DSM2150F5V-12T6

DSM2150F5V DSM (Digital Signal Processor System Memory) for Analog Devices DSPs (3.3V Supply) FEATURES SUMMARY ■ ■ ■ ■ ■ ■ Glueless Connection to DSP – Easily add memory, logic, and I/O to the External Port of ADSP-218x, 219x, 2106x, 2116x, 2153x, and TS101 families of DSPs from Analog Devices, Inc. Dual Flash Memories – Two independent Flash memory arrays for storing DSP code and data – Capable of read-while-write concurrent Flash memory operation – Device can be configured as 8-bit or 16-bit – Built-in programmable address decoding logic allows mapping individual sectors of each Flash array to any address boundary – Each Flash sector can be write protected 512 KByte Main Flash memory – Ample storage for boot loading DSP code/ data upon reset and subsequent code swaps – Large capacity for storing tables and constants or for data recording 32 KByte Secondary Flash memory – Smaller sector size ideal for storing calibration and configuration constants. Eliminate external serial EEPROM. – Optionally bypass internal DSP boot ROM during start-up and execute code directly from Secondary Flash. Use for custom start-up code and In-Application Programming (IAP). Up to 40 Multifunction I/O Pins – Increase total DSP system I/O capability – I/O controlled by DSP software or PLD logic General purpose PLD – Use for peripheral glue logic to keypads, control panel, displays, LCDs, and other devices – Over 3,000 gates of PLD with 16 macro cells – Eliminate PLDs and external logic devices – Create state machines, chip selects, simple shifters and counters, clock dividers, delays – Simple PSDsoft Express™ development software, free from www.st.com/psm August 2004 Figure 1. TQFP 80-pin Package TQFP80 (T) ■ ■ ■ ■ ■ In-System Programming (ISP) with JTAG – Program entire chip in 15-35 seconds with no involvement of the DSP – Optionally links with DSP JTAG debug port – Eliminate need for sockets and preprogramming of memory and logic devices – ISP allows efficient manufacturing and product testing supporting Just-In-Time inventory – Use low-cost FlashLINK™ cable with any PC. Available from www.st.com/psm. Content Security – Programmable Security Bit blocks access of device programmers and readers Operating Range – VCC: 3.3V ± 10%, Temp: –40°C to +85°C Zero-Power Technology – 50µA standby current typical Flash Memory Speed, Endurance, Retention – 120ns, 100K cycles, 15 year retention 1/73 DSM2150F5V TABLE OF CONTENTS FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SUMMARY DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 PIN DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 ARCHITECTURAL OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 DSP Address/Data/Control Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Main Flash Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Secondary Flash Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Programmable Logic (PLDs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Runtime Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Memory Page Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 I/O Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 JTAG ISP Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Power Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Security and NVM Sector Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 RUNTIME CONTROL REGISTER DEFINITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 DETAILED OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Flash Memories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Reading Flash Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Read Memory Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Read Main Flash Identifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Read Memory Sector Protection Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Reading the Erase/Program Status Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Data Polling Flag (DQ7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Toggle Flag (DQ6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Error Flag (DQ5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Erase Time-out Flag (DQ3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 PROGRAMMING FLASH MEMORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 PLDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Turbo Bit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Decode PLD (DPLD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Complex PLD (CPLD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Output Macrocell (OMC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Product Term Allocator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Loading and Reading the OMCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 The OMC Mask Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 2/73 DSM2150F5V The Output Enable of the OMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Input Macrocells (IMC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 DSP BUS INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Typical Memory Map, DSM2150F5V and ADSP21535 BLACKFIN DSP. . . . . . . . . . . . . . . . . . . 33 Specifying the Memory Map with PSDsoft Express™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ADSP-21535 Blackfin DSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 ADSP-21062 SHARC DSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 ADSP-TS101S TigerSHARC DSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 ADSP-2191 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 ADSP-2188M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 I/O PORTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 General Port Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Port Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MCU I/O Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Drive Select Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DSP Data Bus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PLD Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PLD Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . JTAG In-System Programming (ISP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Enable Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ports A, B, and C – Functionality and Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Port D – Functionality and Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Port E – Functionality and Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Port F – Functionality and Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Port G – Functionality and Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 . . . . 41 . . . . 42 . . . . 43 . . . . 43 . . . . 43 . . . . 43 . . . . 43 . . . . 43 . . . . 44 . . . . 45 . . . . 46 . . . . 46 . . . . 46 POWER MANAGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 RESET TIMING AND DEVICE STATUS AT RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Power On Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Warm Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 I/O Pin, Register, and PLD Status at Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 PROGRAMMING IN-CIRCUIT USING JTAG ISP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Standard JTAG Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 JTAG Extensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 INITIAL DELIVERY STATE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 AC AND DC PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 DC AND AC OPERATING AND MEASUREMENT CONDITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 3/73 DSM2150F5V PACKAGE MECHANICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 APPENDIX A.TQFP80 PIN ASSIGNMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 APPENDIX B.CSIOP REGISTER BIT DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 REVISION HISTORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 4/73 DSM2150F5V SUMMARY DESCRIPTION The DSM2150F5V is an 8 or 16-bit system memory device for use with the Analog Devices DSPs. DSM means Digital signal processor System Memory. A DSM device brings In-System Programmable (ISP) Flash memory, parameter storage, programmable logic, and additional I/O to DSP systems. The result is a flexible two-chip solution for DSP designs. On-chip integrated memory decode logic makes it easy to map dual banks of Flash memory to the DSPs in a variety of ways for bootloading or bypassing DSP boot ROM, code execution, data recording, code swapping, and parameter storage. JTAG ISP reduces development time, simplifies manufacturing flow, and lowers the cost of field upgrades. The JTAG ISP interface eliminates the need for sockets and pre-programmed memory and logic devices. End products may be manufactured with a blank DSM device soldered down and programmed at the end of the assembly line in 15 to 35 seconds with no involvement of the DSP. Rapidly program test code, then application code as determined by Just-In Time inventory requirements. Additionally, JTAG ISP reduces development time by turning fast iterations of DSP code in the lab. Code updates in the field require no product disassembly. The FlashLINK™ JTAG programming cable costs $59 USD and plugs into any PC parallel