RAiO RA8806 - Display Future

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Version 1.3 RA8806 Two Layers Character/Graphic LCD Controller 4. Pin Definition 4-1 MPU Interface Pin Name I/O Description DATA[7:0] I/O Data Bus These are data bus for data transfer between MPU and RA8806. The high nibble DATA[7:4] is output and should keep floating when 4-bits data bus mode is used. Enable/Read Enable ZRD When MPU interface(I/F) is 8080 series, this pin (ZRD) is used as data read, I (EN) active low. When MPU I/F is 6800 series, this pin (EN) is used as Enable, active high. Write/Read-Write When MPU I/F is 8080 series, this pin (ZWR) is used as data write, active ZWR I low. (ZRW) When MPU I/F is 6800 series, this pin(ZRW) is used as data read/write control. Active high for read and active low for write. Command / Data Select Input The pin is used to select command/data cycle. RS = 0, data Read/Write cycle is selected. RS = 1, status read/command write cycle is selected. In 8080 interface, usually it connects to “A0” address pin. RS ZCS1 CS2 INT BUSY I I O O RS ZWR ZRD Access Cycle 0 0 1 Data Write 0 1 0 Data Read 1 0 1 CMD Write 1 1 0 Status Read Chip Select Input The MPU interface of RA8806 is active only when ZCS1 is low and CS2 is high. Interrupt Signal Output The interrupt output for MPU to indicate the status of RA8806. It could be setup active high or low. Busy Signal Output This is a busy output to indicate the RA8806 is in busy state. It could be set to active high or active low by register. The RA8806 can’t access MPU cycle when BUSY pin is active. It could be used for MPU to poll busy status by connecting it to I/O port. 4-2 Clock Interface Pin Name I/O Description XG I X’tal Input In internal clock mode, this pin connects to external X’tal(4M ~ 12MHz). In external clock mode, it connects to external clock. XD O X’tal Output This pin connects to external X’tal(4M ~ 12MHz). In external clock mode, it keeps floating. RAiO TECHNOLOGY INC. 8/193 www.raio.com.tw
Version 1.3 RA8806 Two Layers Character/Graphic LCD Controller 4-3 Peripheral Interface Pin Name I/O Description ZRST I Reset Signal Input This active-low input performs a hardware reset on the RA8806. It is a Schmitt-trigger input with pull-up resistor for enhanced noise immunity; however, care should be taken to ensure that it is not triggered if the supply voltage is lowered. X1 I Touch Panel Input The left analog input pin(XL) of 4-wires touch panel. X2 I Touch Panel Input The right analog input pin(XR) of 4-wires touch panel. Y1 I Touch Panel Input The top analog input pin(YU) of 4-wires touch panel. If user want to use Touch Panel function, please add a 39K~51Kohm external pull-up resistor on this pin. Y2 I Touch Panel Input The bottom analog input pin(YD) of 4-wires touch panel. PWM_OUT KIN[7:0] KOUT[7:0] CLK_OUT DW MI DB O I O O I I I PWM Output Signal This output signal is used to control back-light module or booster circuit. Key Pad Input These pins are keypad inputs with pull-up resistors. For un-used input, please keep floating. Key Pad Output These pins are keypad outputs. For un-used pin, please keep floating. Clock Output This is a multi-function output pin that depending on the value of register REG[01h] Bit-6. REG[01h] Bit-6 = 0: The pin is the output of internal system clock. REG[01h] Bit-6 = 1: The pin indicate the SLEEP state of Status Register(0: Normal Mode, 1: Sleep Mode). LCD Driver Data Bus Select This pin is used to select data bus of LCD driver is 8-bits or 4-bits: 0 : LCD driver data bus is 4-bits, LD[3:0] is used. 1 : LCD driver data bus is 8-bits, LD[7:0] is used. When 4-bits data bus is used, LD[7:4] need to keep floating. RA8806T1N does not support this function, its LCD driver data bus is fix 4-bits. MPU Type Select This pin is used to select MPU interface protocol: 0 : Intel 8080 series MPU interface. 1 : Motorola 6800 series MPU interface. 8080/6800 MPU Data Bus Select This pin is used to select data bus width. 0 : 4-bits MPU I/F, DATA[3:0] is used. 1 : 8-bits MPU I/F, DATA[7:0] is used. When 4-bits data bus is used, DATA[7:4] need to keep floating. RAiO TECHNOLOGY INC. 9/193 www.raio.com.tw
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RAiO RA8806 - Display Future

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