Canon LV-S3E/D78-5423, Service Manual, Page: 67 / 106

Part 4: Troubleshooting
4-8
51 D5 D5 Data Bus 5 I/O
184 D4 D4 Data Bus 4 I/O
121 D3 D3 Data Bus 3 I/O
50 D2 D2 Data Bus 2 I/O
49 D1 D1 Data Bus 1 I/O
183 D0 D0 Data Bus 0 I/O
127 RD RD Read Enable Not used I/O
56 WR WR Write Enable Not used I/O
118 BHEN BHEN High Byte Enable Not used I/O
188 ROMOE ROMOE ROM Output Enable for Flash ROM O
126 ROMWE ROMWE ROM Write Enable for Flash ROM O
125 RAMOE RAMOE RAM Output Enable Not used O
54 RAMWE RAMWE RAM Write Enable Not used O
177 Port C1 CS3 Chip Select 3 Not used O
230 Port C0 CS2 Chip Select 2 Not used O
238 EXTINT EXTINT External Interrupt Input I/O
120 NMI - Non-maskable Interrupt (Not used) (set L) I
48 RESET RESET Master Reset Input I
233 ADR24B ADR24B 24bit Address Select Input (set H) I
133 MODE3 NODE3 Internal Oscillator Enable Enable Input (set H) I
290 MODE2 MODE2 Reserved (set L) I
248 MODE1 MODE1 Internal MCLK PLL Enable Input (set H) I
232 MODE0 MODE0 Internal DCLK PLL Enable Input (set H) I
Pin No. Name Function Name Function Polarity I/O
Note: Other functions except for system control are not listed.
2.2 IIC Bus D/A Converter (IC3551, M62393FP)
1 R Reset Input I
2 SCL P_SCK2 IIC BUS SCL I
3 SDA P_SDA2 IIC BUS SDA I/O
4 A05 CG_FILT O
5 A06 FILT_480P/575P O
6 A07 S/CV_SW O
7 A08 Not used O
8 VrefL DAC Lower Reference Voltage input -
9 VrefU 1 DAC Upper Reference Voltage input (CH5~CH8) -
10 Vss GND -
11 VrefU 2 DAC Upper Reference Voltage input (CH1~CH 4) -
12 A01 AUD_PC/AV_SW O
13 A02 VOLUME O
14 A03 PC/AV_SW O
15 A04 CBAL_SW Color Correction On/Off ON = L O
16 Vcc Power Supply for Output Buffer (+5V) -
17 Vdd Power 5V -
18 CS2 Slave address setting port 2 (GND) I
19 CS1 Slave address setting port 1 (GND) I
20 CS0 Slave address setting port 0 (GND) I
Pin No. Name Function I/O