LG CRD-8483B Service Manual page 22

Pin No. Symbol
115 DMARQ
116~121, DD[15:0]
123~129,
131~133
DGND
122
DVDD
130
Reset Interface
HRST_
134
POR
147
IPLL VCO Interface
IPLLVDD
135
IPLLVSS
136
Extended GPIO Interface
IO[8:5]
17~20
37 IO4/CS
145 IO0
IO1
146
Mega Interface
21 LED
22 EJECT_
PLAY_
23
DGND
137
TRAYIN_
138
139 TRAYOUT_
140 TROPEN
141 TRCLOSE
142 LIMIT_
143 DVDD3
144 DGND
Motor and Actuator Driver Interface
148 FG
LDC
149
FMO
150
20
Type Description
TTL Output DMA Request. This signal, used for DMA data transfer, is asserted by the
MT1198 when it is ready to transfer data to or from the host.
TTL I/O pull_up/ Device Data. This is the 8-bit or 16-bit bi-directional data bus to the host.
pull_down The lower 8 bits, DD0-DD7, are used for 8-bit data transfers.
Note : All pins except DD7 may be selectively pull up/down with 20k
resistant.
Ground Ground pin for internal digital circuitry.
Power(5V) Power pin for internal digital circuitry.
TTL Input, SMT Host reset input. The active low input is used to reset MT1198.
TTL Input, SMT Power on reset input, active high.
Analog power(5V) Power pin for IPLL VCO circuitry.
Ground Ground pin for IPLL VCO circuitry.
TTL I/O, Slew rate Programmable GPIO.
50Kpull_up
TTL I/O Programmable GPIO.
50K pull_up Alternate function : Chip select signal for flash ROM selection, active low.
TTL I/O Programmable bi-directional I/O.
50K pull_down Alternate function : Serial bus reserved for MT1136.
TTL I/O Programmable bi-directional I/O.
50K pull_up Alternate function : Serial bus reserved for MT1136.
TTL Output LED control output. Controlled by µP.
TTL Input Eject/stop key input, active low.
TTL Input Play/pause key input, active low.
Ground Ground pin for internal digital circuitry.
TTL Input Tray_is_in input. A logical low indicates the tray is in. Feedback flag from
tray connector.
TTL Output Tray_is_out input. A logical low indicates the tray is out. Feedback flag
from tray connector.
TTL Output Tray open output. Controlled by µP.
TTL Output Tray close output. Controlled by µP.
TTL Input Sledge inner limit input, active low.
Power(3.3V) Power pin for internal digital circuitry.
Ground Ground pin for internal digital circuitry.
TTL Input, SMT Motor Hall sensor input.
50K pull_up
TTL Output Laser diode control. A logical high enables laser diode.
Analog Output Feed motor control. PWM output.
Alternate function : Programming PWM output. For stepping motor
(sledge) application.