port. Programming through conventional device insertion programmers is also available using PSDpro from STMicroelectronics and other 3rd party programmers. See www.st.com/psm. DSM devices add programmable logic (PLD) and up to 32 configurable I/O pins to the DSP system. The state of I/O pins can be driven by DSP software or PLD logic. PLD and I/O configuration are programmable by JTAG ISP. The PLD consists of more than 3000 gates and has 16 macro cell registers. Common uses for the PLD include chip-selects for external devices, state-machines, simple shiftier and counters, keypad and control panel interfaces, clock dividers, handshake delay, muxes, etc., eliminating the need for small external PLDs and logic devices. Configuration of PLD, I/O, and Flash memory mapping is easily entered in a point-and-click environment using the software development tool, PSDsoft Express™, available at no charge from www.st.com/psm. The two-chip DSP/DSM combination is ideal for systems having limitations on size, EMI levels, and power consumption. DSM memory and logic are “zero-power”, meaning they automatically go to standby between memory accesses or logic input changes, producing low active and standby current consumption, which is ideal for battery powered products. A programmable security bit in the DSM protects its contents from unauthorized viewing and copying. When set, the security bit will block access of programming devices (JTAG or others) to the DSM Flash memories and PLD configuration. The only way to defeat the security bit is to erase the entire DSM device, after which the device is blank and may be used again. The DSP will always have access to Flash memory contents through the data bus, even with security bit set. Figure 2. System Block Diagram, Two Chip Solution SERIAL DEVICE SERIAL DEVICE SDRAM HOST MCU ANALOG DEVICES DSP ADDRESS CONTROL ADSP-218x ADSP-219x ADSP-2153x ADSP-2106x ADSP-2116x ADSP-TS101S 8 or 16 DATA PRIMARY FLASH MEMORY 512 Kbytes SECONDARY FLASH MEMORY 32 Kbytes 16 MACROCELL PLD 16 I/O PORTS WITH I/O, PLD, CHIP SELECTS PLD I/O BUS I/O FLAGS ADDR & DECODE LOGIC DSM2150F5V DSP SYSTEM MEMORY 8 to 16 I/O GENERAL PURPOSE I/O PORTS I/O CONTROL POWER MANAGEMENT CONTENT SECURITY JTAG ISP TO ALL AREAS JTAG ISP JTAG DEBUG (All But ADSP-218x Family) AI05732 5/73 DSM2150F5V Table 1. DSM2150F5V DSP Memory System Devices Part Number Main Flash Memory Secondary Flash Mem PLD I/O Ports VCC and I/O Mem Package Op Temp Speed DSM2150F5V-12T6 512 KBytes, eight 64-KByte sectors 32 KBytes, four 8-KByte sectors 16 macro cells Up to 40 3.3V ±10% 120ns 80-pin TQFP –40oC to +85oC Table 2. Compatible Analog Devices DSPs DSP Part Number Core Operating Voltage I/O Voltage ADSP-2183, 2184L, 2185L, 2186L, 2187L 3.3V 3.3V ADSP-2185M, 2186M, 2188M, 2189M 2.5V 3.3V ADSP-2184N, 2185N, 2186N, 2187N, 2188N, 2189N 1.8V 3.3V ADSP-2191M, 2195M, 2196M 2.5V 3.3V Blackfin ADSP-21532S 3.3V 3.3V Blackfin ADSP-21535P 1.5V 3.3V Sharc ADSP-21060L, 21061L, 21062L, 21065L 3.3V 3.3V Sharc ADSP-21160M 2.5V 3.3V Sharc ADSP-21160N, 21161N 1.8V 3.3V Tiger Sharc ADSP-TS101S 1.0V 3.3V 6/73 DSM2150F5V 61 PB0 62 PB1 63 PB2 64 PB3 65 PB4 66 PB5 67 PB6 69 VCC 68 PB7 70 GND 71 PE0 72 PE1 73 PE2 74 PE3 75 PE4 76 PE5 77 PE6 78 PE7 79 PD0 80 PD1 Figure 3. TQFP Connections PD2 1 60 CNTL1 PD3 2 59 CNTL0 AD0 3 58 PA7 AD1 4 57 PA6 AD2 5 56 PA5 AD3 6 55 PA4 AD4 7 54 PA3 GND 8 53 PA2 VCC 9 AD5 10 52 PA1 AD6 11 50 GND AD7 12 49 GND AD8 13 48 PC7 AD9 14 47 PC6 AD10 15 46 PC5 AD11 16 45 PC4 AD12 17 44 PC3 AD13 18 43 PC2 AD14 19 42 PC1 AD15 20 41 PC0 CNTL2 40 RESET 39 PF7 38 PF6 37 PF5 36 PF4 35 PF3 34 PF2 33 PF1 32 PF0 31 VCC 29 GND 30 PG7 28 PG6 27 PG5 26 PG4 25 PG3 24 PG2 23 PG1 22 PG0 21 51 PA0 AI04943 7/73 DSM2150F5V PIN DESCRIPTION Table 3. Pin Description (Pin Assignments in Appendix A) Pin Name Type AD0-15 In CNTL0 In Description Sixteen address inputs from the DSP. Active low WRITE strobe input from the DSP, typically connected to DSP WR signal. Also functions as WRL for DSPs which use WRL strobe when writing low byte only in 16-bit word. CNTL1 In Active low READ strobe input from the DSP. Programmable control input. CNTL2 In CNTL2 may be used for BHE (Byte High Enable) when DSM2150F5V is configured for 16-bit operation. BHE = ’0’ will allow a byte WRITE from data lines D8-D15 ignoring data lines D0-D7. BHE = 1 will allow a byte WRITE from D0-D7 ignoring data lines D8-D15. DSP READ operations are not affected by BHE (always read both bytes). Active low reset input from system. Reset PA0-7 PB0-7 PC0-7 PD0-3 8/73 In Resets DSM I/O Ports, Page Register contents, and other DSM configuration registers. Must be logic Low at Power-up. I/O Eight configurable Port A signals with the following functions: – MCU I/O – DSP may write or read pins directly at runtime with csiop registers. – CPLD Output Macrocell (McellA0-7) outputs. – Inputs to the PLDs (via Input Macrocells). Can be used to input address A16 and above. Note: PA0-PA7 may be configured at run-time as standard CMOS or Open Drain Outputs. I/O Eight configurable Port B signals with the following functions: – MCU I/O – DSP may write or read pins directly at runtime with csiop registers. – CPLD Output Macrocell (McellB0-7 or McellC0-7) outputs. – Inputs to the PLDs (via Input Macrocells). Can be used to input address A16 and above. Note: PB0-PB7 may be configured at run-time as standard CMOS or Open Drain Outputs. I/O Eight configurable Port C signals with the following functions: – MCU I/O – DSP may write or read pins directly at runtime with csiop registers. – DPLD chip-select outputs (ECS0-7, does not consume MicroCells). – Inputs to the PLDs (via Input Macrocells). Can be used to input address A16 and above. Note: PC0-PC7 may be configured at run-time as standard CMOS or Faster Slew Rate Output. I/O Four configurable Port D signals with the following functions: – MCU I/O – DSP may write or read pins directly at runtime with csiop registers. – Input to the PLDs (no associated Input Macrocells, routes directly into PLDs). Can be used to input address A16 and above. – PD1 can be configured as CLKIN, a common clock input to PLD. – PD2 can be configured as CSI, active low Chip Select Input to select Flash memory. Flash memory is disabled to conserve more power when CSI is logic high. – PD3 can be used for WRH strobe from DSP to write high byte only for 16-bit configuration. DSM2150F5V Pin Name Type PE0-7 PF0-7 I/O I/O Description Eight configurable Port E signals with the following functions: – MCU I/O – DSP may write or read pins directly at runtime with csiop registers. – PE0, PE1, PE2, and PE3 can form the JTAG IEEE-1149.1 ISP serial interface as signals TMS, TCK, TDI, and TDO respectively. – PE4 and PE5 can form the enhanced JTAG signals TSTAT and TERR respectively. Reduces ISP programming time up to 30% when used in addition to the standard four JTAG signals: TDI, TDO, TMS, TCK. – PE4 can be configured as the Ready/Busy output to indicate Flash memory programming status during parallel programming. May be polled by DSP or used as DSP interrupt. Note 1: PE0-PE7 may be configured at run-time as either standard CMOS or Open Drain Outputs. Note 2: The JTAG ISP pins may be multiplexed with other I/O functions. Port F connects to eight data bus signals, D0 - D7 from DSP. Port G connects to eight data bus signals, D8 - D15 from DSP if 16-bit data path is used. PG0-7 I/O Otherwise, PG0-PG7 can be used for general purpose MCU I/O pins. Note: PG0-PG7 may be configured at run-time as standard CMOS or Open Drain Outputs. VCC Supply Voltage GND Ground pins 9/73 DSM2150F5V ARCHITECTURAL OVERVIEW Major functional blocks are shown in Figure 4. DSP Address/Data/Control Interface These DSP signals attach directly to the DSM for a glueless connection. An 8-bit or 16-bit data connection is formed and 16 or more DSP address lines can be decoded as well as various DSP memory strobes; i.e. BMS, RD, AWE, IOMS, MSx, etc. The data path width must be specified as 8bits or 16-bits in PSDsoft Express. This configura- tion is a static, meaning the data path width cannot switch between 8-bits and 16-bits during runtime. Port F is used for 8-bit data path, Ports F and G are used for 16-bit data path. There are many different ways the DSM2150F5V can be configured and used depending on system requirements. See Appendices for example connections between the DSM2150F5V and different DSPs. Figure 4. Block Diagram INTERNAL ADDR, DATA, CONTROL BUS LINKED TO DSP DSP ADDR AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 AD8 AD9 AD10 AD11 AD12 AD13 AD14 AD15 I/O PORT SECURITY LOCK TO PLD IN BUS PAGE REG MAIN FLASH DECODE PLD 8 BLOCKS, 64 KB 512 KBytes total FS0-7 4 BLOCKS, 8 KB 32 KBytes total RUNTIME CONTROL GPIO PLD POWER MNGMT PLD INPUT BUS I/O PORT ECS0-7 PB0 PB1 PB2 PB3 PB4 PB5 PB6 PB7 GENERAL PLD AND ARRAY DSP DATA or GP I/O PG0 PG1 PG2 PG3 PG4 PG5 PG6 PG7 PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 CSBOOT0-3 CSIOP PF0 PF1 PF2 PF3 PF4 PF5 PF6 PF7 I/O PORT SECONDARY FLASH DSP DATA A A A A A A A A B B B B B B B B 16 OUTPUT MICROCELLS A A A A A A A A C C C C B B B B B B B B C C C C I/O PORT PC0 PC1 PC2 PC3 PC4 PC5 PC6 PC7 24 INPUT MICROCELLS PIN FEEDBACK DSP CNTL CNTL0 CNTL1 CNTL2 RST\ PD0 PD1 PD2 PD3 NODE FEEDBACK I/O PORT INTERNAL ADDR, DATA, CONTROL