Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
Future Technology Devices
International Ltd.
FT800
(Embedded Video Engine)
The FT800 is an easy to use graphic
controller targeted for embedded
applications to generate high-quality
Human Machine Interfaces (HMIs) .
It has the following features:
FT800
functionality
includes
graphic
controller, audio processing, and resistive
touch controller.
Embedded Video Engine (EVE) with widget
support can offload the system MPU and
provide a variety of graphic features
Built-in graphics operations allow users with
little expertise to create high-quality display
Integrated
with
4-wire
touch-screen
controller incorporating median filtering and
touch force sensing. Hardware engine can
recognize touch tags and track touch
movement. It provides notification for up to
255 touch tags.
Support for LCD display in WQVGA
(480x272) and QVGA (320x240) formats
with data enable (DE) support mode and
VSYNC/HSYNC mode
The FT800 calculates for 8-bit colour despite
only providing pins for 6-bit (RGB-6,6,6);
this improves the half tone appearance
Display enable control output to LCD panel
Mono audio channel output with PWM output
Built-in sound synthesizer
Audio wave playback for mono 8-bit linear
PCM, 4-bit ADPCM and µ-Law coding format
at sampling frequency from 8kHz to 48kHz.
Built-in digital filter reduces the system
design complexity of external filtering
PWM output for backlight dimming control
for LED
Low power consumption for portable
application, 24mA active (typical) and 250
uA sleep (typical)
No frame buffer RAM required
Advanced
object oriented architecture
enables low cost MPU/MCU as system host
using I2C and SPI interfaces
Standard serial interface to host MPU/MCU
with SPI up to 30MHz or I²C clocking up to
3.4MHz
Programmable interrupt controller provides
interrupts to host MPU/MCU
Built-in 12MHz crystal oscillator with PLL
providing 48MHz or 36MHz system clock
Power mode control allows chip to be put in
power down, sleep and standby states
Video RGB parallel output (default RGB data
width of 6-6-6)
with 2 bit dithering;
configurable to support resolution up to
512x512 and LCD R/G/B data width of 1 to
6
Supports host interface I/O voltage from
1.8V to 3.3V
Internal voltage regulator supplies 1.2V to
the digital core
-40°C
to
85°C
temperature range
Available in a compact Pb-free, VQFN-48,
7mm X 7mm X 0.9mm package, RoHS
compliant
Programmable timing to adjust HSYNC and
VSYNC
timing,
enabling
interface
to
numerous displays
extended
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operating
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
Disclaimer:
Neither the whole nor any part of the information contained in, or the product described in this manual, may be adapted or
reproduced in any material or electronic form without the prior written consent of the copyright holder. This product and its
documentation are supplied on an as-is basis and no warranty as to their suitability for any particular purpose is either made
or implied. Future Technology Devices International Ltd will not accept any claim for damages howsoever arising as a result of
use or failure of this product. Your statutory rights are not affected. This product or any variant of it is not intended for use in
any medical appliance, device or system in which the failure of the product might reasonably be expected to result in persona l
injury. This document provides preliminary information that may be subject to change without notice. No freedom to use
patents or other intellectual property rights is implied by the publication of this document.
Future Technology Devices International Ltd
Unit 1, 2 Seaward Place
Centurion Business Park
Glasgow G41 1HH
United Kingdom
Scotland Registered Company Number: SC136640
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FT800 Embedded Video Engine
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Typical Applications
Point of Sales Machines
Power meter
Multi-function Printers
Home appliance devices
Instrumentation
Set-top box
Home Security Systems
Thermostats
Graphic touch pad – remote, dial pad
Sprinkler system displays
Tele / Video Conference Systems
Medical Appliances
Phones and Switchboards
GPS / SatNav
Medical Appliances
Vending Machine Control Panels
Blood Pressure displays
Elevator Controls
Heart monitors
……and many more
Glucose level displays
Breathalyzers
Gas chromatographs
1.1 Part Numbers
Part Number
Package
FT800Q-x
48 Pin VQFN, pitch 0.5mm, body 7mm x 7mm x 0.9mm
Table 1- Video Controller Part Numbers
Note: Packaging codes for x is:
-R: Taped and Reel, (VQFN in 2500 pieces per reel)
-T: Tray packing, (VQFN in 250 pieces per tray)
For example: FT800Q-R is 2500 VQFN pieces in taped and reel packaging
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FT800 Block Diagram
Figure 2-1 FT800 Block Diagram
For a description of each function please refer to Section 4.
Figure 2-2 FT800 System Design Diagram
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FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
FT800 or EVE (Embedded Video Engine) simplifies the system architecture for advanced human
machine interfaces (HMIs) by providing functionality for display, audio, and touch as well as an
object oriented architecture approach that extends from display creation to the rendering of the
graphics.
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FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
Contents
1
Typical Applications ...............................................................3
1.1
Part Numbers ...............................................................................3
2
FT800 Block Diagram .............................................................4
3
Device Pin Out and Signal Description ...................................8
3.1
VQFN-48 Package Pin Out ............................................................8
3.2
Pin Description ............................................................................9
4
Function Description ............................................................ 14
4.1
Serial Host Interface .................................................................. 14
4.1.1
SPI Interface ................................................................................................... 16
4.1.2
I²C Interface ................................................................................................... 16
4.1.3
Serial Data Protocol .......................................................................................... 16
4.1.4
Host Memory Read ........................................................................................... 16
4.1.5
Host Memory Write .......................................................................................... 17
4.1.6
Host Command ................................................................................................ 17
4.1.7
Interrupts ....................................................................................................... 18
4.2
System Clock ............................................................................. 19
4.2.1
Crystal Oscillator .............................................................................................. 19
4.2.2
Phase Locked Loop ........................................................................................... 20
4.2.3
Clock Enable.................................................................................................... 20
4.2.4
Clock Frequency .............................................................................................. 20
4.3
Graphics Engine ......................................................................... 20
4.3.1
Introduction .................................................................................................... 20
4.3.2
ROM and RAM Fonts ......................................................................................... 21
4.4
Parallel RGB Interface ............................................................... 24
4.5
Miscellaneous Control ................................................................ 26
4.5.1
Backlight Control Pin ........................................................................................ 26
4.5.2
DISP Control Pin .............................................................................................. 26
4.5.3
General Purpose IO pins ................................................................................... 26
4.5.4
Pins Drive Current Control ................................................................................. 26
4.6
Audio Engine .............................................................................. 27
4.6.1
Sound Synthesizer ........................................................................................... 27
4.6.2
Audio Playback ................................................................................................ 29
4.7
Touch-Screen Engine ................................................................. 29
4.8
Power Management ................................................................... 30
4.8.1
Power supply ................................................................................................... 30
4.8.2
Internal Regulator and POR ............................................................................... 31
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FT800 Embedded Video Engine
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4.8.3
5
FT800 Memory Map .............................................................. 36
5.1
6
FT800 Registers ......................................................................... 37
Devices Characteristics and Ratings ....................................41
6.1
Absolute Maximum Ratings ........................................................ 41
6.2
DC Characteristics ...................................................................... 42
6.3
Touch Sense Characteristics ...................................................... 44
6.4
AC Characteristics ...................................................................... 45
6.4.1
System clock ................................................................................................... 45
6.4.2
Host Interface SPI Mode 0 ................................................................................. 45
6.4.3
Host Interface I2C Mode Timing ......................................................................... 46
6.4.4
RGB Video Timing ............................................................................................ 47
7
Application Examples ........................................................... 49
7.1
8
9
Power Modes ................................................................................................... 32
Examples of LCD Interface connection ....................................... 49
Package Parameters ............................................................ 50
8.1
VQFN-48 Package Dimensions ................................................... 50
8.2
Solder Reflow Profile ................................................................. 51
FTDI Chip Contact Information ............................................ 52
Appendix A – References .................................................................... 53
Appendix B - List of Figures and Tables .............................................. 53
Appendix C - Revision History ............................................................. 55
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Device Pin Out and Signal Description
3.1 VQFN-48 Package Pin Out
Figure 3-1 Pin Configuration VQFN-48 (top view)
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Datasheet Version 1.1
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3.2 Pin Description
Table 3-1 FT800Q pin description
Pin
No.
Name
Type
Description
1
AUDIO_L
O
Audio PWM out, push-pull output, 16mA sink/source
current.
Pad powered from pin VCC.
2
GND
P
3
SPI_SCLK/ I2C_SCL
I
Ground
In SPI mode: SPI SCLK input.
In I2C mode: SCL input, need external 1kΩ ~ 4.7kΩ
pull up to VCCIO.
Input pad with Schmitt trigger, 3.3V tolerant.
Pad powered from pin VCCIO.
4
MISO/ I2C_SDA
I/O
In SPI mode: SPI MISO output.
In I2C mode: SDA input/Open Drain Output, need
external1kΩ ~ 4.7kΩ pull up to VCCIO.
Input with Schmitt trigger, 3.3V tolerant, 4/8/12/16mA
sink/source current.
Pad powered from pin VCCIO.
5
MOSI/ I2C_SA0
I
In SPI mode: SPI MOSI input.
In I2C mode: Input, bit 0 of I2C device address.
Input pad, 3.3V tolerant.
Pad powered from pin VCCIO.
6
CS_N/ I2C_SA1
I
In SPI mode: SPI CS_N input, active low.
In I2C mode: Input, bit 1 of I2C device address.
Input pad, 3.3V tolerant.
Pad powered from pin VCCIO.
7
GPIO0/ I2C_SA2
I/O
In SPI mode: General purpose input, output port.
In I2C mode: Input, bit 2 of I2C device address.
Push-pull, three-state output. 3.3V tolerant,
4/8/12/16mA sink/source current.
Pad powered from pin VCCIO.
8
GPIO1
I/O
General purpose input, output port.
Push-pull, three-state output. 3.3V tolerant,
4/8/12/16mA sink/source current.
Pad powered from pin VCCIO.
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Continued
Pin
No.
Name
Type
9
VCCIO
P
Description
I/O power supply, connect a 0.1uF decoupling
capacitor. Support 1.8V, 2.5V or 3.3V.
