MSM65512A View Datasheet(PDF) - Oki Electric Industry
Part Name
Description
MFG CO.
'MSM65512A' PDF : 23 Pages View PDF
¡ Semiconductor
MSM65512A/65P512A
PIN DESCRIPTIONS
Basic Functions
Function
Power
Supply
Oscillation
Symbol
VDD
GND
OSC0
OSC1
RESET
Type
—
—
I
O
I
EA
I
Control
RD
O
ALE
O
PORT 0
I/O
Port
PORT 1
I/O
PORT 2
I/O
PORT 3
Description
+5V power supply
0V digital ground
Crystal oscillation input/external clock input
Crystal oscillation output
System reset input (program starts from address 0040H);
internal pull-up resistor
Program memory select input pin.
"L" level input for external program memory; "H" level input
for internal program memory.
Read strobe signal during external memory access
Address latch signal during external memory access
8-bit Input-output port
During external memory access, becomes address/data bus for address
output, instruction fetch or data read/write along with ALE,
RD and WR pins
8-bit Input/output port
Address bus during external memory access
8-bit Input/output port ¥ 2. Secondary functions shown in following table are
added for ports 2 and 3.
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