BUS LINKED TO DSP DSM2150F5V DSP System Memory JTAG ISP CONTROLLER PE0 PE1 PE2 PE3 PE4 PE5 PE6 PE7 AI05776 10/73 DSM2150F5V Main Flash Memory The 4M bit (512 KByte) Main Flash memory is divided into eight equally-sized 64 KByte sectors that are individually selectable through the Decode PLD. Each Flash memory sector can be located at any address as defined by the user with PSDsoft Express. DSP code and data are easily placed in flash memory using PSDsoft Express, the software development tool. Secondary Flash Memory The 256Kbit (32 KByte) Secondary Flash memory is divided into eight equally-sized 8 KByte sectors that are individually selectable through the Decode PLD. Each Flash memory sector can be located at any address as defined by the user with PSDsoft Express. DSP code and data can also be placed Secondary Flash memory using the PSDsoft Express development tool. Secondary flash memory is good for storing data because of its smaller sectors. Software EEPROM emulation techniques can be used for small data sets that change frequently on a byte-by-byte basis. Secondary flash may also be used to store custom start-up code for applications that do not “boot” using DMA, but instead start executing code from external memory upon reset (bypass internal DSP boot ROM). Storing code here can keep the entire Main Flash free of initialization code for clean software partitioning. If only one or more 8 KByte sectors are needed for start-up code, the remaining sectors of Secondary Flash may be used for data storage. In-Application-Programming (IAP) may be implemented using Secondary Flash. For example, code to implement IAP over a USB channel may be stored here. The DSP executes code from Secondary Flash array while erasing and writing new code to the Main Flash array as it is received over the USB channel. Any communication channel that the DSP supports can be used for IAP. Secondary Flash may also be used as an extension to Main Flash memory producing a total of 544 KBytes. Miscellaneous: Main and Secondary Flash memories are totally independent, allowing concurrent operation. The DSP can read from one memory while erasing or programming the other. The DSP can erase Flash memories by individual sectors or the entire Flash memory array may be erased at one time. Each sector in either Flash memory array may be individually write protected, blocking any WRITEs from the DSP (good for boot and start-up code protection). The Flash memories automatically go to standby between DSP READ or WRITE accesses to conserve power. Maximum access times include sector decoding time. Maxi- mum erase cycles is 100K and data retention is 15 years minimum. Flash memory, as well as the entire DSM device may be programmed with the JTAG ISP interface with no DSP involvement. Programmable Logic (PLDs) The DSM family contains two PLDS that may optionally run in Turbo or Non-Turbo Mode. PLDs operate faster (less propagation delay) while in Turbo Mode but consume more power than NonTurbo Mode. Non-Turbo Mode allows the PLDs to automatically go to standby when no inputs are change to conserve power. The Turbo Mode setting is controlled at runtime by DSP software. Decode PLD (DPLD). This is programmable logic used to select one of the eight individual Main Flash memory segments, one of four individual Secondary Flash memory segments, or the group of control registers within the DSM device. The DPLD can also drive external chip select signals on Port C pins. DPLD input signals include: DSP address and control signals, Page Register outputs, DSM Port Pins, CPLD logic feedback. Complex PLD (CPLD). This programmable logic is used to create both combinatorial and sequential general purpose logic. The CPLD contains 16 Output Macrocells (OMCs) and 24 Input Macrocells (IMCs). PSD Macrocell registers are unique in that they have direct connection to the DSP data bus allowing them to be loaded and read directly by the DSP at runtime. This direct access is good for making small peripheral devices (shiftier, counters, state machines, etc.) that are accessed directly by the DSP with little overhead. DPLD inputs include DSP address and control signals, Page Register outputs, DSM Port Pins, and CPLD feedback. OMCs: The general structure of the CPLD is similar in nature to a 22V10 PLD device with the familiar sum-of-products (AND-OR) construct. True and compliment versions of 73 input signals are available to a large AND array. AND array outputs feed into a multiple product-term OR gate within each OMC (up to 10 product-terms for each OMC). Logic output of the OR gate can be passed on as combinatorial logic or combined with a flipflop within in each OMC to realize sequential logic. OMCs can be used as a buried nodes with feedback to the AND array or OMC output can be routed to pins on Port A or Port B. IMCs: Inputs from pins on Ports A, B or C are routed to IMCs for conditioning (clocking or latching) as they enter the chip, which is good for sampling and debouncing inputs. Alternatively, IMCs can pass Port input signals directly to PLD inputs without clocking or latching. The DSP may read the IMCs at any time. 11/73 DSM2150F5V Runtime Control Registers A block of 256 bytes is decoded inside the DSM device for control and status registers. 50 registers are used from the block of 256 locations to control the output state of I/O pins, to READ I/O pins, to control power management, to READ/WRITE macrocells, and other functions at runtime. See Table 4., page 13 for description. The base address of these 256 locations is referred to in this data sheet as csiop (Chip Select I/O Port). Individual registers within this block are accessed with an offset from the base address. Some DSPs can access csiop registers using I/O memory with the IOMS strobe (if equipped). csiop registers are bytes. When the DSM is configured for 16-bit operation, csiop registers are read in byte pairs at even addresses only. Care should be taken while writing csiop registers to ensure the proper byte is written within the byte pair. This is not a problem for DSPs that support the BHE (Byte High Enable) signal on the CNTL2 input pin, or WRL, WRH (WRITE low byte, WRITE high byte) on the CNTL0 and PD3 input pins of the DSM2150F5V. Memory Page Register This 8-bit register can be loaded and read by the DSP at runtime as one of the csiop registers. Its outputs feed directly into both PLDs. The page register can be used for special memory mapping requirements and also for general logic. I/O Ports The DSM has 52 individually configurable I/O pins distributed over the seven ports (Ports A, B, C, D, E, F, and G). At least 32 I/O are available when DSM2150F5V is connected with 8-bit data path, and at least 24 I/O are available with 16-bit data path. Each I/O pin can be individually configured for different functions such as standard MCU I/O ports or PLD I/O on a pin by pin basis. (MCU I/O means that for each pin, its output state can be controlled or its input value can be read by the DSP at runtime using the csiop registers like an MCU would do.) The static configuration of all Port pins is defined with the PSDsoft Express™ software development tool. The dynamic action of the Ports pins is controlled by DSP runtime software. JTAG ISP Port In-System Programming (ISP) can be performed through the JTAG signals on Port E. This serial interface allows programming of the entire DSM device or subsections (that is, only Flash memory, for example) without the participation of the DSP. A blank DSM device soldered to a circuit board can be completely programmed in 15 to 35 seconds. 12/73 The basic JTAG signals; TMS, TCK, TDI, and TDO form the IEEE-1149.1 interface. The DSM device does not implement the IEEE-1149.1 Boundary Scan functions. The DSM uses the JTAG interface for ISP only. However, the DSM device can reside in a standard JTAG chain with other JTAG devices and it will remain in BYPASS Mode while other devices perform Boundary Scan. ISP programming time can be reduced as much as 30% by using two more signals on Port E, TSTAT and TERR in addition to TMS, TCK, TDI and TDO. The FlashLINK™ JTAG programming cable is available from STMicroelectronics for $USD59 and PSDsoft Express software is available at no charge from www.st.com/psm. That is all that is needed to program a DSM device using the parallel port on any PC or notebook. See PROGRAMMING IN-CIRCUIT USING JTAG ISP, page 49. Power Management The DSM has bits in csiop registers that are configured at run-time by the DSP to reduce power consumption of the CPLD. The Turbo Bit in the PMMR0 register can be set to logic '1' and the CPLD will go to Non-Turbo Mode, meaning it will latch its outputs and go to sleep until the next transition on its inputs. There is a slight penalty in PLD performance (longer propagation delay), but significant power savings are realized. Additionally, other bits in two csiop registers can be set by the DSP to selectively block signals from entering the CPLD which reduces power consumption. Both Flash memories automatically go to standby current between accesses. No user action required. Security and NVM Sector Protection A programmable security bit in the DSM protects its contents from unauthorized viewing and copying. When set, the security bit will block access of programming devices (JTAG or others) to the DSM Flash memory and PLD configuration. The only way to defeat the security bit is to erase the entire DSM device, after which the device is blank and may be used again. Additionally, the contents of each individual Flash memory sector can be write protected (sector protection) by configuration with PSDsoft Express™. This is typically used to protect DSP boot code from being corrupted by inadvertent WRITEs to Flash memory from the DSP. DSM2150F5V RUNTIME CONTROL REGISTER DEFINITION A block of 256 addresses are decoded inside the DSM2150F5V for control and status. 