User's Manual

2-4-1.1. UART Interface Signals
Pin No Pin Name Description Type
10 BT_UART_TXD
Bluetooth UART Serial Output
Serial data output for the HCI UART Interface
O
12 BT_UART_RXD
Bluetooth UART Series Input
Serial data input for the HCI UART Interface
I
14 BT_UART_RTS_N
Bluetooth UART Request to Send.
Active-low request to send signal for the HCI UART interface
O
8 BT_UART_CTS_N
Bluetooth UART Clear to Send
Active-low clear to send signal for the HCI UART interface.
I
2-4-1.2. UART Timing
Values are specified in the recommended operating conditions unless otherwise specified.
Symbol Description Min Typ Max Units
1 Delay time, BT_UART_CTS_N low to UART_TXD valid 24 Baudout cycles
2 Setup time, BT_UART_CTS_N high before midpoint of stop bit 10 ns
3 Delay time, midpoint of stop bit to BT_UART_RTS_N high 2 Baudout cycles
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