s6b0724 Densitron Corporation, s6b0724 Datasheet - Page 19

• Manufacturer Part Number: s6b0724
• Description: 132 Seg / 65 Com Driver & Controller For Stn Lcd
• Manufacturer: Densitron Corporation

S6B0724
FUNCTIONAL DESCRIPTION
MICROPROCESSOR INTERFACE
Chip Select Input
There are CS1B and CS2 pins for chip selection. The S6B0724 can interface with an MPU only when CS1B is "L"
and CS2 is "H". When these pins are set to any other combination, RS, E_RDB, and RW_WRB 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
S6B0724 has three types of interface with an MPU, which are one serial and two parallel interfaces. This parallel or
serial interface is determined by PS pin as shown in table 8.
Parallel interface (PS = "H")
The 8-bit bi-directional data bus is used in parallel interface and the type of MPU is selected by C68 as shown in
table 9. The type of data transfer is determined by signals at RS, E_RDB and RW_WRB as shown in Table 10.
Common
C68
RS
H
H
H
L
L
L
PS
H
L
PRELIMINARY SPEC. VER. 1.1
E_RDB
CS1B
CS1B
CS1B
(E)
H
H
H
H
6800-series
Parallel
Serial
Type
RW_WRB
Table 9. Microprocessor Selection for Parallel Interface
(RW)
CS2
CS2
CS2
H
H
L
L
Table 8. Parallel / Serial Interface Mode
CS1B
CS1B
CS1B
Table 10. Parallel Data Transfer
E_RDB
(/RDB)
RS
RS
RS
H
H
L
L
8080-series
RW_WRB
(/WRB)
E_RDB
CS2
CS2
CS2
/RDB
E
H
H
L
L
132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD
RW_WRB
/WRB
RW
C68
Writes to internal register (instruction)
*
H
L
Display data read out
Register status read
DB0 to DB7
DB0 to DB7
DB0 to DB7
Display data write
Description
6800-series MPU mode
8080-series MPU mode
Interface mode
Serial-mode
6800-series
8080-series
MPU bus
* : Don't care
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