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80
I
–
I
I
I
I
I
–
I
I
I
I
I
I
O
O
–
O
I
O
O
O
I
–
–
–
O
–
I
I
–
I
I
I
–
–
I
–
–
–
Key input 4
Ground (Connected to Ground)
Key input 5
Key input 6
Version input
Model input
Stop input
Not used (Connected to Ground)
MD 0 (To MD0 of MB90574)
MD 1 (Connected to power 5 V)
MD 2 (To MD2 of MB90574)
Hardware STANDBY input
RDS clock input
RDS data input
Volume up data output
Volume down data output
Not used (Connected to Ground)
Reset output (Connected to MB90574 RESET)
Slave request and data input (Connected to MB90574 SLV DATA/REQ)
Master request output (Connected to MB90574 DISPMR)
Master data output (Connected to MB90574 DISP DATA)
Master clock output (Connected to MB90574 DISPCLK)
Audio bus input
Not used (Connected to Ground)
Not used (Connected to Ground)
Not used (Connected to Ground)
Audio bus output
Not used (Connected to Ground)
Function encoder up input
Function encoder down input
Not used (Connected to Ground)
Speaker A selector switch input
Speaker B selector switch input
Power key input
Not used (Connected to Ground)
Not used (Connected to Ground)
Reset (Display MCU)
Not used (Connected to Ground)
Not used (Connected to Ground)
Not used (Connected to Ground)
AD KEY IN 4
VSS
AD KEY IN 5
AD KEY IN 6
AD VERSION
AD MODEL
STOP
—
MD 0
MD 1
MD 2
HSTX
RDS CLOCK
RDS DATA
VOL UP
VOL DOWN
—
U-RESET
U-SREQ
U-MREQ
U-DATA
U-CLOCK
AUBUS-IN
—
—
—
AUBUS-OUT
—
FUNCTION-UP
FUNCTION-DW
—
SP-A
SP-B
POW-KEY IN
—
—
RESET
—
—
—
Pin No.
Pin Name
I/O
Function