50 locations contain registers that the DSP accesses at runtime. The base address of the registers is called csiop (Chip Select I/O Port). Table 4 lists the reg- isters and their offsets (in hexadecimal) from the csiop base. See Appendix B for bit definitions. Note: Do not write to unused locations, they should remain logic zero. Note: See Table 14., page 48 for register state at reset and at power-on. Table 4. CSIOP Registers and Their Offsets (in Hexadecimal) Register Name Port Port Port Port Port Port Other A B C D E G Description Data In 00 01 10 11 30 41 MCUI/O Input Mode. Read to obtain current logic level of Port pins. No WRITEs. Data Out 04 05 14 15 34 45 MCU I/O Output Mode. Write to set logic level on Port pins. Read to check status. Direction 06 07 16 17 36 47 MCU I/O Mode. Configures Port pin as input or output. Write to set direction of Port pins. Logic ’1’ = out, Logic ’0’ = in. Read to check status. Drive Select 08 09 18 19 38 49 Write to configure Port pins as either standard CMOS or Open Drain on some pins, while selecting high slew rate on other pins. Read to check status. Input Macrocells 0A 0B 1A Read to obtain state of IMCs. No WRITEs. Enable Out 0C 0D 1C Read to obtain the status of the output enable logic on each I/O Port driver. No WRITEs. Output Macrocells A 20 Read to get logic state of output of OMC bank A. Write to load registers of OMC bank A. Output Macrocells B 21 Read to get logic state of output of OMC bank B. Write to load registers of OMC bank B. Mask Macrocells A 22 Write to set mask for loading OMCs in bank A. Logic ’1’ in a bit position will block READs/WRITEs of the corresponding OMC. Logic ’0’ will pass OMC value. Read to check status. Mask Macrocells B 23 Write to set mask for loading OMCs in bank B. Logic ’1’ in a bit position will block READs/WRITEs of the corresponding OMC. Logic ’0’ will pass OMC value. Read to check status. Main Flash Sector Protect C0 Read to determine Main Flash Sector Protection Setting. No WRITEs. Security Bit and Secondary Flash Sector Protection C2 Read to determine if DSM devices Security Bit is active. Logic ’1’ = device secured. Also read to determine Secondary Flash Protection Setting status. No WRITEs. JTAG Enable C7 Write to enable JTAG Pins (optional feature). Read to check status. PMMR0 B0 Power Management Register 0. WRITE and READ. PMMR2 B4 Power Management Register 2. WRITE and READ. Page E0 Memory Page Register. WRITE and READ. Memory_ID0 F0 Read to get size of Main Flash memory. No WRITEs. Memory_ID1 F1 Read to get size of 2nd Flash memory. No WRITEs. 13/73 DSM2150F5V DETAILED OPERATION Figure 4., page 10 shows major functional areas of the device: ■ Flash Memories ■ PLDs (DPLD, CPLD, Page Register) ■ DSP Bus Interface (Address, Data, Control) ■ I/O Ports ■ Runtime Control Registers ■ JTAG ISP Interface The following describes these functions in more detail. Flash Memories The Main Flash memory array is divided into eight equal 64 KByte sectors. The Secondary Flash memory array is divided into four equal 8 KByte sectors. Each sector is selected by the DPLD can be separately protected from program and erase cycles. This configuration is specified by using PSDsoft Express™. Memory Sector Select Signals. The DPLD generates the Select signals for all the internal memory blocks (see Figure 7., page 26). Each of the twelve sectors of the Flash memories has a select signal (FS0-FS7, or CSBOOT0-CSBOOT3) which contains up to three product terms. Having three product terms for each select signal allows a given sector to be mapped into multiple areas of system memory if needed. Ready/Busy (PE4). This signal can be used to output the Ready/Busy status of the device. Ready/ Busy is a ’0’ (Busy) when either Flash memory array is being written, or when either Flash memory array is being erased. The output is a ’1’ (Ready) when no WRITE or Erase cycle is in progress. This signal may be polled by the DSP or used as a DSP interrupt to indicate when an erase or program cycle is complete. 14/73 Memory Operation. The Flash memories are accessed through the DSP Address, Data, and Control Bus Interface. DSPs and MCUs cannot write to Flash memory as it would an SRAM device. Flash memory must first be “unlocked” with a special sequence of WRITE operations to invoke an internal algorithm, then a single data byte (or word if DSM2150F5V is configured for 16-bit operation) is written to the Flash memory array, then programming status is checked by a READ operation or by checking the Ready/Busy pin (PE4). This “unlocking” sequence optionally may be bypassed by using the Unlock Bypass command to reduce programming time. Table 5., page 15 lists all of the special instruction sequences to program (write) data to the Flash memory arrays, erase the arrays, and check for different types of status from the arrays when the DSM2150F5V is configured to operate as an 8-bit device. Table 6 lists instruction sequences when the DSM2150F5V is configured for 16-bit operation. These instruction sequences are different combinations of individual WRITE and READ operations. IMPORTANT: The DSP cannot read and execute code from the same Flash memory array for which it is directing an instruction sequence. Or more simply stated, the DSP may not read code from the same Flash array that is writing or erasing. Instead, the DSP must execute code from an alternate memory (like its own internal SRAM or a different Flash array) while sending instructions to a given Flash array. Since the two Flash memory arrays inside the DSM device are completely independent, the DSP may read code from one array while sending instructions to the other. After a Flash memory array is programmed (written) it will go to “Read Array” Mode, then the DSP can read from Flash memory just as if would from any ROM or SRAM device. DSM2150F5V Table 5. Instruction Sequences for 8-bit Operation (Notes 1,2,3,4) Instruction Sequence Cycle 1 Cycle 2 Cycle 3 Cycle 4 Cycle 5 Cycle 6 Read Memory Contents5 Read byte from any valid Flash memory addr Read Flash Identifier (Main Flash only)6,7 Write AAh to XX555h Write 55h to XXAAAh Write 90h to XX555h Read identifier at addr XXX01h Read Memory Sector Protection Status6,7,8 Write AAh to XX555h Write 55h to XXAAAh Write 90h to XX555h Read value at addr XXX02h Program a Flash Byte Write AAh to XX555h Write 55h to XXAAAh Write A0h to XX555h Write (program) data to addr Write AAh to Flash Bulk Erase9 XX555h Write 55h to XXAAAh Write 80h to XX555h Write AAh to XX555h Write 55h to XXAAAh Write 10h to XX555h Flash Sector Erase10 Write AAh to XX555h Write 55h to XXAAAh Write 80h to XX555h Write AAh to XX555h Write 55h to XXAAAh Write 30h to another Sector Suspend Sector Erase11 Write B0h to addr in FS0-7 or CSBOOT0-3 Resume Sector Erase12 Write 30h to addr in FS0-7 or CSBOOT0-3 Write 20h to XX555h Reset Flash 6 Cycle 7 Write 30h to another Sector Write F0h to addr in FS0-7 or CSBOOT0-3 Unlock Bypass Write AAh to XX555h Write 55h to XXAAAh Unlock Bypass Program13 Write A0h to addr in FS0-7 or CSBOOT0-3 Write (program) data to addr Unlock Bypass Reset14 Write 90h to addr in FS0-7 or CSBOOT0-3 Write 00h to addr in FS0-7 or CSBOOT03 Note: 1. All values are in hexadecimal, X = “Don’t care” 2. A desired internal Flash memory sector select signal (FS0 - FS7 or CSBOOT0 - CSBOOT3) must be active for each WRITE or READ cycle. Only one of these sector select signals will be active at any given time depending on the address presented by the DSP and the memory mapping defined in PSDsoft Express. FS0 - FS7 and CSBOOT0-CSBOOT3 are active high logic internally. 3. Only address Bits A11-A0 are used during Flash memory instruction sequence decoding bus cycles. The individual sector select signal (FS0 - FS7 or CSBOOT0-CSBOOT3) which is active during the instruction sequences determines the complete address. 4. For WRITE operations, addresses are latched on the falling edge of Write Strobe (WR, CNTL0), Data is latched on the rising edge of Write Strobe (WR, CNTL0) 5. No Unlock or Instruction cycles are required when the device is in the Read Array Mode. Operation is like reading a ROM device. 15/73 DSM2150F5V 6. The Reset Flash instruction is required to return to the normal Read Array Mode if the Error Flag Bit (DQ5) goes High, or after reading the Flash Identifier or after reading the Sector Protection Status. 7. The DSP cannot invoke this instruction sequence while executing code from the same Flash memory as that for which the instruction sequence is intended. The DSP must fetch, for example, the code from the DSP SRAM when reading the Flash memory Identifier or Sector Protection Status. 