BCM89359 Advance Data Sheet
UART Interface
Figure 18: UART Timing
BT_UART_CTS_N
1
2
BT_UART_TXD
Midpoint of STOP bit
Midpoint of STOP bit
BT_UART_RXD
3
BT_UART_RTS_N
Table 14: UART Timing Specifications
Minimum Typical
Reference Characteristics
Maximum Unit
1
2
3
Delay time, BT_UART_CTS_N low to
BT_UART_TXD valid
–
–
–
–
1.5
0.5
0.5
Bit periods
Setup time, BT_UART_CTS_N high before –
midpoint of stop bit
Bit periods
Bit periods
Delay time, midpoint of stop bit to
BT_UART_RTS_N high
–
Broadcom®
September 9, 2014 • 89359-DS100-R
Page 51
BROADCOM CONFIDENTIAL