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CMOS 8-bit Single Chip Microcomputer
Description
The CXP80712A/80716A/80720A/80724A is a CMOS
8-bit microcomputer which consists of A/D converter,
serial interface, timer/counter, time base timer, vector
interruption, high precision timing pattern generation
circuit, PWM generator, PWM for tuner, VISS/VASS
circuit, 32kHz timer/event counter, remote control
receiving circuit, VCR vertical sync separation circuit
and the measuring circuit which measure signals of
capstan FG and drum FG/PG and other servo systems,
as well as basic configurations like 8-bit CPU, ROM,
RAM and I/O port. They are integrated into a single chip.
Also CXP80712A/80716A/80720A/80724A provides
sleep/stop function which enables to lower power
consumption and ultra-low speed instruction mode in
32kHz operation.
Features
• A wide instruction set (213 instructions) which cover various types of data
— 16-bit arithmetic instruction/multiplication and division instructions/boolean bit operation instruction
• Minimum instruction cycleDuring operation 250ns/16MHz (Supply voltage 4.5 to 5.5V)
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
Input pin to request external interruption and non
maskable interruption. Active when falling edge.
Serial clock (CH1) I/O pin.
PI6/SO1
PI7/SI1
PJ0 to PJ7
EXTAL
XTAL
TEX
TX
RST
MP
AVDD
AVREF
AVss
VDD
Vss
I/O/output
I/O/input
I/O
Input
Output
Input
Output
Input
Input
Input
Serial data (CH1) output pin.
Serial data (CH1) input pin.
(Port J)
8-bit I/O port. Function as standby release input can be specified by bit
unit. I/O can be specified by bit unit.
Connecting pin of crystal oscillator for system clock. When supplying
the external clock, input the external clock to EXTAL pin and input
opposite phase clock to XTAL pin.
Connecting pin of crystal oscillator for 32kHz timer clock. When used
as event counter, input to TEX pin and leave TX pin open. (Feedback
resistor is not removed.)
System reset pin of active "L" level.
Microprocessor mode input pin. Always connect to GND.
Positive power supply pin of A/D converter.
Reference voltage input pin of A/D converter.
GND pin of A/D converter.
Positive power supply pin.
GND pin. Connect both Vss pins to GND.
– 6 –
Input/Output Circuit Formats for Pins
CXP80712A/80716A/80720A/80724A
Pin
PA0/PPO0
to
PA7/PPO7
PB0/PPO8
to
PB7/PPO15
16 pins
PC0/PPO16
to
PC2/PPO18
PC3/RTO3
to
PC7/RTO7
Port A
Port B
Data bus
Port C
PPO data
Port A or Port B
RD
PPO, RTO data
Port C data
Port C direction
Circuit format
Output becomes active from high
impedance by data writing to port register.
(Every bit)
IP
Input
protection
circuit
When reset
Hi-Z
Hi-Z
8 pins
PD0
to
PD7
8 pins
Data bus
Port D
Data bus
RD (Port C)
Port D data
Port D direction
RD (Port D)
(Every 4 bits)
PD0 to 3
PD4 to 7
IP
High
current
12mA
Hi-Z
– 7 –
CXP80712A/80716A/80720A/80724A
A
A
A
Pin
PE0/INT0
PE1/EC/INT2
2 pins
PE2/PWM0
PE3/PWM1
PE4/DAA0
PE5/DAA1
4 pins
Port E
Port E
Data bus
DA gate output
or PWM output
Hi-Z control
Port E data
Port/DA output
select
RD (Port E)
Circuit format
Schmitt input
IP
MPX
A
When reset
Hi-Z
Data bus
RD (Port E)
Hi-Z
PE6/DAB0
PE7/DAB1
2 pins
AN0
to
AN3
4 pins
PF0/AN4
to
PF3/AN7
Port E
Data bus
Port F
DA gate output
Hi-Z control
Port E data
Port/DA output
select
RD (Port E)
Input multiplexer
IP
Input multiplexer
IP
MPX
AA
A/D converter
A/D converter
H level
Hi-Z
Hi-Z
4 pins
Data bus
RD (Port F)
– 8 –
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