SL20T0081 System Logic Semiconductor, SL20T0081 Datasheet - Page 11

• Manufacturer Part Number: SL20T0081
• Description: SLS System Logic Semiconductor
• Manufacturer: System Logic Semiconductor

SLS System Logic Semiconductor
System Interface pins
Pin Name
D7 ~ D0
RESET
P68/80
(SCK)
(R/W)
CE1
CE2
(SI)
WR
RD
RS
(E)
PS
I/O
I/O
I
I
I
I
I
I
I
Device Reset pin.
When RESET = 0, device initialization operation is executed.
8bit bi-directional data bus that should be connected to the standard MPU data bus.
When PS=0 the serial interface is enabled and pins are set as following.
When the chip does not be selected, D7 ~ D0 are set to high impedance.
Display data / Control data selection signal input pin
Chip Select signal input pins
When CE1 = 0 and CE2 = 1, then the chip select becomes active,
and data/command I/O is enabled.
Bus type selection pin.
Parallel data transfer / Serial data transfer mode selection pin.
When PS = 0, RD(E) and WR(R/W) pins are fixed to either 0 or 1.
D7
D6
D5 ~ D0 : high impedance state
RS = 1
RS = 0
PS = 1
PS = 0
P68/80 = 1 : 6800 MPU bus type interface.
P68/80 = 0 : 8080 MPU bus type interface
When the device connected to an 8080 MPU bus, this pin acts as “active LOW” read
signal input pin. If the device is selected and RD = 0, then SL20T0081 outputs the data
to data bus pins.
When the device connected to a 6800 MPU bus, this pin acts as “active HIGH” R/W
enable signal input pin. If the device is selected and RD = 1, then SL20T0081 executes
read or write operation that controlled by WR signal.
When the device connected to an 8080 MPU bus, this pin acts as “active LOW” write
signal input pin. If the device is selected and WR = 0, then SL20T0081 accepts the data
via data bus pins.
When the device connected to a 6800 MPU bus, this pin acts as read/write control signal
input pin.
WR(R/W) = 1
WR(R/W) = 0
PS
1
0
Data transfer mode
Parallel data transfer
: Serial data input (SI)
: Serial interface clock input (SCK)
: D7 ~ D0 input are display data
: D7 ~ D0 input are control data
Serial data transfer
: Parallel data transfer mode.
: Serial data transfer mode.
: Read
: Write
disabled
enabled
Read
Function
enabled
enabled
Write
Data bus
D7 ~D0
D7 (SI)
SL20T0081
D6 (SCK)
SCK pin
-