Note: VCCIO supply to IO pads from pin 3 to 12 only.
10
MODE
I
Host interface SPI(pull low) or I2C(pull up) mode select
input, 3.3V tolerant
Pad powered from pin VCCIO.
11
INT_N
OD
Host Interrupt, open drain output, active low, pull up to
VCCIO through a 1kΩ ~10kΩ resistor.
12
PD_N
I
Power down input, active low, 3.3V tolerant, pull up to
VCCIO through 47kΩ resistor and 100nF to ground.
Pad powered from pin VCCIO.
13
X1/ CLK
I
Crystal oscillator or clock input; Connect to GND if not
used.
3.3V peak input allowed.
Pad powered from pin VCC.
14
X2
O
Crystal oscillator output; leave open if not used.
Pad powered from pin VCC.
15
GND
P
16
VCC
P
17
VCC1V2
O
18
VCC
P
19
X+
AI/O
Ground
3.3V power supply input.
1.2V regulator output pin. Connect a 4.7uF decoupling
capacitor to GND.
3.3V power supply input.
Connect to X right electrode of 4-wire touch-screen
panel.
Pad powered from pin VCC.
20
Y+
AI/O
Connect to Y top electrode of 4-wire touch-screen
panel.
Pad powered from pin VCC.
21
X-
AI/O
Connect to X left electrode of 4-wire touch-screen
panel.
Pad powered from pin VCC.
22
Y-
AI/O
Connect to Y bottom electrode of 4-wire touch-screen
panel.
Pad powered from pin VCC.
23
GND
P
Ground
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Continued
Pin
No.
Name
Type
Description
24
BACKLIGHT
O
LED Backlight brightness PWM control signal, push-pull
output, 4/8mA sink/source current.
Pad powered from pin VCC.
25
DE
O
LCD Data Enable, push-pull output, 4/8mA sink/source
current.
Pad powered from pin VCC.
26
VSYNC
O
LCD Vertical Sync, push-pull output, 4/8mA sink/source
current.
Pad powered from pin VCC.
27
HSYNC
O
LCD Horizontal Sync, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
28
DISP
O
General purpose output pin for LCD Display Enable,
push-pull output, 4/8mA sink/source current. Control
by writing to Bit 7 of REG_GPIO register.
Pad powered from pin VCC.
29
PCLK
O
LCD Pixel Clock, push-pull output, 4/8mA sink/source
current.
Pad powered from pin VCC.
30
B7
O
Bit 7 of Blue RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
31
B6
O
Bit 6 of Blue RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
32
B5
O
Bit 5 of Blue RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
33
B4
O
Bit 4 of Blue RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
34
B3
O
Bit 3 of Blue RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
35
B2
O
Bit 2 of Blue RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
36
GND
P
Ground
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Continued
Pin
No.
Name
Type
Description
37
G7
O
Bit 7 of Green RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
38
G6
O
Bit 6 of Green RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
39
G5
O
Bit 5 of Green RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
40
G4
O
Bit 4 of Green RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
41
G3
O
Bit 3 of Green RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
42
G2
O
Bit 2 of Green RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
43
R7
O
Bit 7 of Red RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
44
R6
O
Bit 6 of Red RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
45
R5
O
Bit 5 of Red RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
46
R4
O
Bit 4 of Red RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
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Continued
Pin No.
Name
Type
Description
47
R3
O
Bit 3 of Red RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
48
R2
O
Bit 2 of Red RGB signals, push-pull output, 4/8mA
sink/source current.
Pad powered from pin VCC.
EP
GND
P
Ground. Exposed thermal pad.
Note:
P
: Power or ground
I
: Input
O
: Output
OD
: Open drain output
I/O
: Bi-direction Input and Output
AI/O
: Analog Input and Output
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Function Description
The FT800 is a single chip, embedded graphic controller with the following function blocks:
Serial Host Interface
System Clock
Graphics Engine
Parallel RGB video interface
Audio Engine
Touch-screen Engine
Power Management
The functions for each block are briefly described in the following subsections.
4.1 Serial Host Interface
The FT800 uses a standard serial interface to communicate with most types of microcontrollers
and microprocessors. The interface mode is configurable by pull down for SPI and pull up for
I²C on pin 10 (MODE). Figure 4-1 shows the two alternative mode connections.
Figure 4-1 Host Interface Options
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Figure 4-2 illustrates a direct connection to a 1.8-3.3V IO MPU/MCU.
1.8-3.3V
3.3V
Vio
MPU/MCU
4.7k
4.7k
VCC
FT800
CS_N
CS_N
MISO
MISO
MOSI
MOSI
SCLK
SCLK
PD_N
PD_N
INT_N
INT_N
GND
GND
Figure 4-2 SPI Interface 1.8-3.3V connection
Figure 4-3 illustrates the FT800 connected to a 5V IO MPU/MCU. The 74LCX125 logic buffer can tolerate
5V signal from the MPU/MCU, and the FT800 input signals are limited to 3.3V.
3.3V
5V
74LCx125
Vio
MPU/MCU
GND
VCC
FT800
CS_N
CS_N
MISO
MISO
MOSI
MOSI
SCLK
SCLK
PD_N
PD_N
INT_N
INT_N
4.7K
3.3V
GND
4.7K
GND
Figure 4-3 SPI Interface 5V connection
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4.1.1 SPI Interface
The SPI slave interface operates up to 30MHz. Only SPI mode 0 is supported. Refer to section
6.4.2 for detailed timing specification.
The SPI interface is selected when the MODE pin is tied to GND.
4.1.2 I²C Interface
The I²C slave interface operates up to 3.4MHz, supporting standard-mode, fast-mode, fastmode plus and high-speed mode. Refer to section 6.4.3for detailed timing specification.
The I²C device address is configurable between 20h to 27h depending on the I²C_SA[2:0] pin
setting, ie the 7-bit I2C slave address is 0b’0100A2A1A0.
The I²C interface is selected when the MODE pin is tied to VCCIO.
4.1.3 Serial Data Protocol
The FT800 appears to the host MPU/MCU as a memory-mapped SPI or I²C device. The host
communicates with the FT800 using reads and writes to a large (4 megabyte) address space.
Within this address space are dedicated areas for graphics, audio and touch control. Refer to
section 5 for the detailed memory map.
The host reads and writes the FT800 address space using SPI or I²C transactions. These
transactions are memory read, memory write and command write. Serial data is sent by the
most significant bit first. For I²C transactions, the same byte sequence is encapsulated in the
I²C protocol.
For SPI operation, each transaction starts with CS_N goes low, and ends when CS_N goes
high. There’s no limit on data length within one transaction, as long as the memory address is
continuous.
4.1.4 Host Memory Read
For SPI memory read transaction, the host sends two zero bits, followed by the 22-bit address.
This is followed by a dummy byte. After the dummy byte, the FT800 responds to each host
byte with read data bytes.
Table 4-1 Host memory read transaction (SPI)
7
6
0
0
5
4
3
2
1
0
Address [21:16]
Address [15:8]
Write
Address
Address [7:0]
Dummy byte
Byte 0
Read Data
Byte n
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For I2C memory read transaction, bytes are packed in the I2C protocol as follow:
[start]
[restart]
....
[stop]
4.1.5 Host Memory Write
For SPI memory write transaction, the host sends a ‘1’ bit and ‘0’ bit, followed by the 22-bit
address. This is followed by the write data.
Table 4-2 Host memory write transaction (SPI)
7
6
1
0
5
4
3
2
1
0
Address [21:16]
Address [15:8]
Write
Address
Address [7:0]
Byte 0
Byte n
Write Data
For I2C memory write transaction, bytes are packed in the I2C protocol as follow:[start]
....
[stop]
4.1.6 Host Command
When sending a command, the host transmits a 3 byte command. Error! Reference source
not found. lists all the host command functions.
Note: ACTIVE command is generated by dummy memory read from address 0 when FT800 is
in sleep or standby mode.
For SPI command transaction, the host sends a ‘0’ bit and ‘1’ bit, followed by the 6-bit
command code. This is followed by 2 bytes 00h.
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Table 4-3 Host command transaction (SPI)
7
6
5
4
3
0
1
0
0
0
0
0
0
0
0
0
0
2
1
0
0
0
0
0
0
0
Command [5:0]
For I2C command transaction, bytes are packed in the I2C protocol as follows:
[start]
[stop]
Table 4-4 Host Command Table
1st Byte
2nd byte
3rd byte
Command
Description
Switch from Standby/Sleep modes to
active mode. Dummy read from address
0 generates ACTIVE command.
Power Modes
00000000b
00000000b
00000000b
00h
ACTIVE
01000001b
00000000b
00000000b
41h
STANDBY
01000010b
00000000b
00000000b
01010000b
00000000b
00000000b
42h
SLEEP
50h
PWRDOWN
Put FT800 core to standby mode. Clock
gate off, PLL and Oscillator remain on
(default).
Put FT800 core to sleep mode. Clock
gate off, PLL and Oscillator off.
Switch off 1.2V internal regulator. Clock,
PLL and Oscillator off.
Clock Switching
01000100b
00000000b
00000000bN
A
44h
CLKEXT
Enable PLL input from Crystal oscillator
or external input clock.
01100010b
00000000b
00000000bN
A
62h
CLK48M
Switch PLL output clock to 48MHz
(default).
01100001b
00000000b
00000000b
61h
CLK36M
Switch PLL output clock to 36MHz.
Miscellaneous
01101000b
00000000b
00000000b
68h
CORERST
Send reset pulse to FT800 core. All
registers and state machines will be
reset.
NOTE: Any command code not specified is reserved and should not be used by the software
4.1.7 Interrupts
The interrupt output pin is enabled by REG_INT_EN. When REG_INT_EN is 0, INT_N is tri-state
(pulled to high by external pull-up resistor). When REG_INT_EN is 1, INT_N is driven low when
any of the interrupt flags in REG_INT_FLAGS are high, after masking with REG_INT_MASK.
Writing a ‘1’ in any bit of REG_INT_MASK will enable the correspond interrupt. Each bit in
REG_INT_FLAGS is set by a corresponding interrupt source. REG_INT_FLAGS is readable by
the host at any time, and clears when read.
