MEC1322 Datasheet, PDF (358/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
31.0 BC-LINK MASTER
31.1 Overview
This block provides BC-Link connectivity to a slave device. The BC-Link protocol includes a start bit to signal the
beginning of a message and a turnaround (TAR) period for bus transfer between the Master and Companion devices.
31.2 References
No references have been cited for this feature.
31.3 Terminology
There is no terminology defined for this section.
31.4 Interface
This block is designed to be accessed externally via the pin interface and internally via a registered host interface.
FIGURE 31-1:
I/O DIAGRAM OF BLOCK
Interface
BC-Link Master
Signal Description
Power, Clocks and Reset
Interrupts
31.5 Signal Description
TABLE 31-1: SIGNAL DESCRIPTION TABLE
Name
Direction
Description
BCM_CLK
BCM_DAT
BCM_INT#
Output
Input/Output
Input
BC-Link output clock
Bidirectional data line
Input from the companion device
Note: A weak pull-up resistor is recommended on the data line (100KΩ).
DS00001719D-page 358
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