8. The data is 00h for an unprotected sector, and 01h for a protected sector. In the fourth cycle, the Sector Select is active, and (A1,A0) = (1,0) 9. Directing this command to any individual active Flash memory segment (FS0 - FS7) will invoke the bulk erase of all eight Flash memory sectors. Likewise, directing command to any Secondary Flash sector (CSBOOT0-3) will invoke erase of all four sectors. 10. DSP writes command sequence to initial segment to be erased, then writes the byte 30h to additional sectors to be erased. 30h must be addressed to one of the other Flash memory segments (FS0-7 or CSBOOT0-3) for each additional segment (write 30h to any address within a desired sector). No more time than tTIMEOUT can elapse between subsequent additional sector erase commands. 11. The system may perform READ and Program cycles in non-erasing sectors, read the Flash ID or read the Sector Protect Status, when in the Suspend Sector Erase Mode. The Suspend Sector Erase instruction sequence is valid only during a Sector Erase cycle. 12. The Resume Sector Erase instruction sequence is valid only during the Suspend Sector Erase Mode. 13. The Unlock Bypass instructions required prior to the Unlock Bypass Program Instruction. 14. The Unlock Bypass Reset Flash instruction is required to return to reading memory data when the device is in Unlock Bypass Mode. 16/73 DSM2150F5V Table 6. Instruction Sequences for 16-bit Operation (Notes 1,2,3,4,15) Instruction Sequence Cycle 1 Cycle 2 Cycle 3 Cycle 4 Cycle 5 Cycle 6 Read Memory Contents5 Read word from even addr Read Flash Identifier (Main Flash only)6,7 Write XXAAh to XXAAAh Write XX55h to XX554h Write XX90h to XXAAAh Read identifier at addr XXX02h Read Sector Protect Status6,7,8 Write XXAAh to XXAAAh Write XX55h to XX554h Write XX90h to XXAAAh Read value at addr XXX04h Program a Flash word Write XXAAh to XXAAAh Write XX55h to XX554h Write XXA0h to XXAAAh Write word to even address Flash Bulk Erase9 Write XXAAh to XXAAAh Write XX55h to XX554h Write XX80h to XXAAAh Write XXAAh to XXAAAh Write XX55h to XX554h Write XX10h to XXAAAh Flash Sector Erase10 Write XXAAh to XXAAAh Write XX55h to XX554h Write XX80h to XXAAAh Write XXAAh to XXAAAh Write XX55h to XX554h Write XX30h to new Sector Suspend Sector Erase11 Write XXB0h to even addr in FS0-7 or CSBOOT0-3 Resume Sector Erase12 Write XX30h to even addr in FS0-7 or CSBOOT0-3 Write XX20h to XXAAAh Reset Flash 6 Cycle 7 Write XX30h to new Sector Write XXF0h to even addr in FS0-7 or CSBOOT0-3 Unlock Bypass Write XXAAh to XXAAAh Write XX55h to XX554h Unlock Bypass Program13 Write XXA0h to even addr in FS0-7 or CSBOOT0-3 Write word to even addr Unlock Bypass Reset14 Write XX90h to even addr in FS0-7 or CSBOOT0-3 Write XX00h to even addr in FS0-7 or CSBOOT0-3 Note: 1. All values are in hexadecimal, X = “Don’t care” 2. A desired internal Flash memory sector select signal (FS0 - FS7 or CSBOOT0 - CSBOOT3) must be active for each WRITE or READ cycle. Only one of these sector select signals will be active at any given time depending on the address presented by the DSP and the memory mapping defined in PSDsoft Express. FS0 - FS7 and CSBOOT0-CSBOOT3 are active high logic internally. 3. Only address Bits A11-A0 are used during Flash memory instruction sequence decoding bus cycles. The individual sector select signal (FS0 - FS7 or CSBOOT0-CSBOOT3) which is active during the instruction sequences determines the complete address. 4. For WRITE operations, addresses are latched on the falling edge of Write Strobe (WR, CNTL0), Data is latched on the rising edge of Write Strobe (WR, CNTL0) 5. No Unlock or Instruction cycles are required when the device is in the Read Array Mode. Operation is like reading a ROM device. 6. The Reset Flash instruction is required to return to the normal Read Array Mode if the Error Flag Bit (DQ5) goes High, or after reading the Flash Identifier or after reading the Sector Protection Status. 17/73 DSM2150F5V 7. The DSP cannot invoke this instruction sequence while executing code from the same Flash memory as that for which the instruction sequence is intended. The DSP must fetch, for example, the code from the DSP SRAM when reading the Flash memory Identifier or Sector Protection Status. 8. The data is XX00h for an unprotected sector, and XX01h for a protected sector. In the fourth cycle, the Sector Select is active, and (A1,A0) = (1,0) 9. Directing this command to any individual active Flash memory segment (FS0 - FS7) will invoke the bulk erase of all eight Flash memory sectors. Likewise, directing command to any Secondary Flash sector (CSBOOT0-3) will invoke erase of all four sectors. 10. DSP writes command sequence to initial segment to be erased, then writes the word XX30h to additional sectors to be erased. XX30h must be addressed to one of the other Flash memory segments (FS0-7 or CSBOOT0-3) for each additional segment (write XX30h to any address within a desired sector). No more time than tTIMEOUT can elapse between subsequent additional sector erase commands. 11. The system may perform READ and Program cycles in non-erasing sectors, read the Flash ID or read the Sector Protect Status, when in the Suspend Sector Erase Mode. The Suspend Sector Erase instruction sequence is valid only during a Sector Erase cycle. 12. The Resume Sector Erase instruction sequence is valid only during the Suspend Sector Erase Mode. 13. The Unlock Bypass instructions required prior to the Unlock Bypass Program Instruction. 14. The Unlock Bypass Reset Flash instruction is required to return to reading memory data when the device is in Unlock Bypass Mode. 15. All bus cycles in an instruction sequence are WRITEs or READs to an even address (XXAAAh or XX554h), and only the low byte, D0-D7, is significant (upper byte on D8-D15 is ignored). A Flash memory Program bus cycle writes a word to an even address. 18/73 DSM2150F5V INSTRUCTIONS An instruction sequence consists of a sequence of specific WRITE or READ operations. IMPORTANT: When the DSM2150F5V is configured for 8-bit operations, all instruction sequences consist of byte WRITE and READ operations on an even or odd address boundary. Flash memory locations are programmed in bytes to even or odd addresses. When the DSM2150F5V is configured for 16-bit operation, all instruction sequences consist of word WRITE and READ operations on even address boundaries only. The lower byte on D0-7 is significant and the upper byte on D8-15 is ignored during instructions and status. Flash memory locations are programmed in 16-bit words to even addresses only. Each byte/word written to the device is received and sequentially decoded and not executed as a standard WRITE operation to the memory array until the entire command string has been received. The instruction sequence is executed when the correct number of bytes/words are properly received and the time between two consecutive bytes/words is shorter than the time-out period, tTIMEOUT. Some instruction sequences are structured to include READ operations after the initial WRITE operations. The instruction sequence must be followed exactly. Any invalid combination of instruction bytes/ words or time-out between two consecutive bytes/ words while addressing Flash memory resets the device logic into Read Array Mode (Flash memory is read like a ROM device). The device supports the instruction sequences summarized in Table 5., page 15 and Table 6., page 17: Flash memory: ■ Read memory contents ■ Read Main Flash Identifier value ■ Read Sector Protection Status ■ Program a Byte/Word ■ Erase memory by chip or sector ■ Suspend or resume sector erase ■ Reset to Read Array Mode ■ Unlock Bypass Instructions For efficient decoding of the instruction sequences, the first two bytes/words of an instruction sequence are the coded cycles and are followed by an instruction byte/word or confirmation byte/ word. The coded cycles consist of writing the data AAh to address XX555h (or XXAAh to address XXAAAh for 16-bit mode) during the first cycle and data 55h to address XXAAAh (or XX55h to address XX554 for 16-bit mode) during the second cycle. Address input signals A12 and above are “Don’t care” during the instruction sequence WRITE cycles. However, the appropriate internal Sector Select (FS0-FS7 or CSBOOT0-CSBOOT3, see Table 7) must be selected internally (active low is logic ’1’). Table 7. Status Bit Definition Functional Block FS0-FS7, or CSBOOT0-CSBOOT3 DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0 Flash Memory Active (the desired segment is selected) Data Polling Toggle Flag Error Flag X Erase Timeout X X X Note: 1. X = Not guaranteed value, can be read either ’1’ or ’0.’ 2. DQ7-DQ0 represent the Data Bus bits, D7-D0. 3. When the DSM2150F5V is configured for 16-bit operation, DQ8-DQ15 are not significant and can be ignored. 