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When the FT800 is in sleep mode, a touch event detected on the touch-screen will drive the INT_N pin to
low regardless the setting of REG_INT_EN and REG_INT_MASK. The MCU can use this signal to serve as
a wakeup event.
Table 4-5 Interrupt Flags bit assignment
Bit
7
6
5
4
Interrupt Sources
CONVCOMPLETE
CMDFLAG
CMDEMPTY
PLAYBACK
Conditions
Touch-screen
conversions
completed
Command FIFO
flag
Command FIFO
empty
Audio playback
ended
Bit
3
2
1
0
Interrupt Sources
SOUND
TAG
TOUCH
SWAP
Conditions
Sound effect
ended
Touch-screen tag
value change
Touch-screen
touch detected
Display list swap
occurred
4.2 System Clock
4.2.1 Crystal Oscillator
(Please refer to table 4-4, host command. It is required to enable PLL from crystal or input
clock for normal operationError! Reference source not found.).
The FT800 crystal oscillator generates the input clock for system clock. Either a 12MHz crystal
or a 12MHz square wave clock can be used as clock source. Figure 4-4 and shows the pin
connections for these clock options.
Figure 4-4 Crystal oscillator connection
Copyright © 2013 Future Technology Devices International Limited
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
Figure 4-5 External Clock Input
4.2.2 Phase Locked Loop
The internal PLL takes 12MHz input from the crystal oscillator. The PLL outputs clock to all
internal circuits, including graphics engine, audio engine and touch engine.
4.2.3 Clock Enable
Upon power on the FT800 enters standby mode. The system clock will be enabled when
following steps are executed:
-
Host sends an “ACTIVE” command (dummy read at address 0)
Host sends an “CLKEXT” command
Host writes to REG_PCLK with non-zero value (ie 5)
If SPI is used as host interface, the SPI clock shall not exceed 11MHz before system clock is
enabled. After system clock is properly enabled, the SPI clock is allowed to go up to 30MHz.
4.2.4 Clock Frequency
By default the system clock is 48MHz. Host is allowed to switch the system clock between
48MHz and 36MHz by the host command “CLK48MHz” and “CLK36MHz” respectively. The clock
switching is synchronised to VSYNC edge on the fly. This is to avoid possible graphics glitch
during clock switching. As a result, the clock switch will only take effect if the REG_PCLK is a
non-zero value.
4.3 Graphics Engine
4.3.1 Introduction
The graphics engine executes the display list once for every horizontal line. It executes the
primitive objects in the display list and constructs the display line buffer. The horizontal pixel
content in the line buffer is updated if the object is visible at the horizontal line.
Main features of the graphics engine are:
Copyright © 2013 Future Technology Devices International Limited
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
The primitive objects supported by the graphics processor are: lines, points, rectangles,
bitmaps (comprehensive set of formats), text display, plotting bar graph, edge strips,
and line strips, etc.
Operations such as stencil test, alpha blending and masking are useful for creating a
rich set of effects such as shadows, transitions, reveals, fades and wipes.
Anti-aliasing of the primitive objects (except bitmaps) gives a smoothing effect to the
viewer.
Bitmap transformations enable operations such as translate, scale and rotate.
Display pixels are plotted with 1/16th pixel precision.
Four levels of graphics states
Tag buffer detection
The graphics engine also supports customized build-in widgets and functionalities such as jpeg
decode, screen saver, calibration etc. The graphics engine interprets commands from the MPU
host via a 4 Kbyte FIFO in FT800 memory at RAM_CMD. The MPU/MCU writes commands into
the FIFO, and the graphics engine reads and executes the commands. The MPU/MCU updates
register REG_CMD_WRITE to indicate that there are new commands in the FIFO, and the
graphics engine updates REG_CMD_READ after commands have been executed.
Main features supported are:
Drawing of widgets such as buttons, clock, keys, gauges, text displays, progress bars,
sliders, toggle switches, dials, gradients, etc.
JPEG decode (Only baseline is supported)
Inflate functionality (zlib inflate is supported)
Timed interrupt (generate an interrupt to host processor after a specified number of
milliseconds)
In built animated functionalities such as displaying logo, calibration, spinner, screen
saver and sketch
Snapshot feature to capture the current graphics display
For a complete list of graphics engine display commands and widgets refer to FT800
Programmer Guide [FTDI Document FT_000793], Chapter 4.
4.3.2 ROM and RAM Fonts
The FT800 has built in ROM character bitmaps as font metrics. The graphics engine can use
these metrics when drawing text fonts. There are total 16 ROM fonts, numbered with font
handle 16-31. The user can define and load customized font metrics into RAM_G, which can be
used by display command with handle 0-15.
Each font metric block has a 148 byte font table which defines the parameters of the font and
the pointer of font image. The font table format is shown in Table 4-6.
Table 4-6 Font table format
Address Offset
0
128
132
136
140
144
Size(byte)
128
4
4
4
4
4
Parameter Description
width of each font character, in pixels
font bitmap format, for example L1, L4 or L8
font line stride, in bytes
font width, in pixels
font height, in pixels
pointer to font image data in memory
The ROM fonts are stored in the memory space ROM_FONT. The ROM font table is also stored
in the ROM. The starting address of ROM font table for font index 16 is stored at
ROM_FONT_ADDR, with other font tables follow. The ROM font table and individual character
width (in pixel) are listed in Table 4-7 through Table 4-9.
Copyright © 2013 Future Technology Devices International Limited
21
Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
Table 4-7 ROM font table
Font Index
Font format
Line stride
Font width
Font height
16
L1
1
8
8
17
L1
1
8
8
18
L1
1
8
16
19
L1
1
8
16
20
L1
2
10
13
21
L1
2
13
17
22
L1
2
14
20
23
L1
3
17
22
24
L1
3
24
29
25
L1
4
30
38
26
L4
6
12
16
27
L4
8
16
20
28
L4
9
18
25
29
L4
11
22
28
30
L4
14
28
36
31
L4
18
36
49
Image pointer
start address
(hex)
FFBFC
FF7FC
FEFFC
FE7FC
FDAFC
FCD3C
FBD7C
FA17C
F7E3C
F3D1C
F201C
EDC1C
E7F9C
E01BC
D2C3C
BB23C
22
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
5
6
9
9
14
11
3
6
6
23
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
6
5
10
10
16
13
3
6
6
24
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
6
6
8
14
13
22
17
6
8
8
25
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
9
9
12
19
18
29
22
6
11
11
26
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3
4
5
9
8
10
9
3
5
5
27
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
4
6
11
10
12
11
4
6
6
28
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
6
8
13
12
15
13
5
7
7
29
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
6
6
9
15
14
18
15
5
8
8
30
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
8
8
11
19
18
23
19
7
11
10
31
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
10
11
15
26
24
31
26
9
14
14
Table 4-8 ROM font character width (1)
ASCII Character width in pixels
Font Index
0
NULL
1
SOH
2
STX
3
ETX
4
EOT
5
ENQ
6
ACK
7
BEL
8
BS
9
HT
10
LF
11
VT
12
FF
13
CR
14
SO
15
SI
16
DLE
17
DC1
18
DC2
19
DC3
20
DC4
21
NAK
22
SYN
23
ETB
24
CAN
25
EM
26
SUB
27
ESC
28
FS
29
GS
30
RS
31
US
32 space
33
!
34
"
35
#
36
$
37
%
38
&
39
'
40
(
41
)
16
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
17
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
18
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
19
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
20
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3
3
4
6
6
9
8
2
4
4
21
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
4
5
8
8
12
10
3
5
5
Copyright © 2013 Future Technology Devices International Limited
22
Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
Font Index
42
*
43
+
44
,
45
46
.
47
/
48
0
49
1
50
2
51
3
52
4
53
5
54
6
55
7
56
8
57
9
58
:
59
;
60
<
61
=
62
>
63
?
