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
Summary of Contents for BR200D-U1
Page 1: ...BR200D U1 BR300D U1 Service Manual 1 BR200D U1 BR300D U1 Service Manual ...
Page 17: ...BR200D U1 BR300D U1 Service Manual 17 Exploded View of the Parts ...
Page 20: ...BR200D U1 BR300D U1 Service Manual 20 DR7000 2 ...
Page 36: ...BR200D U1 BR300D U1 Service Manual 36 Chapter 6 PCB Layout ...
Page 37: ...MIC1 C5 D4 D5 D8 C4 C3 R1 D2 D3 D6 C7 C8 C9 J1 D1 D9 C2 D7 C6 C13 C1 ...
Page 70: ...BR200D U1 BR300D U1 Service Manual 66 Chapter 10 Block and Schematic ...