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UPD70433GD
(CPU)
PIN
FUNCTION
PIN NAME
I/O
FUNCTION
P00-P07
I/O
PORT
0
NMI
I
NON
MASKABLE INTERRUPT
INTP0-1NTP5
I
EXTERNAL INTERRUPT REQUEST
P20-P21
I/O
PORT
2
TXDO-TXDl
Q
TRANSMIT DATA OUTPUT
RXDO-RXDl
I
RECEIVE DATA
INPUT
TXC
0
TRANSMIT CLOCK OUTPUT
CTSO
I
ENABLING SIGNAL
INPUT
SCKl
0
SIRIAL CLOCK OUTPUT
P40-P47
I/O
PORT
4
P50-P52
I/O
PORT
5
ANI0-ANI3
I
ANALOG SIGNAL
INPUT
P70-P77
I/O
PORT
7
DMARQO-DMARQl
I
DMA
REQUEST SIGNAL INPUT
GND
GROUND
VDD
+5V
POTENTIAL
AVSS
ANALOG GROUND
AVDD
ANALOG
+5V
POTENTIAL
AVREF
I
REFERENCE POTENTIAL
INPUT FOR A/D
CONVERTER
RESET
I
SYSTEM RESET SIGNAL INPUT
XI.
X2
I
SYSTEM CLOCK INPUT
CLKOUT
0
SYSTEM CLOCK OUTPUT
ASTB
0
ADDRESS STROBE SIGNAL OUTPUT
RD
0
DATA READ
STROBE SIGNAL OUTPUT
WRL
0
LOW BIT DATA WRITE STROBE SIGNAL OUTPUT
WRH
0
MIGHT BIT DATA WRITE STROBE SIGNAL OUTPUT
READY
I
READY SIGNAL
INPUT
DEX
0
DATA BUS ENABLE SIGNAL OUTPUT
RAS
0
DRAM ROW ADDRESS LATCH TIMMING SIGNAL OUTPUT
D8/D16
I
BUS SIZE SELECT INPUT
BUSLOCK
0
BUS LOCK SIGNAL OUTPUT
POLL
I
POLL SIGNAL INPUT
HLDRQ
I
BUS HOLD REQUEST SIGNAL INPUT
HLDAK
0
BUS HOLD ACKNOWLEDGE SIGNAL OUTPUT
AD0-AD15
I/O
ADDRESS/DATA SIGNAL
A16-A23
0
ADDRESS SIGNAL OUTPUT
lORD
0
I/O
READ STROBE SIGNAL OUTPUT
lOVR
0
I/O
WRITE STROBE SIGNAL OUTPUT
DNAAKO-DMAAKl
0
DMA
ACKNOWLEDGE SIGNAL OUTPUT
TCEO-TCEl
0
DMA
FINISH SIGNAL OUTPUT
31

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