19/73 DSM2150F5V Reading Flash Memory Under typical conditions, the DSP may read the Flash memory using READ operations just as it would a ROM or RAM device. Alternately, the DSP may use READ operations to obtain status information about a Program or Erase cycle that is currently in progress. Lastly, the DSP may use instruction sequences to read special data from these memory blocks. The following sections describe these READ instruction sequences. Read Memory Contents Flash memory is placed in the Read Array Mode after Power-up, chip reset, or a Reset Flash memory instruction sequence (see Table 5., page 15 or Table 6., page 17). The DSP can read the memory contents of the Flash memory by using READ operations any time the READ operation is not part of an instruction sequence. Bytes are read from even or odd addresses when the DSM2150F5V is configured for 8-bit operation. Only 16-bit words are read from even addresses when the DSM2150F5V is configured for 16-bit operations. Read Main Flash Identifier The Main Flash memory identifier is read with an instruction sequence composed of 4 operations: 3 specific WRITE operations and a READ operation (see Table 5., page 15 or Table 6., page 17). During the READ operation the appropriate internal Sector Select (FS0-FS7) must be active. The identifier is E8h (or XXE8h for 16-bit mode). Not applicable to Secondary Flash. Read Memory Sector Protection Status The Flash memory Sector Protection Status is read with an instruction sequence composed of 4 operations: 3 specific WRITE operations and a READ operation (see Table 5., page 15 or Table 6., page 17). The READ operation will produce 01h (XX01h for 16-bit mode) if the Flash sector is protected or 00h (XX00h or 16-bit mode) if the sector is not protected. Internal Sector Select (FS0FS7 or CSBOOT0-CSBOOT3) designates the Flash memory sector whose protection has to be verified. Alternatively, the sector protection status can also be read by the DSP accessing the Flash memory Protection registers in csiop space. See the section entitled “Flash Memory Sector Protect” for register definitions. 20/73 Reading the Erase/Program Status Bits The device provides several status bits to be used by the DSP to confirm the completion of an Erase or Program cycle of Flash memory. These status bits minimize the time that the DSP spends performing these tasks and are defined in Table 7., page 19. The status bits can be read as many times as needed. DQ8 - DQ15 are insignificant and can be ignored when the DSM2150F5V is configured to operate in 16-bit mode, however, the READ operation must occur on an even address boundary. For Flash memory, the DSP can perform a READ operation to obtain these status bits while an Erase or Program instruction sequence is being executed by the embedded algorithm. See PROGRAMMING FLASH MEMORY, page 22, for details. Data Polling Flag (DQ7) When erasing or programming in Flash memory, the Data Polling Flag Bit (DQ7) outputs the complement of the bit being entered for programming/ writing on the Data Polling Flag Bit (DQ7). Once the Program instruction sequence or the WRITE operation is completed, the true logic value is read on the Data Polling Flag Bit (DQ7). – Data Polling is effective after the fourth WRITE pulse (for a Program instruction sequence) or after the sixth WRITE pulse (for an Erase instruction sequence). It must be performed at the address being programmed or at an address within the Flash memory sector being erased. – During an Erase cycle, the Data Polling Flag Bit (DQ7) outputs a ’0.’ After completion of the cycle, the Data Polling Flag Bit (DQ7) outputs the last bit programmed (it is a ’1’ after erasing). – If the byte/word to be programmed is in a protected Flash memory sector, the instruction sequence is ignored. – If all the Flash memory sectors to be erased are protected, the Data Polling Flag Bit (DQ7) is reset to ’0’ for tTIMOUT, and then returns to the previous addressed byte. No erasure is performed. DSM2150F5V Toggle Flag (DQ6) The device offers an alternative way for determining when the Flash memory Program cycle is completed. During the internal WRITE operation and when the Sector Select FS0-FS7 (or CSBOOT0CSBOOT3) is true, the Toggle Flag Bit (DQ6) toggles from ’0’ to ’1’ and ’1’ to ’0’ on subsequent attempts to read any byte of the memory. When the DSM2150F5V is configured to operate in 16-bit mode, status READs must occur at even addresses, DQ8 - DQ15 are insignificant and can be ignored. When the internal cycle is complete, the toggling stops and the data READ on the Data Bus is the addressed memory byte/word. The device is now accessible for a new READ or WRITE operation. The cycle is finished when two successive READs yield the same output data. – The Toggle Flag Bit (DQ6) is effective after the fourth WRITE operation (for a Program instruction sequence) or after the sixth WRITE operation (for an Erase instruction sequence). – If the byte/word to be programmed belongs to a protected Flash memory sector, the instruction sequence is ignored. – If all the Flash memory sectors selected for erasure are protected, the Toggle Flag Bit (DQ6) toggles to ’0’ for tTIMOUT and then returns to the previous addressed byte. Error Flag (DQ5) During a normal Program or Erase cycle, the Error Flag Bit (DQ5) is to ’0.’ This bit is set to ’1’ when there is a failure during Flash memory byte/word Program operation, Sector Erase, or Bulk Erase operation. In the case of Flash memory programming, the Error Flag Bit (DQ5) indicates the attempt to program a Flash memory bit from the programmed state, logic ’0,’ to the erased state, logic ’1’, which is not valid. The Error Flag Bit (DQ5) may also indicate a Time-out condition while attempting to program a byte/word. In case of an error in a Flash memory Sector Erase or byte/word Program cycle, the Flash memory sector in which the error occurred or to which the programmed byte/word belongs must no longer be used. Other Flash memory sectors may still be used. The Error Flag Bit (DQ5) is reset after a Reset Flash instruction sequence. Erase Time-out Flag (DQ3) The Erase Time-out Flag Bit (DQ3) reflects the time-out period allowed between two consecutive Sector Erase instruction sequence bytes/words. The Erase Time-out Flag Bit (DQ3) is reset to ’0’ after a Sector Erase cycle for a time period tTIMOUT unless an additional Sector Erase instruction sequence is decoded. After this time period, or when the additional Sector Erase instruction sequence is decoded, the Erase Time-out Flag Bit (DQ3) is set to ’1.’ 21/73 DSM2150F5V PROGRAMMING FLASH MEMORY When the DSM2150F5V is configured for 8-bit operation, Flash memory locations are programmed in 8-bit bytes to even or odd addresses. When the DSM2150F5V is configured for 16-bit operation, Flash memory locations are programmed in 16-bit words to even addresses only. However, some DSPs support the BHE (byte high enable) signal on the DSM2150F5V CNTL2 input or the WRL, WRH (Write Low Byte, Write High Byte) signals on the CNTL0 and PD3 inputs. In these cases, a DSP WRITE operation can be directed to an individual byte (upper or lower) of a byte-pair. These signals do not effect READ operations, only WRITEs. READs are always by 16bits from an even address. BHE signal on CNT2 input. See Table 8. Evenbyte refers to locations with address A0 equal to ’0,’ and odd byte as locations with A0 equal to ’1.’ WRL and WRH signals on CNT0 and PD3 inputs. See Table 9. Even-byte refers to locations with address A0 equal to ’0,’ and odd byte as locations with A0 equal to ’1.’ When a byte/word of Flash memory is programmed, individual bits are programmed to logic ’0.’ You cannot program a bit in Flash memory to a logic ’1’ once it has been programmed to a logic ’0.’ A bit must be erased to logic ’1,' and programmed to logic ’0.’ That means Flash memory must be erased prior to being programmed. The DSP may erase the entire Flash memory array all at once or individual sector-by-sector, but not byteby-byte (or word-by-word for 16-bit mode). Howev- 22/73 er, the DSP may program Flash memory byte-bybyte (or word-by-word for 16-bit mode). The Flash memory requires the DSP to send an instruction sequence to program a byte or to erase sectors (see Table 5., page 15 or Table 6., page 17). Once the DSP issues a Flash memory Program or Erase instruction sequence, it must check for the status bits for completion. The embedded algorithms that are invoked inside the device provide several ways give status to the DSP. Status may be checked using any of three methods: Data Polling, Data Toggle, or Ready/Busy (pin PE4). Table 8. 16-Bit Data Bus with BHE BHE A0 D15-D8 D7-D0 0 0 Odd Byte Even Byte 0 1 Odd Byte — 1 0 — Even Byte Table 9. 