BCM20705 Datasheet, PDF (59/67 Pages) Cypress Semiconductor – Single-Chip Bluetooth Transceiver and Baseband Processor

BCM20705 Data Sheet
Timing and AC Characteristics
PCM Interface Timing
Table 22: PCM Interface Timing Specifications (Short Frame Synchronization, Master Mode)
Reference
1
2
3
4
5
6
7
8
9
Characteristics
PCM bit clock frequency
PCM bit clock HIGH time
PCM bit clock LOW time
Delay from PCM_BCLK rising edge to PCM_SYNC high
Delay from PCM_BCLK rising edge to PCM_SYNC low
Delay from PCM_BCLK rising edge to data valid on
PCM_OUT
Setup time for PCM_IN before PCM_BCLK falling edge
Hold time for PCM_IN after PCM_BCLK falling edge
Delay from falling edge of PCM_BCLK during last bit
period to PCM_OUT becoming high impedance
Minimum
128
128
209
–
–
–
50
10
–
Maximum Unit
2048
kHz
–
ns
–
ns
50
ns
50
ns
50
ns
–
ns
–
ns
50
ns
Figure 13: PCM Interface Timing (Short Frame Synchronization, Master Mode)
PCM_BCLK
4
PCM_SYNC
PCM_OUT
PCM_IN
1
5
Bit 15 (Previous Frame)
Bit 15 (Previous Frame)
2
6
Bit 0
7
8
Bit 0
3
9
Bit 15
HIGH
IMPEDENCE
Bit 15
Broadcom®
Bluetooth Transceiver and Baseband Processor
November 13, 2014 • MCS20705-DS104-R
Page 58
BROADCOM CONFIDENTIAL