tc94a23f TOSHIBA Semiconductor CORPORATION, tc94a23f Datasheet - Page 8

• Manufacturer Part Number: tc94a23f
• Description: Single-chip Cd Processor With Built-in Controller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Number
39~42
Pin
30
31
32
38
88
/SI0/SI1/SDA
OT22/COFS
OT19/ HSO
OT20/SPCK
OT21/SPDA
/SCK/SCL
P4-1/S12
Symbol
TESTM
TESTC
P4-2
P4-3
I/O port 4/serial data
control signal output
Test mode control
Output port/CD
input/output
/serial clock
input/output
/serial data
Pin Name
input
input
3-bit CMOS I/O port.
Input/output can be set for each bit by
program.
These pins are also used as serial interface
(SIO) circuit input/output pins.
SIO is a serial interface supporting 2-line and
3-line methods. Starting from the MSB or LSB,
4 or 8-bit serial data are output to the SO/SDA
pin, or data on the SI1 and SI2 pins are input
to the device at the clock edge on the
SCK/SCL pin. As the serial operating clock
(SCK/SCL), an internal (450/225/150/75 kHz)
or external clock can be selected. Rising or
falling shift can also be selected. The clock
and data output can be N-channel open drain.
These selections facilitate controlling the LSI
and communications between the controllers.
All SIO inputs incorporate a Schmidt circuit.
SIO and its control can be set by program.
Input pins for controlling Test mode.
When the pins are at High level, the device is
in Test mode; at Low level, in normal
operation.
Normally, set the pins to Low level or NC
(pull-down resistors are incorporated).
4-bit general-purpose output port.
After system reset, the pins are set to a
Low-level output port.
The pins can be switched to CD control output
pins by program. Setting OT19 to OT22 to 0
switches all four pins to CD control output
pins. Setting OT19 to OT22 and CDIO to 1
enables the pins to be switched as follows
according to the segment data contents of the
S15 and S16 pins:
SPCK: Outputs clock for reading processor
APCK: Outputs clock for reading processor
SPDA: Outputs processor status signal.
COFS: Outputs frame clock for correction
When SIO interrupts are enabled, an interrupt
completes, and the program jumps to address
is generated as soon as execution of the SIO
4. This is effective for performing serial
HSO : Outputs playback speed mode.
communications at high speed.
status signal (176.4 kHz).
status signal.
(7.35 kHz).
Function and Operation
8
Normal speed: High
Double speed: Low
Input instruction + SI0
R
IN2
Remarks
TC94A23F
2002-02-06
MV
ON
MV
MV
DD
DD
DD