Service manual

GX30
6 – 18
CONFIDENTIAL
IC704 (LR38863): DISPLAY CONTROLLER
Pin No. Terminal name Input/Output Description of terminal
1 DUMMY4 – Dummy 4
2 VDDPLL – PLL Power supply 1.8 V (1.6 V~ 2.0 V)
3 PLLGND – PLL Ground
4 PLLDIV0 Input PLL multiply switching signal
5 PLLDIV1 Input PLL multiply switching signal
6 HSD0 Input/Output Data bus for high-speed serial transfer
7 HSD1 Input/Output Data bus for high-speed serial transfer
8 HSD2 Input/Output Data bus for high-speed serial transfer
9 HSWRD Input/Output Read/Write determination signal for high-speed serial transfer
10 HSEN Input/Output High-speed serial data effective signal High is active
11 HSCK Input/Output Standard clock for high-speed serial transfer (5 to 33 MHz)
12 DUMMY3 – Dummy 3
13* PWM1/PORT8 Output PWM output 1
General-purpose PORT output (default) (Not used)
14 PLLDIV2 Input PLL multiply switching signal
15 VDDCORE – CORE Power supply 1.8 V (1.6 V~ 2.0 V)
16 GND – Logic ground
17 SUBWR_B Input/Output Light signal for External display
18 GND – Logic ground
19 VDDCORE – CORE Power supply 1.8 V (1.6 V~ 2.0 V)
20 PWM0/PORT3 Output PWM output 0
General-purpose PORT output (default)
21 SUBCS_B Input/Output Chip select signal for External display
22 CS_B Input/Output Device select signal (Display is active when CS_B is “Low”)
23 VDDIO – IO Power supply 3.0 V (2.7 V~ 3.3 V)
24 LCDINT Output External interrupt signal (Starting varies when interruption occurs.)
25 GTDIO_B Output MPEG4ASIC internal core power-cut signal (“Low” is active.)
26 VDDIO – IO Power supply 3.0 V (2.7 V~ 3.3 V)
27 SUBDB1 Input/Output Data bus for External display
28 BDATA[5] (B5) Output Display panel B output signa
29 BDATA[5] (B4) Output Display panel B output signa
30 BDATA[5] (B3) Output Display panel B output signa
31 GND – Logic ground
32 TESTI Input Test terminal (Connected to GND normally)
33 BSHS_B Input/Output External Bit Stream horizontal synchronization signal (“Low” is active)
34 WR_B Input/Output Host write strobe signal
35 SUBRS Input/Output Data determination signal for External display
36 MP4 RESET_B Output MPEG4ASIC reset control signal (“Low” is active)
37 HSD6 Input/Output Data bus for high-speed serial transfer
38 BDATA[2] (B2) Output Display panel B output signal
39 BDATA[2] (B1) Output Display panel B output signal
40 BDATA[2] (B0) Output Display panel B output signal
41* EXCS_B1 Input/Output Chip select output 1 (internal decode output) (Not used)
42* XOUT Output Oscillation circuit output (Not used)
43 VDDIO – IO Power supply 3.0 V (2.7 V~ 3.3 V)
44 GND – Logic ground
45 SCANEN Input Full scan effective signal “High” is active
(Connected to GND normally)
46 RD_B Input/Output Host read strobe signal
47 RSP Input/Output Register selection signal
HOST_IF section : RSP = Low...Display access
RSP = High...Control access
Hyper_Serial section : RSP = Low...Control acces
RSP = High...Display access
48 GND – Logic ground
49 HSD3 Input/Output Data bus for high-speed serial transfer
50 DCLK Input/Output Data sampling clock (display clock)
51 VSYNC Input/Output Vertical synchronization signal
52 HSYNC Input/Output Horizontal synchronization signal
53* EXCS_B3 Input/Output Chip select output 3 (internal decode output) (Not used)
54 XIN Input Oscillation circuit input/External clock input signal
Clock input for full scan
55 SUBDB6 Input/Output Data bus for External display
56 RESET_B Input Master reset (All registers are initialized when Low is activated)