27
DVX-11B
MAIN BOARD IC201 MB90477PFV-G-154-BNDE1 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
MD_ON
O
Power supply on/off control signal output for the mechanism deck block and audio/video section
“H”: power on
2
AV_ON
O
Power supply on/off control signal output for the audio/video section “H”: power on Not used
3
NC
O
Not used
4
BEEP
O
Beep sound drive signal output terminal
5
FAN
O
Fan motor drive signal output terminal Not used
6
DISCINLED
O
DISC IN LED drive signal output terminal “H”: LED on
7
ILL_ON
O
Power on/off control signal output terminal for illumination LED “H”: LED on
8
NC
O
Not used
9
VSS
—
Ground terminal
10 to 20
NC
O
Not used
21
VCC
—
Power supply terminal (+3.3V)
22 to 24
NC
O
Not used
25
RXD
I
Receive data input terminal for UART communication when data writing to flash memory
26
TXD
O
Transmit data output terminal for UART communication when data writing to flash memory
27 to 30
NC
O
Not used
31
EE_CKO
O
Serial data transfer clock signal output to the EEPROM Not used
32
EE_SIO
I/O
Two-way data bus with the EEPROM Not used
33
AVCC
—
Power supply terminal (+3.3V)
34
AVRH
I
Reference voltage (+3.3V) input terminal
35
AVSS
—
Ground terminal
36
KEYIN0
I
Front panel key input terminal (A/D input)
37
KEYIN1
I
Key input terminal (A/D input) Not used
38
KEYIN2
I
Key input terminal (A/D input) Not used
39
TEMP
I
Temperature sensor connection terminal (A/D input) Not used
40
VSS
—
Ground terminal
41
AD_ON
O
A/D converter power control signal output
When the KEY_ACK pin that controls reference voltage power for key A/D conversion input is
active, “L” is output from this terminal to enable the input
42 to 44
NC
O
Not used
45
KEY_ACK
I
Acknowledge signal (wake up signal) input terminal for the key entry Acknowledge signal is
input to accept any function key in the standby status On at input of “H”
46
NC
O
Not used
47 to 49
MD0 to MD2
I
Setting terminal for the CPU operational mode
50 to 53
NC
O
Not used
54
BU_IN
I
Power supply terminal (+3.3V)
55
ACC_IN
I
Accessory power detection signal input terminal “L”: accessory power on
56
BUS_SI
I
Serial data input from the DSP
57
BUS_SO
O
Serial data output to the DSP
58
BUS_CKI
I
Serial data transfer clock signal input from the DSP
59
BUS_REQ
O
Data transfer request signal output to the DSP
60
DSP_RST
O
System reset signal output to the DSP
61
NC
O
Not used
62
SIRCS
I
SIRCS signal input terminal
63 to 66
NC
O
Not used
•
IC Pin Function Description
