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UPD70320GJ-5BG Datasheet(PDF) 7 Page - NEC

Part # UPD70320GJ-5BG
Description  V25TM 16/8-BIT SINGLE-CHIP MICROCONTROLLER
Download  74 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD70320GJ-5BG Datasheet(HTML) 7 Page - NEC

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7
µPD70320
1.
PIN FUNCTIONS
1.1
Port Pins
Pin Name
Input/Output
Port Function
Control Function
P00 to P06
Input & output
8-bit input/output ports, each to
—
P07/CLKOUT
Input & output/output
be specified bit-by-bit
System clock output
P10/NMI
Input
Used as non-maskable interrupt
—
request input (input port)
P11/INTP0
Used as both external interrupt
P12/INTP1
request input and input port
P13/INTP2/INTAK
Input/input/output
INT acknowledge signal output
P14/POLL/INT
Input & output/input/input
Used as both specifiable input/
External interrupt request input
output port and POLL input
P15/ TOUT
Input & output/output
Input/output port specifiable
Timer output
P16/SCK0
bit-by-bit
Serial clock output
P17/READY
Input & output/input
READY input
P20/DMARQ0
Input & output/input
8-bit input/output port specifiable DMA request input (CH0)
P21/DMAAK0
Input & output/output
bit-by-bit
DMA acknowledge output (CH0)
P22/TC0
DMA end output (CH0)
P23/DMARQ1
Input & output/input
DMA request input (CH1)
P24/DMAAK1
Input & output/output
DMA acknowledge output (CH1)
P25/TC1
DMA end output (CH1)
P26/HLDAK
Input & output/output
HOLD acknowledge output
P27/HLDRQ
Input & output/input
HOLD input
PT0 to PT7
Input
8-bit input port with comparator
—
Remark
All port pins become input ports after reset is released.
When using P13/INTP2/INTAK as a INTAK pin, be sure to pull up the pin to avoid a malfunction of external
interrupt controller after reset is released.


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