BCM89071A1CUBXGT Datasheet, PDF (56/69 Pages) Cypress Semiconductor – Single-Chip Automotive Grade Bluetooth Transceiver and Baseband Processor

BCM89071 Data Sheet
Timing and AC Characteristics
VDDIO, VBAT,REG_EN*
VREG
Internal POR
GPIO5 (CLK_REQ)
TCXO
LPO
Figure 10: Startup Timing from Power-on Reset
trampmax = 200 μs
VDDC > 0.8V
t = 300 μs
tmin= 1.5 ms
t = 64 to 171 μs
tmax = 4.2 ms
UART Timing
Table 21: UART Timing Specifications
Reference Characteristics
1
Delay time, UART_CTS_N low to UART_TXD valid
Minimum
–
2
Setup time, UART_CTS_N high before midpoint of stop bit –
3
Delay time, midpoint of stop bit to UART_RTS_N high –
Maximum
24
10
2
Unit
Baudout
cycles
ns
Baudout
cycles
Figure 11: UART Timing
UART_CTS_N
1
UART_TXD
UART_RXD
UART_RTS_N
Midpoint of STOP
bit
3
2
Midpoint of STOP
bit
Broadcom^®
April 16, 2015 • 89071-DS106-R
Baseband Transceiver and Baseband Processor
Page 55