Ic Bus I/O Expander (Ic1851) Port Functions; Ic Bus I/O Expander (Ic2181) Port Functions; Ic Bus Da Converter (Ic1831) Port Functions - Canon LV-7355J Service Manual

2.2 IC Bus I/O Expander (IC1851) Port Functions

Pin No. Name Function
1 S Reset
2 SCL IIC SCL
3 SDA IIC SDA
4 D0 CARD_IN
5 D1 VIEWER_ON
6 D2 SCDT1
7 D3 TURBO_LED
8 VSS GND
9 D4 WARNING_LED
10 D5 LAMPREP_LED
11 D6 READY_LED
12 D7 Not used
13 VDD 5 V
14 CS2 Chip Select 2
15 CS1 Chip Select 1
16 CS0 Chip Select 0

2.3 IC Bus I/O Expander (IC2181) Port Functions

Pin No. Name Function
1 S Reset
2 SCL IIC SCL
3 SDA IIC SDA
4 D0 MOD 2
5 D1 MOD 1
6 D2 PNR
7 D3 NTPL 2
8 VSS GND
9 D4 NTPL 1
10 D5 Not used
11 D6 C -SWIN
12 D7 S _ SW
13 VDD 5 V
14 CS2 Chip Select 2
15 CS1 Chip Select 1
16 CS0 Chip Select 0

2.4 IC Bus DA Converter (IC1831) Port Functions

Pin No. Name Function
1 R Reset
2 SCL IIC SCL
3 SDA IIC SDA
4 AO7 FAN_CONT_1
5 AO8 FAN_CONT_2
6 AO9 EDIDEN
7 AO10 AUDIOMUTE
8 AO11 PWRDN0
9 AO12 DCOM_OFF
10 VrefL
11 VrefU1
12 GND GND
13 VrefU2
14 AO1 VOL_CNT
15 AO2 Not used
16 AO3 MOUSE
17 AO4 MOUSE_RESET
18 AO5 TURBO +
19 AO6 TURBO -
20 Vcc Digital power supply
21 Vdd Analog power supply
22 CS2 Chip Select 2
23 CS1 Chip Select 1
24 CS0 Chip Select 0
Action
Open
Active "L"
Active "L"
L: CARD H: No CARD
L: VIEWER Unit exist
DVI Sync. detection H: DVI
H: on L: off
-
H: on L: off
H: on L: off
H: on L: off
Fixed "L"
Vcc
Fixed "L"
Fixed "L"
Fixed "H"
Action
Open
Active "L"
Active "L"
NTSC4.43: H else: L
Fixed "L"
NTSC, NTSC4.43: L else: H
PAL-M, PAL-N: H else: L
-
PAL, PAL-N: H else: L IN
Fixed "L"
Component signal detection (L: Component)
S signal detection (L: S-Input)
Vcc (5V)
Fixed "L"
Fixed "L"
Fixed "L"
Action
Fixed "H"
Active "L"
Active "L"
0xFFh: Min 0x00h: Max
0xFFh: Min 0x00h: Max
L: H8 side H: PC side
L: Mute Off H: Mute On
AD Power down (L: DVI/MCI H: PC)
Digital Comb Filter Usage H: used L: No used
D/A converter lower ref. voltage Connect to GND
D/A converter upper ref. voltage (CH7~CH12) Vcc
GND
D/A converter upper ref. voltage (CH1~CH6) Vcc
Control sound output volume, L: minimum
Fixed L
Air mouse On/Off H: On L: Off
Air mouse CPU reset Reset start: H->L->H
Turbo motor control (+) L: On
Turbo motor control (-) L: On
Fixed "H"
Fixed "H"
Fixed "L"
4-11
Part 4: Troubleshooting
I/O
-
-
-
IN
IN
IN
OUT
-
OUT
OUT
OUT
OUT
-
-
-
-
I/O
-
-
-
OUT
OUT
OUT
OUT
-
OUT
IN
IN
-
-
-
-