LG GCE 8480B Service Manual page 53

Write Strategy Interface (5)
13 WXR
15 ODON
16 OUT1/OSCEN 3.3V LVTTL output,
18 OUT2/CMOD 3.3V LVTTL output,
19 CFREQ
Write strategy & ASP transmission Interface (16)
55 XRST#
56 ASPREQ
57 RLDON
58 WLDON
60 HRFZC
61 H11T
62 XLAT
63 XDATA
65 XCLK
66 SERVSH
44
3.3V LVTTL output, Laser diode write power control output. (Write/Read mode SW
Slew rate, signal)
2mA, 4mA, 6mA,
8mA, 10mA, 12mA,
14mA, 16mA PDR
3.3V LVTTL output, Laser diode over drive control output. (Over drive control SW
Slew rate, signal)
2mA, 4mA, 6mA,
8mA, 10mA, 12mA,
14mA, 16mA PDR
Internal flag output. Include : "WSR_OSCEN" signal
Slew rate,
8mA driving
Internal flag output. Include : "WSR_CMOD" signal
Slew rate,
8mA driving
3.3V LVTTL output, Frequency selection signal output.
Slew rate,
8mA driving
3.3V LVTTL output, RF reset output. Active low.
4mA driving
3.3V LVTTL Input, ASP request signal input from MT1516 to get RECD1, XTOR,
SMT, 75K pull-down DEFECT automatically.
3.3V LVTTL I/O, Read laser diode on control signal.
75K pull-down, Alternate function : ICE mode selection input during power-on
4mA driving stage (PRST falling edge). A logical low input indicates internal
µP is used. A logical high input indicates external µP is
connected.
3.3V LVTTL output, Write laser diode on control signal.
4mA driving
3.3V LV TTL Input, High frequency RF ripple zero crossing input.
SMT, 75K pull-up
3.3V LVTTL output, EFM 11T indicator for ROPC sampling.
Slew rate,
8mA driving
3.3V LVTTL output, Latch signal output for RF register setting.
4mA driving
3.3V LVTTL I/O, Data signal output for RF register setting.
Slew rate,
75K pull-down,
4mA driving
3.3V LVTTL output, Carrier clock signal output for RF register setting.
Slew rate,
8mA driving
3.3V LVTTL output, Sample pulse for servo signal (main beam/ side beam)
2mA, 4mA, 6mA,
8mA, 10mA, 12mA,
14mA, 16mA PDR