16
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
17
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
18
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
19
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
20
4
6
3
4
3
3
6
6
6
6
6
6
6
6
6
6
3
3
6
5
6
6
21
7
9
3
4
3
4
8
8
8
8
8
8
8
8
8
8
3
4
8
9
8
8
22
6
10
4
5
4
5
9
9
9
9
9
9
9
9
9
9
4
4
10
10
10
9
23
7
10
5
6
5
5
10
10
10
10
10
10
10
10
10
10
5
5
10
11
10
10
22
17
11
11
12
12
11
10
13
12
4
8
11
9
13
12
13
11
13
12
11
10
12
11
15
11
11
10
5
5
5
8
23
18
13
13
14
14
13
12
15
14
6
10
13
11
16
14
15
13
15
14
13
12
14
13
18
13
13
12
5
5
5
9
24
10
14
6
8
6
7
13
13
13
13
13
13
13
13
13
13
6
6
15
15
15
12
25
13
19
9
11
9
9
18
18
18
18
18
18
18
18
18
18
9
9
19
19
19
18
26
6
8
3
6
4
6
8
8
8
8
8
8
8
8
8
8
4
4
7
8
7
7
25
34
22
22
24
24
22
20
25
24
9
16
22
18
27
24
25
22
26
24
22
20
24
22
31
22
22
20
9
9
9
16
26
13
9
9
9
9
8
8
9
10
4
8
9
8
12
10
10
9
10
9
9
9
9
12
9
9
8
4
6
4
6
7
27
7
10
4
8
5
7
10
10
10
10
10
10
10
10
10
10
4
4
9
10
9
8
28
9
12
5
9
6
9
12
12
12
12
12
12
12
12
12
12
5
5
11
12
11
10
29
10
14
5
11
6
10
14
14
14
14
14
14
14
14
14
14
6
6
12
14
13
11
28
19
13
13
13
14
12
12
14
15
6
12
14
12
18
15
14
13
15
13
13
13
14
14
18
13
13
13
6
9
6
9
29
21
15
15
15
16
13
13
16
17
7
13
15
13
21
17
16
15
17
15
15
14
16
15
21
15
15
14
7
10
6
10
30
13
18
7
14
8
13
17
17
17
17
17
17
17
17
17
17
8
8
16
17
16
15
31
18
24
9
19
11
17
24
24
24
24
24
24
24
24
24
24
11
11
21
24
22
20
Table 4-9 ROM font character width (2)
ASCII Character width in pixels
Font Index
64
@
65
A
66
B
67
C
68
D
69
E
70
F
71
G
72
H
73
I
74
J
75
K
76
L
77
M
78
N
79
O
80
P
81
Q
82
R
83
S
84
T
85
U
86
V
87
W
88
X
89
Y
90
Z
91
[
92
\
93
]
94
^
16
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
17
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
18
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
19
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
20
11
7
7
8
8
7
6
8
8
3
5
7
6
9
8
8
7
8
7
7
5
8
7
9
7
7
7
3
3
3
6
21
13
9
9
10
10
9
8
11
10
4
7
9
8
12
10
11
9
11
10
9
9
10
9
13
9
9
9
4
4
4
7
24
25
17
17
18
18
16
14
19
18
8
13
18
14
21
18
18
16
18
17
16
16
18
17
22
17
16
15
7
7
7
12
27
15
11
11
11
12
9
9
12
12
5
9
11
9
15
12
12
11
12
11
10
10
12
11
15
11
11
10
5
7
5
7
Copyright © 2013 Future Technology Devices International Limited
30
28
20
20
20
21
17
17
21
22
9
17
20
17
27
22
21
20
22
20
19
19
21
20
27
20
20
19
8
13
8
13
31
38
27
27
27
28
23
23
28
30
12
23
27
23
36
30
29
27
29
27
26
25
28
27
36
27
27
25
11
18
11
18
23
Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
Font Index
95
_
96
`
97
a
98
b
99
c
100
d
101
e
102
f
103
g
104
h
105
i
106
j
107
k
108
l
109
m
110
n
111
o
112
p
113
q
114
r
115
s
116
t
117
u
118
v
119
w
120
x
121
y
122
z
123
{
124
|
125
}
126
~
127 DEL
16
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
17
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
18
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
19
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
20
6
3
5
6
5
6
5
4
6
6
2
2
5
2
8
6
6
6
6
4
5
4
5
6
8
6
5
5
3
3
3
7
0
21
8
5
8
7
7
8
8
4
8
8
3
3
7
3
11
8
8
8
8
5
7
4
7
7
10
7
7
7
5
3
5
8
0
22
9
6
9
9
8
9
9
5
9
9
3
4
8
3
14
9
9
9
9
5
8
5
9
8
12
8
8
8
6
4
6
10
0
23
11
4
11
11
10
11
10
6
11
10
4
4
9
4
16
10
11
11
11
6
9
6
10
10
14
10
10
9
6
5
6
10
0
24
14
7
13
14
12
14
13
8
14
13
6
6
12
6
20
14
13
14
14
9
12
8
14
13
18
12
13
12
8
6
8
14
0
25
18
11
18
18
16
18
18
9
18
18
7
7
16
7
27
18
18
18
18
11
16
9
18
16
23
16
16
16
11
9
11
19
0
26
4
8
8
7
8
7
5
8
8
4
4
8
4
12
8
8
8
8
5
7
5
8
7
11
7
7
7
5
3
5
10
3
2
27
8
5
9
10
9
10
9
6
10
10
4
4
9
4
15
10
10
10
10
6
9
6
10
9
13
9
9
9
6
4
6
12
4
28
10
7
12
12
11
12
11
8
12
12
5
5
11
5
18
12
12
12
12
7
11
7
12
11
16
11
11
11
7
5
7
14
5
29
11
8
13
14
13
14
13
9
14
14
6
6
13
6
21
14
14
14
14
8
13
8
14
12
18
12
12
12
8
6
8
16
6
30
15
10
17
18
16
18
16
11
18
18
8
8
16
8
27
18
18
18
18
11
16
10
18
16
23
16
16
16
11
8
11
21
8
31
20
13
23
24
22
24
22
15
24
24
11
11
22
11
37
24
24
24
24
15
22
13
24
21
32
21
21
21
14
10
14
29
10
4.4 Parallel RGB Interface
The RGB parallel interface consists of 23 signals - DISP, PCLK, VSYNC, HSYNC, DE, 6 signals
each for R, G and B.
Several registers configure the LCD operation of these signals as follow:
REG_PCLK is the PCLK divisor the default is 0, and disables the PCLK output.
PCLK frequency = System Clock frequency / REG_PCLK
PCLK_POL define the clock polarity, =0 for positive active clock edge, and 1 for negative clock
edge.
REG_CSPREAD controls the transition of RGB signals with respect to PCLK active clock edge.
When REG_CSPREAD=0, R[7:2],G[7:2] and B[7:2] signals change following the active edge of
PCLK. When REG_CSPREAD=1, R[7:2] changes a PCLK clock early and B[7:2] a PCLK clock
later, which helps reduce the switching noise.
REG_DITHER enables colour dither; the default is enabled. This option improves the half-tone
appearance on displays. Internally, the graphics engine computes the colour values at an 8 bit
precision; however, the LCD colour at a lower precision is sufficient. The FT800 output is only 6
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bits per colour in 6:6:6 formats and a 2X2 dither matrix allow the truncated bits to contribute
to the final colour values.
REG_OUTBITS gives the bit width of each colour channel, the default is 6, 6, 6 bits for each
RGB colour. A lower value means fewer bits are output for each channel allowing dithering on
lower precision LCD displays.
REG_SWIZZLE controls the arrangement of the output colour pins, to help the PCB route
different LCD panel arrangements. Bit 0 of the register causes the order of bits in each colour
channel to be reversed. Bits 1-3 control the RGB order. Setting Bit 1 causes R and B channels
to be swapped. Setting Bit 3 allows rotation to be enabled. If Bit 3 is set, then (R,G,B) is
rotated right if bit 2 is one, or left if bit 2 is zero.
Table 4-10 REG_SWIZZLE RGB Pins Mapping
REG_SWIZZLE
b3 b2 b1 b0
0
0
0
0
1
1
1
1
1
1
1
1
X
X
X
X
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
R7, R6, R5,
R4, R3, R2
R[7:2]
R[2:7]
B[7:2]
B[2:7]
G[7:2]
G[2:7]
G[7:2]
G[2:7]
B[7:2]
B[2:7]
R[7:2]
R[2:7]
PINS
G7, G6, G5,
G4, G3, G2
G[7:2]
G[2:7]
G[7:2]
G[2:7]
B[7:2]
B[2:7]
R[7:2]
R[2:7]
R[7:2]
R[2:7]
B[7:2]
B[2:7]
B7, B6, B5, B4,
B3, B2
B[7:2]
B[2:7]
R[7:2]
R[2:7]
R[7:2]
R[2:7]
B[7:2]
B[2:7]
G[7:2]
G[2:7]
G[7:2]
G[2:7]
Power on Default
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4.5 Miscellaneous Control
4.5.1 Backlight Control Pin
The backlight control pin is a pulse width modulated (PWM) signal controlled by two registers:
REG_PWM_HZ and REG_PWM_DUTY. REG_PWM_HZ specifies the PWM output frequency, the
range is 250-10000 Hz. REG_PWM_DUTY specifies the duty cycle; the range is 0-128. A value
of 0 means that the PWM is completely off and 128 means completely on.
4.5.2 DISP Control Pin
The DISP pin is a general purpose output that can be used to enable or as a reset control to LCD display
panel. The pin is controlled by writing to Bit 7 of REG_GPIO register.
4.5.3 General Purpose IO pins
The GPIO1 and GPIO0 pins are default inputs. Write '1' to Bit 1 and 0 of REG_GPIO_DIR to change to
output pins respectively. In I²C mode the GPIO0 is used as SA2 and is not available as GPIO.
GPIO1 and GPIO0 are read from or write to bit 1 and 0 of REG_GPIO register. GPIO1 is recommended to
be used as shutdown control for audio power amplifier.
4.5.4 Pins Drive Current Control
The output drive current of output pins can be changed as per the following table by writing to bit[6:2] of
REG_GPIO register:
Table 4-11 Output drive current selection
REG_GPIO
Bit[6:5]
Bit[4]
Bit[3:2]
Value
00b#
01b
10b
11b
0b#
1b
00b#
01b
10b
11b
Drive
Current
4mA
8mA
12mA
16mA
4mA
8mA
4mA
8mA
12mA
16mA
Pins
GPIO1
PCLK
MISO
GPIO0
DISP
INT_N
VSYNC
HSYNC
DE
R7..R2
G7..G2
B7..B2
BACKLIGHT
Note: #Default value
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4.6 Audio Engine
FT800 provides mono audio output through a PWM output pin, AUDIO_L. It outputs the two
audio sources, the sound synthesizer and audio file playback.
4.6.1 Sound Synthesizer
A sound processor, AUDIO ENGINE, generates the sound effects from a small ROM library of
waves table. To play a sound effect listed in Table 4.3, load the REG_SOUND register with a
code value and write 1 to the REG_PLAY register. The REG_PLAY register reads 1 while the
effect is playing and returns a ‘0’ when the effects end. Some sound effects play continuously
until it is interrupted or commanded to play the next sound effect. To interrupt an effect, write
a new value to REG_SOUND and REG_PLAY registers; e.g. write 0 (Silence) to REG_SOUND
and 1 to PEG_PLAY to stop the sound effect.
The sound volume is controlled by register REG_VOL_SOUND. The 16-bit REG_SOUND register
takes an 8-bit sound in the low byte. For some sounds, marked "pitch adjust" in the table
below, the high 8 bits contain a MIDI note value. For these sounds, note value of zero
indicates middle C. For other sounds the high byte of REG_SOUND is ignored.
