BBK DV725SI, Service Manual

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95 URD#
InOut 4mA,
SRPD,SMT
Microcontroller read strobe, active low
97 UP1_2
InOut 4~16mA,
SRPD,SMT
Microcontroller port 1-2
98 UP1_3
InOut 4mA,
SRPD,SMT
Microcontroller port 1-3
99 UP1_4
InOut 4mA,
SRPD,SMT
Microcontroller port 1-4
100 UP1_5
InOut 4mA,
SRPD,SMT
Microcontroller port 1-5
101 UP1_6 SCL
InOut 4mA,
SRPD,SMT
1) Microcontroller port 1-6
2) I2C clock pin
102 UP1_7 SDA
InOut 4mA,
SRPD,SMT
1) Microcontroller port 1-7
1) I2C data pin
103 UP3_0 RXD
InOut 4mA,
SRPD,SMT
1) Microcontroller port 3-0
2) 8032 RS232 RxD
104 UP3_1 TXD
InOut 4mA,
SRPD,SMT
1) Microcontroller port 3-1
2) 8032 RS232 TxD
105 UP3_4
RXD
SCL
InOut 4mA,
SRPD,SMT
1) Microcontroller port 3-4
2) Hardwired RD232 RxD
3) I2C clock pin
106 UP3_5
RXD
SDA
InOut 4~16mA,
SRPD,SMT
1) Microcontroller port 3-5
2) Hardwired RD232 TxD
3) I2C data pin
109 IR Input SMT IR control signal input
110 INT0#
InOut 4~16mA,
SRPD,SMT
Microcontroller external interrupt 0, active low
Audio interface ( 28 )
204 SPMCLK SCLK0 Inout
1) Audio DAC master clock of SPDIF input
2) While SPDIF input is not used:
I) Serial interface port 0 clock pin
II) GPIO
205 SPDATA SDIN0 Inout
1) Audio data of SPDIF input
2) While SPDIF input is not used:
I) Serial interface port 0 data-in
II) GPIO
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