Data Sheet

FSC-BT825
深圳市飞易通科技有限公司 www.feasycom.com
4. PIN DEFINITION DESCRIPTIONS
Pin Pin Name Pad Type Description
1
GND VSS
Power
Ground
2
PCM-CLK Bi-directional Synchronous data clock(operating votage level: 3.3V)
3
PCM_OUT CMOS output Synchronous data output(operating votage level: 3.3V)
4 PCM_IN CMOS input Synchronous data input(operating votage level: 3.3V)
5 PCM-SYNC Bi-directional Synchronous data sync(operating votage level: 3.3V)
6 CLK_IN CMOS input
32.768kHZ clock in
Connect to external clock(optional)
NC (default)
7 GND VSS Power Ground
8 GND VSS Power Ground
9 VDD_3V3 VDD Power supply voltage 3.3V
10 BT_Enable CMOS input
Module enable input(active high)
Note: VDD_3V3 must be stable before pulling up
BT_Enable
11 UART_RX CMOS input UART data input
12 UART_TX CMOS output UART data output
13 UART_RTS CMOS output UART request to send active low
14 UART_CTS CMOS input UART clear to send active low
15 GND VSS Power Ground
16
RF RF_IN/OUT
Bluetooth 50ohm transmitter output/receiver input
NC if using internal antenna(default)
Connect to external antenna(optional)
Table 2
5. Interface Characteristics
5.1 UART Interface
Four signals are used to implement the UART function. When FSC-BT825 is connected to
another digital device, UART_RX and UART_TX transfer data between the two devices. The
remaining two signals, UART_CTS and UART_RTS, can be used to implement RS232
hardware flow control where both are active low indicators.
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