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4
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CXP851P16
(Port A)
Single bit selectable 8-bit port.
(8 lines)
(Port B)
Single bit selectable 8-bit port.
(8 lines)
(Port C)
Single bit selectable 8-bit port.
(8 lines)
(Port D)
Single bit selectable
8-bit port.
12mA sink current
drive possible.
(8 lines)
(Port E)
8-bit port, lower
6 bits for input,
upper 2 bits for
output.
(8 lines)
(Port F)
8-bit output port
with large current
(12mA) N-ch open
drain output.
Lower 4 bits
middle voltage
tolerance (12V),
upper 4 bits 5V
suppression.
(8 lines)
CRT display 4-bit output pin.
CRT display horizontal synchronization signal input pin.
CRT display vertical synchronization signal input pin.
Pin Description
Symbol
PA0 to PA7
PB0 to PB7
PC0 to PC7
PD0/INT2
PD1/SCK
PD2/SO
PD3/SI
PD4/HSI
PD5/ACI
PD6/RMC
PD7/EC
PE0/INT0
PE1/INT1
PE2/AN0
to
PE5/AN3
PE6/PWM
PE7/TO
PF0/PWM0
to
PF3/PWM3
PF4/PWM4/
SCL0
PF5/PWM5/
SCL1
PF6/PWM6/
SDA0
PF7/PWM7/
SDA1
R, G, B, BLK
HSYNC
VSYNC
I/O
I/O
I/O
I/O/Input
I/O/I/O
I/O/Output
I/O/Input
I/O/Input
I/O/Input
I/O/Input
I/O/Input
Input/Input
Input/Input
Output/Output
Output/Output
Output/Output
Output/Output/
I/O
Output/Output/
I/O
Output
Input
Input
I/O
Description
Input pin for external interrupt request.
Active on falling edge.
Serial clock pin.
Serial data output pin.
Serial data input pin.
HSYNC counter input pin.
Power supply frequency counter input pin.
Remote control receiver circuit input pin.
External event timer/counter input pin.
Input pin for external interrupt request.
Active on falling edge.
(2 lines)
Analog input pin for A/D converter.
(4 lines)
14-bit PWM output pin.
(CMOS output)
Square wave output for timer 1.
(50% duty cycle)
6-bit PWM output pin.
(8 lines)
I
2
C bus interface transfer clock
input/output pin.
I
2
C bus interface transfer data
input/output pin.