34
MZ-R500/R500PC
Pin No.
Pin Name
I/O
Description
169
CLK SEL
O
System clock select signal output to the power control (IC901)
170
OPEN CLOSE SW
I
Open/close detection switch (S806) of the upper panel input terminal (A/D input)
“L”: when upper panel close
171
GND SW
O
Control signal output to the ground (GND) changeover switch
172
SET CODE0
O
Input terminal for the set (fixed at “L” in this set)
173, 174
SET CODE1, 2
O
Input terminal for the set (open in this set)
175
SET CODE3
O
Input terminal for the set (fixed at “L” in this set)
176
MIFVDD1
—
Power supply terminal (for the microcomputer I/F block) (+2.3 V)
177
MIFVSS1
—
Ground terminal (for the microcomputer I/F block)
178
(AOUT SEL)
O
HP/LINE changeover signal output Not used (open)
179
SI0
I
Serial data input from the nonvolatile memory (IC804) and liquid crystal display
element module
180
SO0
O
Serial data output to the nonvolatile memory (IC804), A/D converter (IC301) and
liquid crystal display element module
181
SCK0
O
Serial clock signal output to the nonvolatile memory (IC804), A/D converter (IC301)
and liquid crystal display element module
182
(XGUM ON)
I
Battery pack detection switch input terminal for the charge
“L”: there is battery pack for the charge Not used (open)
183
BEEP
O
Beep sound control signal output Not used (open)
184
NC
O
Not used (open)
185
VD SEL
O
VD power supply changeover signal output terminal Not used (open)
186
(XMUTE)
O
Analog muting control signal output terminal “L”: muting ON Not used (open)
187
LCD RST AUX
O
Reset control signal output terminal to the liquid crystal display element “L”: reset
188, 189
NC
O
Not used (open)
190
XPATCH
I
Patch function detection input terminal “L”: patch function Fixed at “L” in this set
191
OPT DET
I
DIN plug detection signal input terminal
192
XJACK DET
I
LINE IN plug detection signal input terminal
193
(XMIC DET)
I
Microphone plug detection signal input terminal Not used (open)
194, 195
PD S0, PD S1
O
PD IC mode changeover signal output to the optical pick up
196
MIFVDD2
—
Power supply terminal (for the microcomputer I/F block) (+2.3 V)
197 – 199
MODE1 – 3
O
Power supply control signal output (for the over write head drive) to the over write
head drive (IC601)
200, 201
HD CON 1, 2
O
Over write head control signal output to the over write head drive (IC601)
202
REC WBL SW
O
LPF changeover switch input terminal when REC/PB control Not used (open)
203
XCS ADA
O
Chip select signal output to A/D converter (IC301)
204
XPD ADA
O
Power supply control signal output for the drive to A/D converter (IC301)
205
XCS LCD
O
Chip select signal output to the liquid crystal display element
206
LCD STB
O
Strobe signal output to the the liquid crystal display element
207
LCD RST
O
Reset control signal output to the liquid crystal display element Not used (open)
208
(REC LED)
O
LED ON/OFF control signal output for REC display Not used (open)
209
(LD ON)
O
ON/OFF control signal output terminal of the laser diode Not used (open)
210
(TSB SLV CHK)
I
TSB slave detection signal input terminal
211, 212 (K-TAI-MON), (K-TAI-SW)
I
Not used (open)
213
MCUVSS1
—
Ground terminal (for the microcomputer block)
214
CAV CLV SW
O
CAV/CLV changeover control signal output Not used (open)
215
XOPT CTL
O
Power supply ON/OFF control signal output for DIN PD drive
216
(CS RTC)
O
Chip select signal output to the clock IC Not used (open)
217
OFTRK
I
Off track signal input from RF amp (IC501)
218
MUTE
O
Analog muting control signal output “H”: muting ON
219
XCS NV
O
Chip select signal output to EEPROM (IC804)
220
XRST MTR DRV
O
Reset control signal output to the motor driver (IC701)
221
XRF RST
O
Reset control signal output to RF amp (IC501)
222
MCUVDD3
—
Power supply terminal (for the microcomputer block) (+1.5 V)