16-Bit Data Bus with WRH and WRL WRH WRL D15-D8 D7-D0 0 0 Odd Byte Even Byte 0 1 Odd Byte — 1 0 — Even Byte DSM2150F5V Data Polling. Polling on the Data Polling Flag Bit (DQ7) is a method of checking whether a Program or Erase cycle is in progress or has completed. Figure 5 shows the Data Polling algorithm. When the DSP issues a Program instruction sequence, the embedded algorithm within the device begins. The DSP then reads the location of the byte/word to be programmed in Flash memory to check status. For 16-bit operation, the status location READ must be at an even address and D8D15 can be ignored. The Data Polling Flag Bit (DQ7) of this location becomes the compliment of Bit 7 of the original data byte/word to be programmed. The DSP continues to poll this location, comparing the Data Polling Flag Bit (DQ7) and monitoring the Error Flag Bit (DQ5). When the Data Polling Flag Bit (DQ7) matches Bit 7 of the original data, and the Error Flag Bit (DQ5) remains ’0,’ then the embedded algorithm is complete. If the Error Flag Bit (DQ5) is ’1,’ the DSP should test the Data Polling Flag Bit (DQ7) again since the Data Polling Flag Bit (DQ7) may have changed simultaneously with the Error Flag Bit (DQ5) (see Figure 5). The Error Flag Bit (DQ5) is set if either an internal time-out occurred while the embedded algorithm attempted to program the byte/word or if the DSP attempted to program a ’1’ to a bit that was not erased (not erased is logic ’0’). It is suggested (as with all Flash memories) to read the location again after the embedded programming algorithm has completed, to compare the byte/word hat was written to the Flash memory with the byte/word that was intended to be written. When using the Data Polling method during an Erase cycle, Figure 5 still applies. However, the Data Polling Flag Bit (DQ7) is ’0’ until the Erase cycle is complete. A ’1’ on the Error Flag Bit (DQ5) indicates a time-out condition on the Erase cycle, a ’0’ indicates no error. The DSP can read any location (must be even address for 16-bit mode) within the sector being erased to get the Data Polling Flag Bit (DQ7) and the Error Flag Bit (DQ5). PSDsoft Express generates ANSI C code functions which implement these Data Polling algorithms. Figure 5. Data Polling Flowchart START READ DQ5 & DQ7 at VALID ADDRESS DQ7 = DATA YES NO NO DQ5 =1 YES READ DQ7 DQ7 = DATA YES NO FAIL PASS AI01369B 23/73 DSM2150F5V PLDs The PLDs bring programmable logic to the device. After specifying the logic for the PLDs using PSDsoft Express, the logic is programmed into the device and available upon Power-up. The PLDs have selectable levels of performance and power consumption. The device contains two PLDs: the Decode PLD (DPLD), and the Complex PLD (CPLD), as shown in Figure 6., page 25. The DPLD performs address decoding, and generates select signals for internal and external components, such as memory, registers, and I/O ports. The DPLD can generate eight External Chip Select (ECS0-ECS7) signals on Port C. The CPLD can be used for logic functions, such as loadable counters and shift registers, state machines, and encoding and decoding logic. These logic functions can be constructed using the 16 Output Macrocells (OMC), 24 Input Macrocells (IMC), and the AND Array. The AND Array is used to form product terms. These product terms are configured from the logic definition entered in PSDsoft Express. A PLD Input Bus consisting of 73 signals is connected to the PLDs. Input signals are shown in Table 10. Turbo Bit The PLDs in the device can minimize power consumption by switching to standby when inputs remain unchanged for an extended time tTURBO. Resetting the Turbo Bit to ’0’ (Bit 3 of the PMMR0 register) automatically places the PLDs into standby if no inputs are changing. Turning the Turbo Mode off increases propagation delays while reducing power consumption. Additionally, seven bits are available in the PMMR registers in csiop to 24/73 block DSP control signals from entering the PLDs. This reduces power consumption and can be used only when these DSP control signals are not used in PLD logic equations. Each of the two PLDs has unique characteristics suited for its applications. They are described in the following sections. Table 10. DPLD and CPLD Inputs Input Source Input Name Number of Signals DSP Address Bus1 A15-A0 16 DSP Control Signals2 CNTL2-CNTL0 3 Reset RST 1 PortA Input Macrocells PA7-PA0 8 PortB Input Macrocells PB7-PB0 8 PortC Input Macrocells PC7-PC0 8 Port D Inputs PD3-PD0 4 Page Register PG7-PG0 8 Macrocell A Feedback MCELLA FB7-0 8 Macrocell B Feedback MCELLB FB7-0 8 Flash memory Program Status Bit Ready/Busy 1 Note: 1. DSP address lines above A15 may enter the DSM device on any pin on ports A, B, C or D. See Appendices for recommended connections. 2. Additional DSP control signals may enter the DMS device on any pin on Ports A, B, C, or D. See Appendices for recommended connections. DSM2150F5V Figure 6. PLD Diagram 8 PAGE REGISTER Data Bus 8 DECODE PLD (DPLD) Main Flash Memory Selects 4 Secondary Flash Memory Selects 1 CSIOP Select 8 External Chip Selects to Port C PLD INPUT BUS 1 16 JTAG Select Direct Macrocell Access from MCU Data Bus Output Macrocell Feedback CPLD PT ALLOC. 73 MCELLA to PORT A 16 Output Macrocell 24 Input Macrocell (PORT A, B,C) I/O PORTS 73 MCELLB to PORT B 8 8 Direct Macrocell Input to MCU Data Bus 24 4 Input Macrocell and Input Ports PORT D Inputs AI05769 25/73 DSM2150F5V Decode PLD (DPLD) The DPLD, shown in Figure 7, is used for decoding the address for internal and external components. The DPLD can be used to generate the following decode signals: ■ 8 Main Flash memory Sector Select (FS0FS7) signals with three product terms each ■ 4 Secondary Flash memory Sector Select (CSBOOT0-CSBOOT3) signals with three product terms each ■ ■ ■ 1 internal csiop select for DSM device control and status registers (csiop is the base address of the block of 256 byte locations) 1 JTAG Select signal (enables JTAG operations on Port E when multiplexing JTAG signals with general I/O signals) 8 external chip select output signals for Port C pins, each with one product term. Figure 7. DPLD Logic Array 3 CSBOOT0 3 CSBOOT1 3 CSBOOT2 3 (INPUTS) I/O PORTS (PORT A,B,C) CSBOOT3 3 FS0 (24) 3 MCELLA.FB [ 7:0] (Feedback) (8) MCELLB.FB [ 7:0] (Feedback) (8) PG0-PG7 (8) FS1 3 FS2 3 FS3 3 A[15:0] FS5 (4) 3 FS6 CNTRL[2:0] (Read/Write Control Signals)(3) 3 RESET (1) RD_BSY (1) 8 Flash Main Memory Sector Selects FS4 (16) 3 PD[3:0] 4 Secondary Flash Memory Sector Selects FS7 1 CSIOP I/O Decoder Select 1 JTAGSEL JTAG ISP 1 ECS0 1 ECS1 1 ECS2 1 ECS3 1 ECS4 1 ECS5 1 ECS6 1 ECS7 External Chip Selects to PORT C AI05775 26/73 DSM2150F5V Complex PLD (CPLD) The CPLD can be used to implement system logic functions, such as loadable counters and shift registers, system mailboxes, handshaking protocols, state machines, and random logic. See Application Note AN1171 for details on how to specify logic using PSDsoft Express. The CPLD has the following blocks: ■ 24 Input Macrocells (IMC) ■ 16 Output Macrocells (OMC) ■ Product Term Allocator ■ AND Array capable of generating up to 190 product terms ■ Two I/O Ports. Each of the blocks are described in the sections that follow. The IMCs and OMCs are connected to the device internal data bus and can be directly accessed by the DSP. This enables the DSP software to load data into the OMC or read data from both the IMCs and OMCs. This feature allows efficient implementation of system logic and eliminates the need to connect the data bus to the AND Array as required in most standard PLD macro cell architectures. Figure 8. Macrocell and I/O Port PLD INPUT BUS Product Terms from other MacrocellS DSP ADDRESS / DATA BUS CPLD Macrocells I/O PORTS DATA LOAD CONTROL PT PRESET MCU DATA IN PRODUCT TERM ALLOCATOR DATA MCU LOAD I/O Pin D Q MUX POLARITY SELECT MUX CPLD OUTPUT PR DI LD D/T MUX PT CLOCK PLD INPUT BUS Macrocell Out to MCU GLOBAL CLOCK Q D/T/JK FF SELECT COMB. /REG SELECT PDR INPUT CK CL CLOCK SELECT Q DIR REG. D WR PT CLEAR PT Output Enable (OE) Macrocell Feedback I/O Port Input Input Macrocells MUX AND ARRAY WR UP TO 10 PRODUCT TERMS Q D Q D PT INPUT LATCH GATE/CLOCK G AI05770 27/73 DSM2150F5V Output Macrocell (OMC) Eight of the OMCs, McellA0-McellA7, are connected to Port A pins. The other eight Macrocells, McellB0-McellB7, are connected to Ports B pins. OMCs may be used for internal feedback (buried registers), or their outputs may be routed to external Port pins. The OMC architecture is shown in Figure 9., page 30. As shown in the figure, there are native product terms available from the AND Array, and borrowed product terms available (if unused) from other OMC. The polarity of the product term is controlled by the XOR gate. The OMC can implement either sequential logic, using the flip-flop element, or combinatorial logic. The multiplexer selects between the sequential or combinatorial logic outputs. The multiplexer output can drive a port pin and has a feedback path to the AND Array inputs. The flip-flop in the OMC block can be configured as a D, T, JK, or SR type in PSDsoft Express™. The flip-flop’s clock, preset, and clear inputs may be driven from a product term of the AND Array. Alternatively, CLKIN (PD1) can be used for the clock input to the flip-flop. The flip-flop is clocked on the rising edge of CLKIN (PD1). The preset and clear are active High inputs. Each clear input can use up to two product terms. Table 11. Output Macrocell Port and Data Bit Assignments Output Macrocell Port Assignment Native Product Terms Maximum Borrowed Product Terms Data Bit for Loading or Reading in 16-bit Mode Data Bit for Loading or Reading in 8-bit Mode McellA0 Port A0 3 6 D0 D0 McellA1 Port A1 3 6 D1 D1 McellA2 Port A2 3 6 D2 D2 McellA3 Port A3 3 6 D3 D3 McellA4 Port A4 3 6 D4 D4 McellA5 Port A5 3 6 D5 D5 McellA6 Port A6 3 6 D6 D6 McellA7 Port A7 3 6 D7 D7 McellB0 Port B0 4 5 D8 D0 McellB1 Port B1 4 5 D9 D1 McellB2 Port B2 4 5 D10 D2 McellB3 Port B3 4 5 D11 D3 McellB4 Port B4 4 6 D12 D4 McellB5 Port B5 4 6 D13 D5 McellB6 Port B6 4 6 D14 D6 McellB7 Port B7 4 6 D15 D7 28/73 DSM2150F5V Product Term Allocator The CPLD has a Product Term Allocator. PSDsoft Express™ uses the Product Term Allocator to borrow and place product terms from one Macrocell to another. This