BCM20707 Preliminary Data Sheet
Peripheral Transport Unit
Peripheral Transport Unit
Broadcom Serial Communications Interface
The BCM20707 provides a 2-pin master BSC interface, which can be used to retrieve configuration information
from an external EEPROM or to communicate with peripherals such as trackball or touch-pad modules, and
2
motion tracking ICs used in mouse devices. The BSC interface is compatible with I C slave devices. BSC does
not support multimaster capability or flexible wait-state insertion by either master or slave devices.
The following transfer clock rates are supported by BSC:
•
•
•
•
100 kHz
400 kHz
2
800 kHz (Not a standard I C-compatible speed.)
2
1 MHz (Compatibility with high-speed I C-compatible devices is not guaranteed.)
The following transfer types are supported by BSC:
•
•
•
•
Read (Up to 127 bytes can be read.)
Write (Up to 127 bytes can be written.)
Read-then-Write (Up to 127 bytes can be read and up to 127 bytes can be written.)
Write-then-Read (Up to 127 bytes can be written and up to 127 bytes can be read.)
Hardware controls the transfers, requiring minimal firmware setup and supervision.
The clock pin (SCL) and data pin (SDA) are both open-drain I/O pins. Pull-up resistors external to the
BCM20707 are required on both the SCL and SDA pins for proper operation.
Broadcom®
Bluetooth SoC
Page 17
May 27, 2016 • 20707-DS206-R
BROADCOM CONFIDENTIAL
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