Product
Name
Version
Doc No
Date
Page
S76S/S78S SDK Manual
C
May 3, 2017
6 of 33
d. Reset button
Connected to MCU HW reset pin
Active low (Pull low to trigger reset behavior).
e. I2C1 pins
Supporting 100KHz, 400KHz and 1MHz.
f. BAT pins
2-pin connector for a chargeable battery.
g. SMA-J Antenna Connector
RF signal input
h. JTAG pins
20-pin JTAG connector for ST-Link flashing & debugging FW.
i. XB External Pins (Pin1 to Pin10)
j. XB External Pins (Pin11 to Pin20)
k. XB Additional Breakout (Pin1 to Pin10)
l. XB Additional Breakout (Pin1 to Pin10)
Pins definition reference is located at 2.2.2.
UART1 TX(PA9), RX(PA10) pins
UART4 TX(PA0), RX(PA1) pins
UART2 TX(PA2), RX(PA3) pins
UART5 TX(PC12), RX(PD2) pins
Three standard serial port pins (UART2/4/5) for debugging
message input or output or data pins.
UART1 TX RX pins converts to mini USB D+/D- by USB to UART IC.
SPI1 pins
SCL, MISO, MOSI, NSS
Up to 42 Mbps, it can either configure as Master or Slave mode.
ADC pins
12-bit ADC in.
VCC & GND pins
Test pins for measuring purpose.
