@” symbol indicates “indirect” and precedes
the pointer. For example, @P1:1 refers to the location in
RAM bank 1 specified by the value in the pointer.
. This mode is used for indirect access to the
program memory. The address of the memory is located in
a RAM location, which is specified by the value in a pointer.
Therefore, @@P1:1 instructs the processor to read from a
location in memory, which is specified by a value in RAM,
and the location of the RAM is in turn specified by the value
in the pointer.
Note: the data pointer can also be used for a memory access in
this manner, but only one “@” precedes the pointer. In
both cases, each time the addressing mode is used, the
memory address stored in RAM is incremented by one
to allow easy transfer of sequential data from program
memory.
. This address mode indicates a long immediate operand. A 16-bit word can be loaded directly from the operand into the specified register or memory location.
Table 24. Instruction Set Addressing Modes
Symbolic Name
(points to RAM)
(points to Program
Memory)
(points to RAM)
(points to Program
Memory)
Syntax
Pn:b
Dn:b
X, Y, PC, SR, P, EDn, A, BUS
@A
Description
Pointer Registers
Data Registers
Hardware Registers
Accumulator Memory Indirect
#
#
@Pn:b
@Pn:b+
@Pn:b–LOOP
Direct Address Expression
Long (16-bit) Immediate Value
Short (8-bit) Immediate Value
Pointer Register Indirect
Pointer Register Indirect with Increment
Pointer Register Indirect with Loop
Decrement
Pointer register Indirect with Loop Increment
Pointer Register Memory Indirect
@Pn:b+LOOP
@@Pn:b
@Dn:b
@@Pn:b–LOOP
@@Pn:b+LOOP
@@Pn:b+
DS000202-DSP0599
Data Register Memory Indirect
Pointer Register Memory Indirect with Loop
Decrement
Pointer Register Memory Indirect with Loop
Increment
Pointer Register Memory Indirect with
Increment
49
Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
CONDITION CODES
The following Instruction Description defines the condition
codes supported by the DSP assembler. If the instruction
description refers to the (condition code) symbol in
one of its addressing modes, the instruction only executes
if the condition is true.
Code
Description
C
EQ
F
IE
MI
NC
NE
NIE
NOV
NU0
NU1
NZ
OV
PL
U0
U1
UGE
Carry
Equal (same as Z)
False
Interrupts Enabled
Minus
No Carry
Not Equal (same as NZ)
Not Interrupts Enabled
Not Overflow
Not User Zero
Not User One
Not zero
Overflow
Plus (Positive)
User Zero
User One
Unsigned Greater Than or Equal (Same as
NC)
Unsigned Less Than (Same as C)
Zero
ULT
Z
50
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Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
INSTRUCTION DESCRIPTIONS
Inst.
Description
Synopsis
ABS
Absolute
Value
Addition
ABS[,]
ADD
AND
CALL
CCF
CIEF
COPF
CP
DEC
INC
JP
Operands
,A
A
ADD,
A,
A,
A,
A,
A,
A,
A,
A,
Bitwise AND AND,
A,
A,
A,
A,
A,
A,
A,
A,
Subroutine
CALL
,
call
[,]
Clear C flag CCF
None
Clear IE Flag CIEF
None
Clear OP flag COPF
None
Comparison CP,
A,
A,
A,
A,
A,
A,
A,
A,
Decrement
DEC [,]
A,
A
Increment
INC [,]
,A
A
Jump
JP [,] ,
DS000202-DSP0599
Words Cycles Examples
1
1
1
1
2
1
1
1
1
1
1
1
2
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
2
2
1
1
1
1
2
3
1
1
1
1
1
1
2
3
1
1
1
1
2
2
1
1
1
1
1
3
1
1
1
2
1
1
1
1
1
2
2
ABS NC, A
ABS A
ADD A,P0:0
ADD A,D0:0
ADD A,#%1234
ADD A,@@P0:0
ADD A,%F2
ADD A,@P1:1
ADD A,X
ADD A, #%12
AND A,P2:0
AND A,D0:1
AND A,#%1234
AND A,@@P1:0
AND A,%2C
AND A,@P1:2+LOOP
AND A,EXT3
AND A, #%12
CALL Z,sub2
CALL sub1
CCF
CIEF
COPF
CP A,P0:0
CP A,D3:1
CP A,@@P0:1
CP A,%FF
CP A,@P2:1+
CP A,STACK
CP A,#%FFCF
CP A, #%12
DEC NZ,A
DEC A
INC PL,A
INC A
JP C,Label
JP Label
51
Z89223/273/323/373
16-Bit Digital Signal Processors with A/D Converter
ZiLOG
INSTRUCTION DESCRIPTIONS (Continued)
Inst.
Description
Synopsis
Operands
Words Cycles Examples
LD
Load
destination
with source
LD,
A,
A,
A,
A,
A,
A,
,A
,
,
,
,
,
,
,
,
,
,
,
,
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
3
1
1
1
1
1
1
1
1
1
2
3
3
1
1
LD A,X
LD A,D0:0
LD A,P0:1
LD A,@P1:1
LD A,@D0:0
LD A,124
LD 124,A
LD D0:0,EXT7
LD P1:1,#%FA
LD P1:1,EXT1
LD@P1:1,#1234
LD @P1:1+,X
LD Y,P0:0
LD SR,D0:0
LD PC,#%1234
LD X,@A
LD Y,@D0:0
LD A,@P0:0–LOOP
LD X,EXT6
Notes:
When is , cannot be P.
When is and is , cannot be EXTn if is EXTn,
cannot be X if is X, cannot be SR if is SR.
When is cannot be A.
MLD
Multiply
MLD , ,
1
1
MLD A,@P0:0+LOOP
[,]
,,
1
1
MLD A,@P1:0,OFF
1
1
MLD @P1:1,@P2:0
,
1
1
MLD @P0:1,@P1:0,ON
,,
Notes:
If src1 is it must be a bank 1 register. Src2’s
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