Table 4-12 Sound Effect
Value
Effect
Conti
nuous
Y
00h
Silence
Y
01h
square wave
Y
02h
sine wave
Y
03h
sawtooth wave
Y
04h
triangle wave
Y
05h
Beeping
Y
06h
Alarm
Y
07h
Warble
Y
08h
Carousel
N
10h
1 short pip
N
11h
2 short pips
N
12h
3 short pips
N
13h
4 short pips
N
14h
5 short pips
15h
16h
17h
18h
19h
1Ah
1Bh
1Ch
1Dh
1Eh
1Fh
6 short pips
7 short pips
8 short pips
9 short pips
10 short pips
11 short pips
12 short pips
13 short pips
14 short pips
15 short pips
16 short pips
23h
2Ch
30h
31h
DTMF #
DTMF *
DTMF 0
DTMF 1
N
N
N
N
N
N
N
N
N
N
N
Y
Y
Y
Y
Pitch
adjust
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Value
Effect
32h
33h
34h
35h
36h
37h
38h
39h
40h
41h
42h
43h
44h
DTMF 2
DTMF 3
DTMF 4
DTMF 5
DTMF 6
DTMF 7
DTMF 8
DTMF 9
harp
xylophone
tuba
glockenspiel
organ
Y
45h
trumpet
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
46h
47h
48h
49h
50h
51h
52h
53h
54h
55h
56h
piano
chimes
music box
bell
click
switch
cowbell
notch
hihat
kickdrum
pop
N
N
N
N
57h
58h
60h
61h
clack
chack
mute
unmute
Conti
nuous
Y
Y
Y
Y
Y
Y
Y
Y
N
N
N
N
N
N
Pitch
adjust
N
N
N
N
N
N
N
N
Y
Y
Y
Y
Y
N
N
N
N
N
N
N
N
N
N
N
N
Y
Y
Y
Y
N
N
N
N
N
N
N
N
N
N
N
N
N
N
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Y
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Table 4-13 MIDI
MIDI
ANSI
note
note
21
A0
22
A#0
23
B0
24
C1
25
C#1
26
D1
27
D#1
28
E1
29
F1
30
F#1
31
G1
32
G#1
33
A1
34
A#1
35
B1
36
C2
37
C#2
38
D2
39
D#2
40
E2
41
F2
42
F#2
43
G2
44
G#2
45
A2
46
A#2
47
B2
48
C3
49
C#3
50
D3
51
D#3
52
E3
53
F3
54
F#3
55
G3
56
G#3
57
A3
58
A#3
59
B3
60
C4
61
C#4
62
D4
63
D#4
64
E4
Note Effect
Freq
(Hz)
27.5
29.1
30.9
32.7
34.6
36.7
38.9
41.2
43.7
46.2
49.0
51.9
55.0
58.3
61.7
65.4
69.3
73.4
77.8
82.4
87.3
92.5
98.0
103.8
110.0
116.5
123.5
130.8
138.6
146.8
155.6
164.8
174.6
185.0
196.0
207.7
220.0
233.1
246.9
261.6
277.2
293.7
311.1
329.6
MIDI
note
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
ANSI
note
F4
F#4
G4
G#4
A4
A#4
B4
C5
C#5
D5
D#5
E5
F5
F#5
G5
G#5
A5
A#5
B5
C6
C#6
D6
D#6
E6
F6
F#6
G6
G#6
A6
A#6
B6
C7
C#7
D7
D#7
E7
F7
F#7
G7
G#7
A7
A#7
B7
C8
Freq (Hz)
349.2
370.0
392.0
415.3
440.0
466.2
493.9
523.3
554.4
587.3
622.3
659.3
698.5
740.0
784.0
830.6
880.0
932.3
987.8
1046.5
1108.7
1174.7
1244.5
1318.5
1396.9
1480.0
1568.0
1661.2
1760.0
1864.7
1975.5
2093.0
2217.5
2349.3
2489.0
2637.0
2793.8
2960.0
3136.0
3322.4
3520.0
3729.3
3951.1
4186.0
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4.6.2 Audio Playback
The FT800 can play back recorded sound through its audio output. To do this, load the original
sound data into the FT800’s RAM, and set registers to start the playback.
The registers controlling audio playback are:
REG_PLAYBACK_START:
the start address of the audio data
REG_PLAYBACK_LENGTH:
the length of the audio data, in bytes
REG_PLAYBACK_FREQ:
the playback sampling frequency, in Hz
REG_PLAYBACK_FORMAT:
the playback format, one of LINEAR SAMPLES, uLAW
SAMPLES, or ADPCM SAMPLES
REG_PLAYBACK_LOOP:
if zero, sample is played once. If one, sample is repeated
indefinitely
REG_PLAYBACK_PLAY:
a write to this location triggers the start of audio playback,
regardless of writing ‘0’ or ‘1’. Read back ‘1’ when playback
is ongoing, and ‘0’ when playback finishes
REG_VOL_PB:
playback volume, 0-255
The mono audio format supported is 8-bits PCM, 8-bits uLAW and 4-bits IMA-ADPCM. For
ADPCM_SAMPLES, each sample is 4 bits, so two samples are packed per byte, first sample is in
bits 0-3 and the second is in bits 4-7.
The current audio playback read pointer can be queried by reading
the
REG_PLAYBACK_READPTR. Using a large sample buffer, looping, and this read pointer, the
host MPU/MCU can supply a continuous stream of audio.
4.7 Touch-Screen Engine
The touch-screen consists of touch screen engine, ADC, Axis-switches, and ADC input
multiplexer. The touch screen engine reads commands from the memory map register and
generates the required control signals to the axis-switches and inputs mux and ADC. The ADC
data are acquired and processed and update in the respective register for the MPU/MCU to
read.
Y+
FT800
X+
Y+
XY-
X-
LCD Touch Screen
X+
Y-
Figure 4-6 Touch screen connection
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The host controls the TOUCH SCREEN ENGINE operation mode by writing the
REG_TOUCH_MODE.
Table 4-14 Touch Controller Operating Mode
REG_TOUCH_MODE
Mode
Description
0
OFF
Acquisition stopped, only touch detection interrupt is still valid.
1
ONE-SHOT
Perform acquisition once every time MPU write '1' to
REG_TOUCH_MODE.
2
FRAME-SYNC
Perform acquisition for every frame sync (~60 data
acquisition/second.
3
CONTINUOUS
Perform acquisition continuously at approximately 1000 data
acquisition / second.
The Touch Screen Engine captures the raw X and Y coordinate and writes to register
REG_TOUCH_RAW XY. The range of these values is 0-1023. If the touch screen is not being
pressed, both registers read 65535 (FFFFh).
These touch values are transformed into screen coordinates using the matrix in registers
REG_TOUCH_TRANSFORM_A-F. The post-transform coordinates are available in register
REG_TOUCH_SCREEN_XY. If the touch screen is not being pressed, both registers read -32768
(8000h). The values for REG TOUCH TRANSFORM A-F may be computed using an on-screen
calibration process.
If the screen is being touched, the screen coordinates are looked up in the screen's tag buffer,
delivering a final 8-bit tag value, in REG TOUCH TAG. Because the tag lookup takes a full
frame, and touch coordinates change continuously, the original (x; y) used for the tag lookup
is also available in REG_TOUCH_TAG_XY.
Screen touch pressure is available in REG_TOUCH_RZ. The value is relative to the resistance of
the touch contact, a lower value indicates more pressure. The register defaults to 32767 when
touch is not detected. The REG_TOUCH_THRESHOLD can be set to accept a touch only when
the force threshold is exceeded.
4.8 Power Management
4.8.1 Power supply
The FT800 may be operated with a single supply of 3.3V apply to VCC and VCCIO pins. For
operation with host MPU/MCU at lower supply, connect the VCCIO to MPU power to match the
interface power.
Table 4-15 Power supply
Symbol
Typical
Description
VCCIO
1.8V, or 2.5V, or 3.3V
Supply for Host interface digital I/O
pad only, LCD RGB interface supply
from VCC.
VCC
3.3V
Supply for chip
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4.8.2 Internal Regulator and POR
The 1.2V internal regulator provides power to the core circuit. The regulator is disabled when
device is in POWERDOWN state. Power down is activated either by the SCU command write or
by holding down the PD_N pin for at least 5mS to allow the 1.2V decoupling capacitor to
discharge fully. The regulator is enabled only by releasing the PD_N pin. A 47kΩ resistor is
recommended to pull the PD_N pin up to VCCIO, together with a 100nF capacitor to ground in
order to delay the 1.2V regulator powering up after the VCC and VCCIO are stable.
The 1.2V internal regulator requires a compensation capacitor to be stable. A typical design
puts a 4.7uF capacitor with ESR >0.5Ω is required between VCC1V2 to GND pins. Do not
connect any load to this pin.
The 1.2V regulator will generate Power-On-Reset (POR) pulse when the output voltage rises
above the POR threshold. The POR will reset all the core digital circuits.
It is possible to use PD_N pin as an asynchronous hardware reset input. Drive PD_N low for at
least 5ms and then drive it high will reset the FT800 chip.
VCC
R
VCC
47k
Cin
C
10uF
100nF
GND
1.2V
VCC1V2
Ccomp
FT800
4.7uF
GND
GND
PD_N
GND
VCCIO
GND
Figure 4-7 1.2V regulator
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4.8.3 Power Modes
When supply to VCCIO and VCC is applied, internal 1.2V regulator is powered by VCC. An
internal POR pulse will be generated during the regulator power up until it is stable. After the
initial power up, the FT800 will stay in STANDBY state. When needed, host can set FT800 to
ACTIVE state by performing a dummy read to address 0. The graphics engine, the audio
engine and the touch engine are only functional in ACTIVE state. To save power host can send
command to put FT800 into any of the low power mode: STANDBY, SLEEP and POWERDOWN.
In addition, host is allowed to put FT800 in POWERDOWN mode by drive PD_N pin to low,
regardless what current state it is in. Refer to Error! Reference source not found.Figure 4-8
for the power state transitions.
Toggle PD_N from high
to low
VCC/VCCIO
Power ON
Toggle PD_N from low
to high
POWERDOWN
STANDBY
Dummy Read “0”
Write command “POWERDOWN”
Toggle PD_N from high to low or
Toggle PD_N from high
to low
Write command
“STANDBY”
Dummy Read “0”
SLEEP
ACTIVE
Write command “SLEEP”
Figure 4-8 Power State Transition
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4.8.3.1 ACTIVE state
In ACTIVE state, the FT800 is in normal operation. The crystal oscillator and PLL are
functioning. The system clock applied to the FT800 core engines is enabled.
