MEC1404 Datasheet, PDF (205/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
TABLE 12-3: RUNTIME REGISTER SUMMARY (CONTINUED)
Offset
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
Register Name (Mnemonic)
EC Address LSB Register
EC Address MSB Register
EC Data Byte 0 Register
EC Data Byte 1 Register
EC Data Byte 2 Register
EC Data Byte 3 Register
Interrupt Source LSB Register
Interrupt Source MSB Register
Interrupt Mask LSB Register
Interrupt Mask MSB Register
Application ID Register
12.9.1 HOST-TO-EC MAILBOX REGISTER
Offset ^00h
Bits
Description
Type
7:0 HOST_EC_MBOX
R/W
8-bit mailbox used communicate information from the system host
to the embedded controller. Writing this register generates an event
to notify the embedded controller.
The embedded controller has the option of clearing some or all of
the bits in this register. This is dependent on the protocol layer
implemented using the EMI Mailbox. The host must know this pro-
tocol to determine the meaning of the value that will be reported on
a read.
This bit field is aliased to the HOST_EC_MBOX bit field in the
HOST-to-EC Mailbox Register
Default
0h
Reset
Event
nSYSR
ST
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DS00001956D-page 205