tc9457f TOSHIBA Semiconductor CORPORATION, tc9457f Datasheet - Page 5

• Manufacturer Part Number: tc9457f
• Description: Firmware Built In Digital Servo
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Description Of Pin Function
Pin No.
21~24
1~10
11
12
13
14
15
16
17
18
P1-0~P1-3
S10/OT14
S11/OT15
S12/OT16
S13/OT17
S14/OT18
S8-0/S15
P8-1/S16
P8-2/S17
P8-3/S18
Symbol
S1/OT5
/K0~K3
/MBOV
/AOUT
/CLCK
/DATA
/SFSY
/LRCK
/BCK
/IPF
~
/LCD segment
LCD segment
LCD segment
/Output ports
/Output ports
/CD signals
/CD signals
/Key input
Pin Name
I/O port 1
I/O ports
outputs
outputs
outputs
ports
Segment signal outputs to the LCD panel.
Up to 72 segments in a matrix with COM1 to COM4 can
be displayed.
All of the S1 to S18 pins can be switched for output ports
by a program (Note 1). Also, the S15 to S18 pins each
can be switched for I/O ports individually. When set for I/O
ports, these pins become Nch open-drain outputs.
Furthermore, the S11 to S14 and the P8-0 to P8-3 pins
can be switched for use as CD signal (CLCK to IPF)
input/output pins by a program.
For CD signal output, set parameters OT for output and
LEDon = 1.
Furthermore, when set for output ports, the buffer
capability can be increased by setting the LEDon bit to 1,
so that it can be used as an LED driver. These pins
normally are used for LED segment outputs. Since the
output ports can increment OT1 through OT18 by an
instruction, data in external RAM/ROM can be accessed
easily.
Note 1: After a system reset, the output port shared pins
4-bit CMOS I/O ports.
These ports can be set for input or output bit for bit by a
program.
These pins can be pulled up to V
program. Therefore, they can be used as key input pins.
Also, when they are set for I/O port input, a change of
state in this input can be used to clear the clock stop or
wait mode.
· CLCK : Subcodes P thru W data readout clock
· DATA : Subcodes P thru W data output.
· SFSY : Playback system frame sync
· LRCK : Channel clock (44.1 kHz) output. It
· BCK
· AOUT : Audio data output.
· MBOV : Buffer memory-over signal output.
· IPF
are set for LCD output and the I/O port shared
pins are set for I/O port input.
: Bit clock (1,4112 MHz) output.
: Correction flag output. When AOUT is
Function And Operation
input/output.
Selected between input and output by
a command.
signal output.
outputs a low for L channel and a high
for R channel. Polarity can be inverted
by a command.
It outputs a high when buffer overflows.
C2 correction output, it outputs a high
indicating that correction is impossible.
5
DD
or down to GND by a
Remarks
2002-10-21
TC9457F
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