Introduction
The FX-TXXXXC256A series liquid crystal controller includes: FX-T3224C256A, FX-T4024C256A, FX-T4824C256A, FX-T6448C256A, FX-T8060C256A. Among them, FX-T3224C256A actuation 320×240 TFT screen, FX-T4024C256A actuation 400×240 TFT screen, FX-T4824C256A actuation 480×240 TFT screen, FX-T6448C256A actuation 640×480 TFT screen, FX-T8060C256A actuation 800×600 TFT screen All controllers demonstrated the color is 256 colors The FX-TXXXXC256A series controller since has promoted, in the industry control, the instrument measuring appliance, the medical electron, the power equipment, domain and so on numerical control engine bed has obtained the widespread application. The FX series controller simplified the application programming from the design angle. Even if knows nothing about to the liquid crystal, you also can very relaxed write the attractive man-machine contact surface.

Controller hardware architecture explanation

FX-TXXXXC256A is simple with 51 connections, the connection signal includes: 8 data lines, 1 piece route selection, 1 reads the holding wire, 1 writes the holding wire, with 1 port choice line. The port choice line uses for to choose the order the port and the data port. FX-TXXXXC256A has the extremely quick read-write ability. The controller does not have "to be busy" the signal judgement, the data which as necessary might accept MPU to deliver the data which and reads out to give MPU.

FX-TXXXXC256A and MPU connection

Writes the succession

Reads the succession

DB is the data bus, may be straight one after another on MPU, RS may meet the address wire, uses for to choose the port, is when 0 chooses the order port, is when 1 chooses the data port; /CS is 片� the signal, low level effective, /RD reads the signal, the low level is effective; /WR writes the signal, the low level is effective
According to on chart segment, the system order port address may suppose is 7E00H, the data port address may be 7F00H.

Software design
This controller does not have to initialize, the user may directly take it as exterior memory or the IO port visit. The controller instruction-code register definition is:
- - - -  -  A16 CMD1  CMD0

CMD1, CMD0 definition:
CMD1  CMD0  function
0  0  explicit addresses low 8 registers
0  1  explicit address high 8 registers
1  0  demonstrations data read-write channel
1  1  closure all channels and register

A16: Expresses the 17th bit address
This controller support simple point read-write, after finished address automatic Canada 1, writes all over a line automatically to line feed.
Software explanation that,

#define WCMD 0x7e00 // orders the port
#define WDAT 0x7f00 // data port

Writes the first page (0~65535) to reveal saves the sequence:
WCMD = 0x00; // to orders the port to write 0, gets down as soon as replies to each point in turn the data port visit to establish low 8 to reveal saves
WDAT = 0x00; // reveals saves the low 8 bit address to suppose is 0
WCMD = 0x00; // to orders the port to write, gets down as soon as replies to each point in turn the data port visit to establish high 8 to reveal saves
WDAT = 0x00; // reveals saves the low 8 bit address to suppose is 0, then reveals saves the address to suppose is 0;
WCMD = 0x02; // finished after this instruction, the under logarithm directly reads in according to the port visit the data
// arrives reveals saves
WCMD = 0x55; // 0 writes to the address 55, the interior reveals saves the address to add 1;
WCMD = 0xaa; // 1 writes AA to the address, the dummy home address adds 1;
... ...

Writes the second page (65536~131071) to reveal saves the sequence:
WCMD = 0x04; // to orders the port to write 0, gets down as soon as replies to each point in turn the data port visit to establish low 8 to reveal saves, // A16 = 1
WDAT = 0x00; // reveals saves the low 8 bit address to suppose is 0
WCMD = 0x05; // to orders the port to write, gets down as soon as replies to each point in turn the data port visit to establish high 8 to reveal saves
// A16 = 1;
WDAT = 0x00; // reveals saves the low 8 bit address to suppose is 0, then reveals saves the address to suppose is 0;
WCMD = 0x06; // finished after this instruction, the under logarithm directly reads in according to the port visit the data
// arrives reveals saves
WCMD = 0x55; // writes to address 10000H 55, the interior reveals saves the address to add 1;
WCMD = 0xaa; // writes AA to address 10001H, the dummy home address adds 1;
... ...

Concluding remark
This article discussed the FX-TXXXXC256A controller and the monolithic integrated circuit connection application, soft, the hardware design extremely is all simple, causes the user to think is not is writing a LCD demonstration procedure, but is in carries on the operation to ordinary RAM or the IO port. The user may develop the attractive practical man-machine contact surface in the extremely short time, greatly reduces the cycle which the product appears on the market.
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