ST7577 Sitronix Technology, ST7577 Datasheet - Page 13
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ST7577
Manufacturer Part Number
ST7577
Description
Dot Matrix LCD Controller/Driver
Manufacturer
Sitronix Technology
Datasheet
1.ST7577.pdf
(48 pages)
- Current page: 13 of 48
- Download datasheet (2Mb)
ST7577
PS2=“L”, PS1=“L”, PS0=“L”: 4-line SPI interface
When ST7577 is set into 4-line SPI interface mode, setting CSB to be “L” will active this chip. If CSB is “H”, the internal 8-bit
shift register and a 3-bit counter are reset. When CSB is “L”, the serial data (SDA) and the serial clock (SCLK) are set into
input mode. The input signal on SDA will be latched into the shift register from D7 to D0 at the rising edge of the serial clock.
The display data/instruction indication is controlled via the register select pin: A0. If A0=”L”, the input signal on SDA will be
treated as instruction; if A0=”H”, the input signal on SDA will be treated as data. After 8-bit data are written into the Data
Display RAM, the DDRAM column address pointer will be increased by one automatically.
PS2=“H”, PS1=“L”, PS0=“L”: 3-line SPI interface
Because 3-line SPI interface mode does not have a register selection pin “A0”, this mode latches the A0 bit first and then
latches 8-bit input (please refer to the following figure).
Ver 1.0a
Figure 2
Figure 3
13/48
4-line SPI Timing
3-line SPI Timing
www.DataSheet4U.com
2008/02/14
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