happens automatically in PSDsoft Express™, but understanding how allocation works will help you if your logic design does not “fit”, in which case you may try selecting a different pin or different OMC where the allocation resources may differ and the design will then fit. The following list summarizes how product terms are allocated: ■ McellA0-McellA7 all have three native product terms and may borrow up to six more ■ McellB0-McellB3 all have four native product terms and may borrow up to five more ■ McellB4-McellB7 all have four native product terms and may borrow up to six more. Each Macrocell may only borrow product terms from certain other Macrocells. Product terms already in use by one Macrocell are not available for another Macrocell. Product term allocation does not add any propagation delay to the logic. If an equation requires more product terms than are available to it through product term allocation, then “external” product terms are required, which consumes other OMC. This is called product term expansion and also happens automatically in PSDsoft Express™ as needed. Product tern expansion causes additional propagation delay because an OMC is consumed by the expansion and it’s output is rerouted (or fed back) into the AND array. You can examine the fitter report generated by PSDsoft Express to see resulting product term allocation and product term expansion. Loading and Reading the OMCs Each of the two OMC blocks (8 OMCs each) occupies a memory location in the DSP address space, as defined in the csiop block MCELLA0-7 and MCELLB0-7 (see Table 4., page 13). The flipflops in each of the 16 OMCs can be loaded from the data bus by a DSP. Loading the OMCs with data from the DSP takes priority over internal functions. As such, the preset, clear, and clock inputs to the flip-flop can be overridden by the DSP. The ability to load the flip-flops and read them back is useful in such applications as loadable counters and shift registers, mailboxes, and handshaking protocols. Data is loaded into the OMC on the trailing edge of Write Strobe coming from CNTL0. 29/73 DSM2150F5V Figure 9. CPLD Output Macrocell MASK REG. Output Macrocell CS INTERNAL DATA BUS RD PT Allocator WR Direction Register ENABLE (.OE) AND ARRAY PLD INPUT BUS PRESET(.PR) COMB/REG SELECT PT PT DIN PR MUX PT LD POLARITY SELECT IN CLEAR (.RE) CLR Port Driver Programmable FF (D / T/JK /SR) PT CLK CLKIN I/O Pin Q MUX Feedback (.FB) Port Input Input Macrocell AI05771 30/73 DSM2150F5V The OMC Mask Register There is one Mask Register for each of the two groups of eight OMCs. The Mask Registers can be used to block the loading of data to individual OMCs. The default value for the Mask Registers is 00h, which allows loading of all the OMCs. When a given bit in a Mask Register is set to a ’1,’ the DSP is blocked from writing to the associated OMC. For example, suppose McellA0-3 are being used for a state machine. You would not want a DSP WRITE to McellA to overwrite the state machine registers. Therefore, you would want to load the Mask Register for McellA group with the value 0Fh. The Output Enable of the OMC The OMC block can be connected to an I/O port pin as a PLD output. The output enable of each port pin driver is controlled by a single product term from the AND Array, ORed with the Direction Register output. The pin is enabled upon Powerup if no output enable equation is defined and if the pin is declared as a PLD output in PSDsoft Express. If the OMC output is specified as an internal node and not as a port pin output in the PSDsoft Express, then the port pin can be used for other I/O functions. The internal node feedback can be routed as an input to the AND Array. Input Macrocells (IMC) The CPLD has 24 IMCs, one for each pin on Ports A, B and C. The architecture of the IMCs is shown in Figure 10., page 32. The IMCs are individually configurable, and can be used as a latch, a register, or to pass incoming Port signals prior to driving them onto the PLD input bus. This is useful for sampling and debouncing inputs to the AND array (keypad inputs, etc.). Additionally, the outputs of the IMCs can be read by the DSP asynchronously at any time through the internal data bus using the csiop register block (see Table 4., page 13). The enable for the latch and clock for the register are driven by a product term from the CPLD. Each product term output is used to latch or clock four IMCs. Port inputs 3-0 can be controlled by one product term and 7-4 by another. Configurations for the IMCs are specified by equations specified in PSDsoft Express. See Application Note AN1171. 31/73 DSM2150F5V Figure 10. Input Macrocell INTERNAL DATA BUS INPUT MACROCELL _ RD DIRECTION REGISTER ENABLE ( .OE ) AND ARRAY PT OUTPUT Macrocells BC AND Macrocells AB I/O Pin PLD INPUT BUS PT Port Driver MUX Q D PT D FF Feedback Q D G LATCH Input Macrocell AI04904C 32/73 DSM2150F5V DSP BUS INTERFACE The “no-glue logic” DSP Bus Interface allows direct connection. DSP address, data, and control signals connect directly to the DSM device. See Appendices for typical connections. DSP address, data and control signals are routed to Flash memory, I/O control (csiop), OMCs, and IMCs within the DMS. The DSP address range for each of these components is specified in PSDsoft Express™. Typical Memory Map, DSM2150F5V and ADSP21535 BLACKFIN DSP There many different ways to place (or map) the addresses of DSM memory and I/O depending on system requirements. The DPLD allows complete mapping flexibility. Figure 11., page 34 shows one possible system memory map. In this example, the DSP will bypass it’s internal boot ROM at power-on and begin executing code directly from the DSM2150F5V secondary Flash memory. While executing this code, the DSP will load the contents of the DSM2150F5V main Flash memory into the ADSP-21535 internal SRAM, then execute code from that high performance SRAM. The advantage of this is speed, flexibility, IAP, clean software partitioning, and parameter storage. – Loading external Flash memory to internal SRAM by 16-bits is faster than booting by 8bits. Also, subsequent loading of new memory overlays during runtime is also faster by 16bits. – Bypassing internal DSP boot ROM and executing from DSM secondary memory provides total flexibility to meet system requirements. Like having custom boot ROM programmable by JTAG. – In-Application Programming (IAP) can be implemented by placing custom loader code in DSM secondary flash which, when executed, allows the DSP to receive data over any communication channel (i.e. USB) and write new code/data the DSM main flash memory. Since the DSM Flash arrays are independent, it is possible to read from the secondary flash while writing to the main Flash. – Since the DSM secondary Flash has smaller sector sizes, small data sets and calibration constants may be stored there. EEPROM emulation techniques can be used. – Placing start-up and IAP code in DSM secondary Flash keeps it totally separate DSM main flash memory, affording clean software partitioning. This also ensures robust system operaton since start-up code will always be there and removed from accitental WRITEs or erasures of DSM main flash. The nomenclature fs0..fs7 in Figure 11., page 34 are designators for the individual sectors of Main Flash memory, 64 KBytes each. csboot0..csboot3 are designators for the individual Secondary Flash memory segments, 8 KBytes each. csiop designates the DSM control register block. The designer may easily specify memory mapping in a point-and-click software environment using PSDsoft Express™. Specifying the Memory Map with PSDsoft Express™ The memory map shown in Figure 11., page 34 can be easily implemented using PSDsoft Express™ in a point-and-click environment. PSDsoft Express™ will generate Hardware Definition Language (HDL) statements of the ABEL language. Table 12., page 35 shows the resulting equations generated by PSDsoft Express™. Specifying these equations using PSDsoft Express™ is very simple. Figure 12., page 35 shows how to specify the equation for the 64 KByte Flash memory segment, fs0. Notice fs0 is qualified with the signal AMS0. This specification process is repeated for all other Flash memory segments, the csiop register block, and any external chip select signals that may be needed. 33/73 DSM2150F5V Figure 11. Memory Map, ADSP-21535 9FFFF fs7 64K bytes Main Flash 90000 8FFFF fs6 64K bytes Main Flash 80000 7FFFF fs5 64K bytes Main Flash 70000 6FFFF fs4 64K bytes Main Flash 60000 5FFFF fs3 64K bytes Main Flash 50000 4FFFF fs2 64K bytes Main Flash 40000 3FFFF fs1 64K bytes Main Flash 30000 2FFFF fs0 64K bytes Main Flash 20000 Nothing Mapped 10000-100FF csiop, Control Regs Nothing Mapped 06000-07FFF 04000-05FFF 02000-03FFF 00000-01FFF csboot, 8KB 2nd Flash csboot, 8KB 2nd Flash csboot, 8KB 2nd Flash csboot, 8KB 2nd Flash AI05778 34/73 DSM2150F5V Table 12. HDL Statements Generated from PSDsoft Express to Implement Memory Map csiop = ((address >= ^h10000) & (address = ^h20000) & (address = ^h10000) & (address = ^h20000) & (address = ^h30000) & (address = ^h40000) & (address = ^h50000) & (address = ^h60000) & (address = ^h70000) & (address = ^h80000) & (address = ^h90000) & (address = ^h0000) & (address = ^h2000) & (address = ^h4000) & (address = ^h6000) & (address