Sindoh A610 Series, Service Manual

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4. SSI SPI TX DATA
5. SSO SPI RX DATA
6. GND GND
7. SSCK SPI CLOCK
8 SCS SPI SELECTING SIGNAL
9 POWER_BUTTON POWER BUTTON SIGNAL
10 +5V_LED POWER BUTTON LED
POWER
11 POWER_LED POWER BUTTON LED
SIGNAL
USB Connector
PIN No.
Signal Description
1. VBUS USB POWER
2. D- USB D- DATA
3. D+ USB D+ DATA
4. GND GND
5. SHIELD1 USB SHIELD GND
6. SHIELD2 USB SHIELD GND
Components and Basic Functions
Basic components of OPU and their functions are as follows.
1. R5F212A7SNFA of MCU uses 8 Mhz external clock to communicate with system
card by SPI. Communication standard is 32KHz SPI.
2. OP consists of 7 keys. BUTTON1~6 Lines are each connected to an MCU GPIO
PORT to detect which button is pressed. The power button is connected to the
Power Management IC in the system card.
3. White LED and red LED are controlled separately by using LED S8050 (NPN TR)
as a switching element..
4. The MCU on OPU and LCD controller on LCM (LCD module) transmit and receive
signals with 4-bit parallel method.