4.8.3.2 STANDBY state
In STANDBY state, the crystal oscillator and PLL remain functioning; the system clock
applied to the FT800 core engines is disabled. All register contents are retained.
4.8.3.3 SLEEP state
In SLEEP state, the crystal oscillator, PLL and system clock applied to the FT800 core
engines are disabled. All register contents are retained.
4.8.3.4 POWERDOWN state
In POWERDOWN state, the internal 1.2V regulator supplying the core digital logic, the
crystal oscillator, the PLL and the system clock applied to the FT800 core is disabled. All
register contents are lost and reset to default when the chip is next switched on.
4.8.3.5 Wake up to ACTIVE from other power states
Wake up from POWERDOWN state requires the host to pull the PD_N pin down and
release, a low to high transition enables the 1.2V regulator. POR generated when 1.2V
is stable and FT800 will switch to STANDBY mode after internal oscillator and PLL are up
(maximum 20ms from PD_N rising edge). The clock enable sequence mentioned in
section 4.2.3 shall be executed to proper enable the system clock.
From SLEEP state, host MPU reads at memory address 0 to wake the FT800 into
ACTIVE state. Host needs to wait for at least 20ms before accessing any registers or
commands. This is to guarantee the crystal oscillator and PLL are up and stable.
From STANDBY state, host MPU reads at memory address 0 to wake the FT800 into ACTIVE state.
Host can immediately access any register or command.
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4.8.3.6 Pin Status at Different Power States
The FT800 pin status depends on the power state of the chip. See the following table
for more details. At power transition from ACTIVE to STANDBY or ACTIVE to SLEEP, all
pins retain their previous status. The software needs to set AUDIO_L, BACKLIGHT and
PCLK to a known state before issuing power transition commands.
Table 4-16 Pin Status
Pin Name
Reset State
Reset State
(VCC / VCCIO ON) Default
Output Drive Strength
Active/Standb
y/Sleep state
(VCC / VCCIO
ON)
Powerdown
state (VCC ON /
VCC1.2 OFF)
(VCC / VCCIO
ON)
AUDIO_L
Tristate Output
(hi-Z)
16mA
Output
Retain previous
state
SPI_SCLK/
I2C_SCL
Input (floating)
MISO/I2C
_SDA
Tristate Output
(hi-Z)
MOSI/I2C
_SA0
Hybrid Mode
(VCC OFF /
VCCIO ON)
Input
Input (floating)
Input/Output
Tristate Output
(hi-Z)
Input (floating)
Input
Input (floating)
CS_N/I2C
_SA1
Input (floating)
Input
Input (floating)
GPIO0/I2C
_SA2
Input (floating)
Input/Output
Tristate Output
(hi-Z)
GPIO1
Tristate Output
(hi-Z)
Input/Output
Tristate Output
(hi-Z)
MODE
Input
Input
Input (floating)
INT_N
Open Drain
Output (hi-Z)
Open Drain
Output
Tristate Output
(hi-Z)
PD_N
Input
Input
Input (floating)
X1/CLK
Input (floating)
Crystal
Oscillator
Input CLK
Input
Note: If
applicable,
external clock on
X1/CLK pin
should be
removed
X2
Output (hi-Z)
Crystal
Oscillator
Output
4mA
4mA
4mA
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Datasheet Version 1.1
Clearance No.: FTDI# 334
Continued
Pin Name
Reset State
(VCC/VCCIO ON)
X+
Reset State
(VCC/VCCIO ON)
Default Output
Drive
Active/Standby/
Sleep state
(VCC/VCCIO ON)
Powerdown state
(VCC ON/VCC1.2
OFF)
Tristate Output
(hi-Z)
Input/Output
Retain Previous
State
Y+
Tristate Output
(hi-Z)
Input/Output
Retain Previous
State
X-
Tristate Output
(hi-Z)
Input/Output
Retain Previous
State
Y-
Tristate Output
(hi-Z)
Input/Output
Retain Previous
State
BACKLIGHT
Output
4mA
Output
Retain Previous
State
DE
Output
4mA
Output
Output Low
VSYNC
Output
4mA
Output
Output Low
HSYNC
Output
4mA
Output
Output Low
DISP
Output
4mA
Output
Output Low
PCLK
Output
4mA
Output
Output Low
R(7:2), G(7:2),
B(7:2)
Output
4mA
Output
Output Low
Copyright © 2013 Future Technology Devices International Limited
Hybrid Mode
(VCC OFF/VCCIO
ON)
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Datasheet Version 1.1
Clearance No.: FTDI# 334
5
FT800 Memory Map
All memory and registers in the FT800 core are memory mapped in 22-bits address space with
2-bits SPI/I2C command prefix. Prefix 0'b00 for read and 0'b10 for write to the address space,
0'b01 reserved for Host Commands and 0'b11 undefined. The following are the memory space
defined.
Table 5-1 FT800 Memory Map
Start
Address
End
Address
Size
NAME
00 0000h
03 FFFFh
256 kB
RAM_G
0C 0000h
0C 0003h
4B
ROM_CHIPID
Description
Main graphics RAM
FT800 chip identification and revision
information:
Byte [0:1] Chip ID: “0800”
Byte [2:3] Version ID: “0100”
0B B23Ch
0F FFFBh
275 kB
ROM_FONT
Font table and bitmap
0F FFFCh
0F FFFFh
4B
ROM_FONT_ADDR
Font table pointer address
10 0000h
10 1FFFh
8 kB
RAM_DL
Display List RAM
10 2000h
10 23FFh
1 kB
RAM_PAL
Palette RAM
10 2400h
10 257Fh
380 B
REG_*
Registers
10 8000 h
10 8FFFh
4 kB
RAM_CMD
Command Buffer
NOTE: The addresses beyond this table are reserved and shall not be read or written.
Copyright © 2013 Future Technology Devices International Limited
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
5.1 FT800 Registers
Table 5.1 shows the complete list of the FT800 registers. Refer to “FT800 Programmer
Guide” (FTDI Doc FT_000793) Chapter 2 for details of the register function.
Table 5-2 Overview of FT800 Registers
Address
102400h
Register Name
REG_ID
Bit
s
Acce
ss
Reset
value
Description
8
r/o
7Ch
Identification register, always reads as
7Ch
102404h
REG_FRAMES
32
r/o
00000000h
Frame counter, since reset
102408h
REG_CLOCK
32
r/o
00000000h
Clock cycles, since reset
10240Ch
REG_FREQUENCY
27
r/w
02DC6C00h
Main clock frequency
102410h
REG_RENDERMODE
1
r/w
00h
Rendering mode:
0 = normal, 1 = single-line
102414h
REG_SNAPY
9
r/w
00h
Scan line select for RENDERMODE 1
102418h
REG_SNAPSHOT
1
r/o
-
10241Ch
REG_CPURESET
1
r/w
00h
102420h
REG_TAP_CRC
32
r/o
-
102424h
REG_TAP_MASK
32
r/w
FFFFFFFFh
102428h
REG_HCYCLE
10
r/w
224h
Horizontal total cycle count
10242Ch
REG_HOFFSET
10
r/w
02Bh
Horizontal display start offset
102430h
REG_HSIZE
10
r/w
1E0h
Horizontal display pixel count
102434h
REG_HSYNC0
10
r/w
000h
Horizontal sync fall offset
102438h
REG_HSYNC1
10
r/w
029h
Horizontal sync rise offset
10243Ch
REG_VCYCLE
10
r/w
124h
Vertical total cycle count
102440h
REG_VOFFSET
10
r/w
00Ch
Vertical display start offset
102444h
REG_VSIZE
10
r/w
110h
Vertical display line count
102448h
REG_VSYNC0
10
r/w
000h
Vertical sync fall offset
10244Ch
REG_VSYNC1
10
r/w
00Ah
Vertical sync rise offset
102450h
REG_DLSWAP
2
r/w
00h
Display list swap control
102454h
REG_ROTATE
1
r/w
00h
Screen 180 degree rotate
102458h
REG_OUTBITS
9
r/w
1B6h
trigger for RENDERMODE 1
Graphics, audio and touch engines
reset control
Live video tap crc. Frame CRC is
computed every DL SWAP.
