參數(shù)資料
型號: KS0741
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 128 SEG / 129 COM DRIVER & CONTROLLER FOR 4 GRAY SCALE STN LCD
中文描述: 128賽格/ 129 COM驅(qū)動程序
文件頁數(shù): 18/74頁
文件大小: 985K
代理商: KS0741
128 SEG / 129 COM DRIVER & CONTROLLER FOR STN LCD PRELIMINARY SPEC. VER. 1.2 KS0741
14
FUNCTIONAL DESCRIPTION
MICROPROCESSOR INTERFACE
Chip Select Input
There is CSB pin for chip selection. The KS0741 can interface with an MPU when CSB is "L". When these pins are
set to any other combination, RS, E_RD, and RW_WR inputs are disabled and DB0 to DB7 are to be high
impedance. And, in case of serial interface, the internal shift register and the counter are reset.
Parallel / Serial Interface
KS0741 has four types of interface with an MPU, which are two serial and two parallel interfaces. This parallel or
serial interface is determined by PS pin as shown in table 9
.
Table 9. Parallel / Serial Interface Mode
Type
PS1
CSB
PS0
Interface mode
H
L
H
6800-series MPU mode
8080-series MPU mode
Parallel
CSB
H
4-pin SPI mode
Serial
L
CSB
L
3-pin SPI mode
Parallel Interface (PS0 = "H")
The 8-bit bi-directional data bus is used in parallel interface and the type of MPU is selected by PS1 as shown in
table 10. The type of data transfer is determined by signals at RS, E_RD and RW_WR as shown in table 11.
Table 10. Microprocessor Selection for Parallel Interface
PS1
CSB
RS
E_RD
RW_WR
DB0 to DB7
MPU bus
H
L
CSB
CSB
RS
RS
E
RW
/WR
DB0 to DB7
DB0 to DB7
6800-series
8080-series
/RD
Table 11. Parallel Data Transfer
Common
6800-series
8080-series
RS
E_RD
(E)
RW_WR
(RW)
E_RD
(/RD)
RW_WR
(/WR)
Description
H
H
L
L
H
H
H
H
H
L
H
L
L
H
L
H
H
L
H
L
Display data read out
Display data write
Register status read
Writes to internal register (instruction)
NOTE:
When E_RD pin is always pulled high for 6800-series interface, it can be used CSB for enable signal. In this
case, interface data is latched at the rising edge of CSB and the type of data transfer is determined by signals at RS,
RW_WR as in case of 6800-series mode.
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