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MZ-R909
Pin No.
Pin Name
I/O Description
158 EVA I EVA/FLASH chip discrimination terminal “L”: FLASH chip, “H”: EVA chip
159 OPR LED
—
Not used (open)
160 SSB DATA I/O Input/output of SSB data with RF amp (IC501)
161 SSB CLK O SSB clock output to RF amp (IC501)
162 MCUVSS0
—
Ground terminal (for the microcomputer block)
163 VREC PWM O Over write head control spare terminal Not used (open)
164 VL PWM O PWM signal output for the laser power supply voltage control to the power control (IC901)
165 VC PWM O PWM signal output for the system power supply voltage control to the power control (IC901)
166
SPDL AUX
PWM
O PWM signal output for the spindle support to the motor driver (IC551)
167, 168 NC O Not used (open)
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
“L”: when upper panel close
171 NC O Not used (open)
172 SET CODE0 I Input terminal for the set (fixed at “L” in this set)
173 SET CODE1 I Input terminal for the set (open in this set)
174, 175 SET CODE2, 3 I Input terminal for the set (fixed at “L” in this set)
176 MIFVDD1
—
Power supply terminal (for the microcomputer I/F block) (+2.3V)
177 MIFVSS1
—
Ground terminal (for the microcomputer I/F block)
178 AOUT SEL O HP/LINE changeover signal output to the headphone amp (IC302)
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 Rechargeable battery detection switch (S804) input terminal “L”: there is rechargeable battery
183 BEEP O Beep sound control signal output to the headphone amp (IC302)
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 to the headphone amp (IC302)
“L”: muting ON
187 LCD RST AUX O Reset control signal output terminal to the liquid crystal display element “L”: reset
188 PAUSE KEY I Pause key input terminal from the switch & LCD module
189 MIC SENSE O
Mic sense control signal output to the mic amp (IC303) “L”: Low sensitivity “H”: High
sensitivity
190 XPATCH I Patch function detection input terminal “L”: patch function Not used (open)
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
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) (+2.3V)