RCA BR200D-U1, Service Manual

Page: 34 / 77

BR200D-U1/BR300D-U1
Service Manual
34
80 I
PC12/
I2S3_SD
I2S_TX DMR I2S_TX
81 I/O PD0 K2 Key Board K2 Input
82 I/O PD1 K3 Key Board K3 Input
83 I/O PD2 K4 Key Board K4 Input
84 I/O PD3 K5 Key Board K5 Input
85 I/O PD4 K6 Key Board K6 Input
86 I/O PD5 K7 Key Board K7 Input
87 I/O PD6 K8 Key Board K8 Input
88 O PD7 V_CS DMR V_CS
89 O
PB3/
SPI3_SCK
V_SCLK DMR V_SCLK
90 I
PB4/
SPI3_MISO
V_SDO DMR V_SDO
91 O
PB5/
SPI3_MOSI
V_SDI DMR V_SDI
92 O PB6 SPK_C Speaker Output Control(High Active)
93 O PB7 AFCO Audio Amplifier Control(High Active)
94 I BOOT0 BOOT0 Connect a 10K resistor to Ground
95 O
PB8/
I2C1_SCL
SCL Software Control Watch Dog Serial Clock
96 O
PB9/
I2C1_SDA
SDA Software Control Watch Dog Serial Data
97 O PE0 MICPWR_C MIC Power Switch(High Active)
98 O PE1 K1 Key Board K2 Input
99 S VSS_3 VSS_3 Connect to Ground
100 S VDD_3 VDD_3 Connect to 3.3V
。
Table 4 Functional description of semiconductor device
Item Model Function Description
IC1 SKY72310 Frequency Synthesizer
IC100 NJM2904 APC, Voltage Comparison, Driving
IC200 NJM2591V Receiver 2
nd
Local Oscillation, 2
nd
IF Amplification, Limitation, Demodulation, Noise
Amplification
IC300 NJM2902V Receiver demodulated signal Amplification, Filtering
IC601 TA75W01FU MIC Amplification
IC302 TDA2822D Audio Frequency Power Amplification
IC613 W25Q80 FLASH, Channel Frequency Data Storage, Function Setting Parameter, Debug
Mode Parameter