Live video tap mask
Output bit resolution, 3x3x3 bits
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
Address
Register Name
Bit
s
Acce
ss
Reset
value
Description
10245Ch
REG_DITHER
1
r/w
1
Output dither enable
102460h
REG_SWIZZLE
4
r/w
00h
102464h
REG_CSPREAD
1
r/w
1
Output clock spreading enable
102468h
REG_PCLK_POL
1
r/w
0
PCLK polarity:
Output RGB signal swizzle
0 = output on PCLK rising edge,
1 = output on PCLK falling edge
10246Ch
REG_PCLK
8
r/w
00h
PCLK frequency divider, 0 = disable
102470h
REG_TAG_X
9
r/w
000h
Tag query X coordinate
102474h
REG_TAG_Y
9
r/w
000h
Tag query Y coordinate
102478h
REG_TAG
8
r/o
00h
Tag query result
10247Ch
REG_VOL_PB
8
r/w
FFh
Volume for playback
102480h
REG_VOL_SOUND
8
r/w
FFh
Volume for synthesizer sound
102484h
REG_SOUND
16
r/w
0000h
102488h
REG_PLAY
1
r/w
0h
10248Ch
REG_GPIO_DIR
8
r/w
80h
Sound effect select
Start effect playback
GPIO pin direction,
0 = input , 1 = output
102490h
REG_GPIO
8
r/w
00h
GPIO pin value (bit 0,1,7);
output pin drive strength(bit 2-6)
102494h
Reserved
-
-
-
Reserved
102498h
REG_INT_FLAGS
8
r/o
00h
10249Ch
REG_INT_EN
1
r/w
0h
Global interrupt enable
1024A0h
REG_INT_MASK
8
r/w
FFh
Interrupt enable mask
1024A4h
REG_PLAYBACK_START
20
r/w
00000h
Audio playback RAM start address
1024A8h
REG_PLAYBACK_LENGT
H
20
r/w
00000h
Audio playback sample length (bytes)
1024ACh
REG_PLAYBACK_READPT
R
20
r/o
-
1024B0h
REG_PLAYBACK_FREQ
16
r/w
1F40h
1024B4h
REG_PLAYBACK_FORMA
T
2
r/w
0h
Audio playback format
1024B8h
REG_PLAYBACK_LOOP
1
r/w
0h
Audio playback loop enable
Interrupt flags, clear by read
Audio playback current read pointer
Audio playback sampling frequency
(Hz)
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
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Address
Register Name
1024BCh
REG_PLAYBACK_PLAY
1024C0h
REG_PWM_HZ
1024C4h
REG_PWM_DUTY
1024C8h
Bit
s
Acce
ss
Reset
value
Description
1
r/o
0h
14
r/w
00FAh
BACKLIGHT PWM output frequency
(Hz)
8
r/w
80h
BACKLIGHT PWM output duty cycle
0=0%, 128=100%
REG_MACRO_0
32
r/w
00000000h
Display list macro command 0
1024CCh
REG_MACRO_1
32
r/w
00000000h
Display list macro command 1
1024D0h
–
1024E0h
Reserved
1024E4h
REG_CMD_READ
12
r/w
000h
Command buffer read pointer
1024E8h
REG_CMD_WRITE
12
r/w
000h
Command buffer write pointer
1024ECh
REG_CMD_DL
13
r/w
0000h
1024F0h
REG_TOUCH_MODE
2
r/w
3h
Touch-screen sampling mode
1024F4h
REG_TOUCH_ADC_MOD
E
1
r/w
1h
Select single ended (low power) or
differential (accurate) sampling
1024F8h
REG_TOUCH_CHARGE
16
r/w
1770h
1024FCh
REG_TOUCH_SETTLE
4
r/w
3h
Touch-screen settle time, units of 6
clocks
102500h
REG_TOUCH_OVERSAMP
LE
4
r/w
7h
Touch-screen oversample factor
102504h
REG_TOUCH_
16
r/w
FFFFh
32
r/o
-
Touch-screen raw (x-MSB16; y-LSB16)
-
-
-
Start audio playback
Reserved
Command display list offset
Touch-screen charge time, units of 6
clocks
Touch-screen resistance threshold
RZTHRESH
102508h
REG_TOUCH_
RAW_XY
10250Ch
REG_TOUCH_RZ
16
r/o
-
Touch-screen resistance
102510h
REG_TOUCH_
32
r/o
-
Touch-screen screen (x-MSB16; yLSB16)
32
r/o
-
Touch-screen screen (x-MSB16; yLSB16) used for tag lookup
8
r/o
-
Touch-screen tag result
32
r/w
00010000h
SCREEN_XY
102514h
REG_TOUCH_
TAG_XY
102518h
REG_TOUCH_TAG
10251Ch
REG_TOUCH_TRANSFOR
M_A
Touch-screen transform coefficient
(s15.16)
Copyright © 2013 Future Technology Devices International Limited
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
Address
Register Name
Bit
s
102520h
REG_TOUCH_TRANSFOR
M_B
32
r/w
00000000h
Touch-screen transform coefficient
(s15.16)
102524h
REG_TOUCH_TRANSFOR
M_C
32
r/w
00000000h
Touch-screen transform coefficient
(s15.16)
102528h
REG_TOUCH_TRANSFOR
M_D
32
r/w
00000000h
Touch-screen transform coefficient
(s15.16)
10252Ch
REG_TOUCH_TRANSFOR
M_E
32
r/w
00010000h
Touch-screen transform coefficient
(s15.16)
102530h
REG_TOUCH_TRANSFOR
M_F
32
r/w
00000000h
Touch-screen transform coefficient
(s15.16)
102534h
–
102470h
Reserved
102574h
REG_TOUCH_DIRECT_X
Y
102578h
109000h
-
Acce
ss
Reset
value
Description
-
-
Reserved
32
r/o
-
Touch screen direct (x-MSB16; yLSB16) conversions
REG_TOUCH_DIRECT_Z
1Z2
32
r/o
-
Touch screen direct (z1-MSB16; z2LSB16) conversions
REG_TRACKER
32
r/w
00000000h
Track register (Track value – MSB16;
Tag value - LSB8)
Note: All register addresses are 4-byte aligned. The value in “Bits” column refers to the number of valid
bits from bit 0 unless otherwise specified; other bits are reserved.
Copyright © 2013 Future Technology Devices International Limited
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
6
Devices Characteristics and Ratings
6.1 Absolute Maximum Ratings
The absolute maximum ratings for the FT800 device are as follows. These are in accordance
with the Absolute Maximum Rating System (IEC 60134). Exceeding these may cause
permanent damage to the device.
Table 6-1 Absolute Maximum Ratings
Parameter
Value
Unit
Storage Temperature
-65 to +150
°C
Floor Life (Out of Bag) At Factory Ambient
168
Hours
(30°C / 60% Relative Humidity)
(IPC/JEDEC J-STD-033A MSL Level 3
Compliant)*
Ambient Temperature (Power Applied)
-40 to +85
°C
VCC Supply Voltage
0 to +4
V
VCCIO Supply Voltage
0 to +4
V
DC Input Voltage
-0.5 to + (VCCIO + 0.3)
V
* If the devices are stored out of the packaging, beyond this time limit, the devices should be
baked before use. The devices should be ramped up to a temperature of +125°C and baked
for up to 17 hours.
Copyright © 2013 Future Technology Devices International Limited
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
6.2 DC Characteristics
Table 6-2 Operating Voltage and Current
(Ambient Temperature = -40°C to +85°C)
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
VCCIO
VCCIO operating
supply voltage
1.62
1.80
1.98
V
Normal Operation
2.25
2.50
2.75
V
2.97
3.30
3.63
V
VCC
VCC operating supply
voltage
2.97
3.30
3.63
V
Normal Operation
Icc1
Power Down current
-
1.0
-
µA
Power down mode
Icc2
Sleep current
-
250
-
µA
Sleep Mode
Icc3
Standby current
-
1.5
-
mA
Standby Mode
Icc4
Operating current
-
24
-
mA
Normal Operation
VCC1V2
Regulator Output
voltage
-
1.20
-
V
Normal Operation
Table 6-3 Digital I/O Pin Characteristics (VCC/VCCIO = +3.3V, Standard Drive Level)
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
2.4
-
-
V
Ioh=4mA
Vol
Output Voltage Low
-
-
0.4
V
Iol=4mA
Vih
Input High Voltage
2.0
-
-
V
Vil
Input Low Voltage
-
-
0.8
V
Vth
Schmitt Hysteresis
Voltage
0.3
0.45
0.5
V
Iin
Input leakage current
-10
-
10
uA
Ioz
Tri-state output
leakage current
-10
-
10
uA
Copyright © 2013 Future Technology Devices International Limited
Vin = VCCIO or 0
Vin = VCCIO or 0
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
Table 6-4 Digital I/O Pin Characteristics (VCCIO = +2.5V, Standard Drive Level)
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
VCCIO0.4
-
-
V
Ioh=4mA
Vol
Output Voltage Low
-
-
0.4
V
Iol=4mA
Vih
Input High Voltage
0.7 X
VCCIO
-
-
V
-
Vil
Input Low Voltage
-
-
0.3 X
VCCIO
V
-
Vth
Schmitt Hysteresis
Voltage
0.28
0.39
0.5
V
-
Iin
Input leakage current
-10
-
10
uA
Ioz
Tri-state output
leakage current
-10
-
10
uA
Vin = VCCIO or 0
Vin = VCCIO or 0
Table 6-5 Digital I/O Pin Characteristics (VCCIO = +1.8V, Standard Drive Level)
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
Voh
Output Voltage High
VCCIO0.4
-
-
V
Ioh=4mA
Vol
Output Voltage Low
-
-
0.4
V
Iol=4mA
Vih
Input High Voltage
0.7 X
VCCIO
-
-
V
-
Vil
Input Low Voltage
-
-
0.3 X
VCCIO
V
-
Vth
Schmitt Hysteresis
Voltage
Input leakage current
0.25
0.35
0.5
V
-10
-
10
uA
-10
-
10
uA
Iin
Ioz
Tri-state output
leakage current
Copyright © 2013 Future Technology Devices International Limited
Vin = VCCIO or 0
Vin = VCCIO or 0
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FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
6.3 Touch Sense Characteristics
Table 6-6 Touch Sense Characteristics (VCC=3.3V)
Parameter
Description
Minimum
Typical
Maximum
Units
Rsw-on
X-,X+,Y- and Y+
Drive On resistance
-
5
10
Ω
Rsw-off
X-,X+,Y- and Y+
Drive Off resistance
10M
-
-
Ω
Rpu
Touch sense pull up
resistance
72k
100k
128k
Ω
Vth+
Touch Detection
rising-edge threshold
level
1.53
1.7
1.87
V
Vth-
Touch Detection
falling-edge threshold
level
1.17
1.3
-1.47
V
Vhys
Touch Detection
Hysteresis
0.36
0.39
0.4
V
Rl
X-axis and Y-axis
drive load resistance
200
-
-
Ω
Conditions
Table 6-7 ADC Characteristics (VCC=3.3V)
Description
Minimum
Typical
Maximum
Units
ADC Resolution
-
10
-
bits
Integral Nonlinearity
-
+/-1
-
LSB
Differential Nonlinearity
-
+/-0.5
-
LSB
Offset Error
-
+/-2
-
LSB
Copyright © 2013 Future Technology Devices International Limited
Conditions
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FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
6.4 AC Characteristics
6.4.1 System clock
Table 6-8 System clock characteristics (Ambient Temperature = -40°C to +85°C)
Parameter
Value
Unit
Minimum
Typical
Maximum
-
12.000
-
MHz
-
5
10
pF
Frequency
-
12.000
-
MHz
Duty cycle
45
50
55
%
-
3.3
-
Vp-p
Crystal
Frequency
X1/X2
Capacitance
External clock input
Input voltage on
X1/CLKIN
6.4.2 Host Interface SPI Mode 0
Figure 6-1 SPI Interface Timing
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
Table 6-9 SPI Interface Timing Specification
Description
Parameter
VCC(I/O)=1.8V
VCC(I/O)=2.5V
VCC(I/O)=3.3V
Min
Max
Min
Max
Min
Max
Unit
Tsclk
SPI clock period
60
-
40
-
33
-
ns
Tsclkl
SPI clock low
duration
25
-
16
-
13
-
ns
Tsclkh
SPI clock high
duration
25
-
16
-
13
-
ns
Tsac
SPI access time
16
-
16
-
16
-
ns
Tisu
Input Setup
12
-
11
-
11
-
ns
Tih
Input Hold
3
-
3
-
3
-
ns
Tzo
Output enable delay
0
30
0
20
0
16
ns
Toz
Output disable delay
0
30
0
20
0
16
ns
Tod
Output data delay
0
24
0
15
0
12
ns
Tcsnh
CSN hold time
0
-
0
-
0
-
ns
6.4.3 Host Interface I2C Mode Timing
Table 6-10 I2C Interface Timing
StandardParameter
Fast-mode
Fast-plus
High speed
mode
mode
mode
Description
Min
Max
Min
Max
Min
Max
Min
Max
Unit
Fscl
I2C SCL clock
frequency
0
100
0
400
0
1000
0
3400
kHz
Tscll
clock low period
4.7
-
1.3
-
0.5
-
0.16
-
µs
Tsclh
clock high period
4.0
-
0.6
-
0.26
-
0.06
-
µs
Tsu
Data setup time
250
-
100
-
50
-
10
-
ns
Thd
Data hold time
0
-
0
-
0
-
0
70
ns
Tr
Rise time
-
1000
-
300
-
120
10
40
ns
Tf
Fall time
-
300
-
300
-
120
10
40
ns
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
6.4.4 RGB Video Timing
Table 6-11 RGB Video timing characteristics
Parameter
Description
VCC=3.3V
Unit
Min
Typ
Max
Tpclk
Pixel Clock period
78
104
-
ns
Tpclkdc
Pixel Clock duty cycle
40
-
60
%
Thc
Hsync to Clock
30
-
-
ns
Thwh
HSYNC width
1
41
-
Tpclk
1
10
-
Th
-
525
-
Tpclk
(REG_HSYNC1-REG_HSYNC0)
Tvwh
VSYNC width
(REG_VSYNC1-REG_VSYNC0)
Th
HSYNC Cycle
(REG_HCYCLE)
