User's Manual

BT860
Datasheet
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Figure 11: I
2
S Receiver Timing
8.5. BSC (Cypress Serial Control) Master Interface
BT860 includes a Cypress Serial Control (BSC) master interface. The BSC interface supports low-speed and fast
mode devices and is compatible with I
2
C slave devices. Multiple I
2
C master devices and flexible wait state
insertion by the master interface or slave devices are not supported. The BT860 provides 400 kHz, full speed
clock support.
The BSC interface is programmed by the CPU to generate the following BSC transfer types on the bus:
 Read-only
 Write-only
 Combined read/write
 Combined write-read
NVRAM may contain configuration information about the customer application, including the following:
 Fractional-N information
 BD_ADDR
 UART baud rate
 USB enumeration information
 SDP service record
 File system information used for code, code patches, or data
Figure 12 and Table 18 define the timing requirements for the BSC interface.
Figure 12: BSC Interface Timing Diagram