The CXP80712B/80716B/80720B/80724B is a CMOS
8-bit microcomputer which consists of A/D converter,
serial interface, timer/counter, time base timer, high
precision timing pattern generation circuit, PWM output,
VISS/VASS circuit, 32kHz timer/counter, remote
control receiving circuit, VSYNC separator and the
measurement circuit which measures 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 CXP80712B/80716B/80720B/80724B provides
sleep/stop function which enables to lower power
consumption.
Features
• A wide instruction set (213 instructions) which cover various types of data
— 16-bit arithmetic/multiplication and division/boolean bit operation instructions
• Minimum instruction cycle250ns at 16MHz operation
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
NC
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 set in a unit of
single bits. I/O can be set in a unit of single bits.
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 Low level.
Test 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.
NC pin.
Connect this pin to VDD for normal operation.
Vss
GND pin. Connect both Vss pins to GND.
– 6 –
Input/Output Circuit Formats for Pins
CXP80712B/80716B/80720B/80724B
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
Ports A and B data
Data bus
Port C
PPO, RTO data
PPO data
RD (Ports A and B)
Port C data
Port C direction
Circuit format
Output becomes active from high
impedance by data writing to port register.
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)
IP
Large
current
12mA
Hi-Z
– 7 –
CXP80712B/80716B/80720B/80724B
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
PWM output
Hi-Z control
Port E data
Port/DA output
select
AA
RD (Port E)
Schmitt input
IP
Circuit format
RD (Port E)
A
MPX
A
When reset
Hi-Z
Data bus
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
A
RD (Port E)
Input multiplexer
IP
Input multiplexer
IP
MPX
A/D converter
A/D converter
High level
Hi-Z
Hi-Z
4 pins
Data bus
RD (Port F)
– 8 –
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