Tvsu
VSYNC setup
30
-
-
ns
Tvhd
VSYNC hold
10
-
-
ns
Thsu
HSYNC setup
30
-
-
ns
Thhd
HSYNC hold
10
-
-
ns
Tdsu
DATA setup
20
-
-
ns
Tdhd
DATA hold
10
-
-
ns
Tesu
DE setup
30
-
-
ns
Tehd
DE hold
10
-
-
ns
Copyright © 2013 Future Technology Devices International Limited
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
Figure 6-2 RGB Video Signal Timing
Copyright © 2013 Future Technology Devices International Limited
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
7
Application Examples
7.1 Examples of LCD Interface connection
Figure 7-1 FT800 Reference Design Schematic
Copyright © 2013 Future Technology Devices International Limited
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
8
Package Parameters
The FT800 is available in VQFN-48 package. The solder reflow profile for all packages is described in
following sections.
8.1 VQFN-48 Package Dimensions
Figure 8-1 VQFN-48 Package Dimensions
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
8.2 Solder Reflow Profile
The FT800 is supplied in a Pb free VQFN-48 package. The recommended solder reflow profile for the
package is shown in Figure 8-2.
Temperature, T (Degrees C)
tp
Tp
Critical Zone: when
T is in the range
TL to Tp
Ramp Up
TL
tL
TS Max
Ramp
Down
TS Min
tS
Preheat
25
T = 25º C to TP
Time, t (seconds)
Figure 8-2 FT800 Solder Reflow Profile
The recommended values for the solder reflow profile are detailed in Error! Reference source not
found.. Values are shown for both a completely Pb free solder process (i.e. the FT800 is used with Pb
free solder), and for a non-Pb free solder process (i.e. the FT800 is used with non-Pb free solder).
Table 8-1 Reflow Profile Parameter Values
Profile Feature
Average Ramp Up Rate (Ts to Tp)
Pb Free Solder Process
Non-Pb Free Solder Process
3°C / second Max.
3°C / Second Max.
Preheat
- Temperature Min (Ts Min.)
- Temperature Max (Ts Max.)
- Time (ts Min to ts Max)
150°C
100°C
200°C
150°C
60 to 120 seconds
60 to 120 seconds
217°C
183°C 60 to 150 seconds
Time Maintained Above Critical Temperature
TL:
- Temperature (TL)
60 to 150 seconds
- Time (tL)
Peak Temperature (Tp)
260°C
240°C
Time within 5°C of actual Peak Temperature
20 to 40 seconds
20 to 40 seconds
6°C / second Max.
6°C / second Max.
8 minutes Max.
6 minutes Max.
(tp)
Ramp Down Rate
Time for T= 25°C to Peak Temperature, Tp
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
9
FTDI Chip Contact Information
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Web Site
http://www.ftdichip.com
System and equipment manufacturers and designers are responsible to ensure that their systems, and any Future Technology
Devices International Ltd (FTDI) devices incorporated in their systems, meet all applicable safety, regulatory and system-level
performance requirements. All application-related information in this document (including application descriptions, suggested
FTDI devices and other materials) is provided for reference only. While FTDI has taken care to assure it is accurate, this
information is subject to customer confirmation, and FTDI disclaims all liability for system designs and for any applications
assistance provided by FTDI. Use of FTDI devices in life support and/or safety applications is entirely at the user’s risk, and the
user agrees to defend, indemnify and hold harmless FTDI from any and all damages, claims, suits or expense resulting from
such use. This document is subject to change without notice. No freedom to use patents or other intellectual property rights is
implied by the publication of this document. Neither the whole nor any part of the information contained in, or the product
described in this document, may be adapted or reproduced in any material or electronic form without the prior written consent
of the copyright holder. Future Technology Devices International Ltd, Unit 1, 2 Seaward Place, Centurion Business Park,
Glasgow G41 1HH, United Kingdom. Scotland Registered Company Number: SC136640
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Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
Appendix A – References
Useful Application Notes
Appendix B - List of Figures and Tables
List of Figures
Figure 2-1 FT800 Block Diagram ..................................................................................................... 4
Figure 2-2 FT800 System Design Diagram ....................................................................................... 4
Figure 4-1 Host Interface Options ................................................................................................. 14
Figure 4-2 SPI Interface 1.8-3.3V connection ................................................................................. 15
Figure 4-3 SPI Interface 5V connection .......................................................................................... 15
Figure 4-4 Crstal oscillator connection ........................................................................................... 19
Figure 4-5 External Clock Input .................................................................................................... 20
Figure 4-6 Touch screen connection .............................................................................................. 29
Figure 4-7 1.2V regulator ............................................................................................................ 31
Figure 4-8 Power State Transition ................................................................................................. 32
Figure 6-1 SPI Interface Timing .................................................................................................... 45
Figure 6-2 RGB Video Signal Timing .............................................................................................. 48
Figure 7-1 FT800 Reference Design Schematic ............................................................................... 49
Figure 8-1 VQFN-48 Package Dimensions ...................................................................................... 50
Figure 8-2 FT800 Solder Reflow Profile .......................................................................................... 51
Copyright © 2013 Future Technology Devices International Limited
53
Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
List of Tables
Table 3-1 FT800Q pin description.................................................................................................... 9
Table 4-1 Host memory read transaction (SPI) ............................................................................... 16
Table 4-2 Host memory write transaction (SPI) .............................................................................. 17
Table 4-3 Host command transaction (SPI) .................................................................................... 18
Table 4-4 Host Command Table .................................................................................................... 18
Table 4-5 Interrupt Flags bit assignment ....................................................................................... 19
Table 4-6 Font table format ......................................................................................................... 21
Table 4-7 ROM font table ............................................................................................................. 22
Table 4-8 ROM font character width (1) ......................................................................................... 22
Table 4-9 ROM font character width (2) ......................................................................................... 23
Table 4-10 REG_SWIZZLE RGB Pins Mapping ................................................................................. 25
Table 4-11 Output drive current selection ...................................................................................... 26
Table 4-12 Sound Effect .............................................................................................................. 27
Table 4-13 MIDI Note Effect ......................................................................................................... 28
Table 4-14 Touch Controller Operating Mode .................................................................................. 30
Table 4-16 Pin Status .................................................................................................................. 34
Table 5-1 FT800 Memory Map ...................................................................................................... 36
Table 5-2 Overview of FT800 Registers .......................................................................................... 37
Table 6-1 Absolute Maximum Ratings ............................................................................................ 41
Table 6-2 Operating Voltage and Current ....................................................................................... 42
Table 6-3 Digital I/O Pin Characteristics (VCC/VCCIO = +3.3V, Standard Drive Level) ......................... 42
Table 6-4 Digital I/O Pin Characteristics (VCCIO = +2.5V, Standard Drive Level) ................................ 43
Table 6-5 Digital I/O Pin Characteristics (VCCIO = +1.8V, Standard Drive Level) ................................ 43
Table 6-6 Touch Sense Characteristics (VCC=3.3V) ........................................................................ 44
Table 6-7 ADC Characteristics (VCC=3.3V) .................................................................................... 44
Table 6-8 System clock characteristics (Ambient Temperature = -40°C to +85°C) .............................. 45
Table 6-9 SPI Interface Timing Specification .................................................................................. 46
Table 6-10 I2C Interface Timing ................................................................................................... 46
Table 6-11 RGB Video timing characteristics .................................................................................. 47
Copyright © 2013 Future Technology Devices International Limited
54
Document No.: FT_000792
FT800 Embedded Video Engine
Datasheet Version 1.1
Clearance No.: FTDI# 334
Appendix C - Revision History
Document Title:
FT800 Embedded Video Engine Datasheet
Document Reference No.:
FT_000792
Clearance No.:
FTDI# 334
Product Page:
http://www.ftdichip.com/EVE.htm
Document Feedback:
DS_FT800
Version 1.0
Version 1.1
Initial Release
2
nd
release
18 July 2013
28 August 2013
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