Read Sony CMT-DX400 / CMT-DX400A / HCD-DX400 Service Manual online
HCD-DX400/DX400A
21
MAIN BOARD IC6 STM8S105K4T6 (Flash, EEPROM, ADC, Timers, UART, SPI, I²C)
Pin No.
Pin Name
I/O
Description
1
RST
I
MCU Reset
2
PA1/OSCIN
I
Crystal in
3
PA2/OSCOUT
O
Crystal out
4
VSS
-
Digital ground
5
VCAP
-
1.8 V regulator capacitor
6
VDD
-
Digital power supply
7
VDDIO_1
-
I/O power supply
8
PF4/AIN12
I
Audio in signal detection
9
VDDA
-
Analog power supply
10
VSSA
-
I/O ground
11
PB5/AIN5
I
Series data of RDS function for tuner
12
PB4/AIN4
I
Series clock of RDS function for tuner
13
PB3/AIN3
O
Series clock for tuner
14
PB2/AIN2
I/O
Series data for tuner
15
PB1/AIN1
O
Series clock for audio control
16
PB0/AIN0
I/O
Series data for audio control
17
PE5/SPI_NSS
O
Reset CXD9770R (LE)/CXD9771R (LE)
18
PC1/TIM1_CC1
O
PWM signal for fi lament voltage
19
PC2/TIM1_CC2
O
PWM signal for power supply frequency control
20
PC3/TIM1_CC3
I
Detect input for tuner
21
PC4/TIM1_CC4
I
Detect input for headphone
22
PC5/SPI_SCK
I
Key input for standby
23
PC6/SPI_MOSI
O
LED control for standby
24
PC7/SPI_MISO
I Standby
control
25
PD0/TIM3_CC2
I
Stereo indication of tuner
26
PD1/SWIM
I
MCU update
27
PD2/TIM3_CC1
I
IR receive input
28
PD3/TIM3_CC2
I
Volume control Encoder-
29
PD4/TIM2_CC1/
BEEP
I
Volume control Encoder+
30
PD5/UART3_TX
I/O
UART_2_TX for CXD9770R (LE)/CXD9771R (LE) and MCU
31
PD6/UART3_RX
I/O
UART_2_RX for CXD9770R (LE)/CXD9771R (LE) and MCU
32
PD7/TLI
O
Audio output mute
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