MEC1404 Datasheet, PDF (278/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
TABLE 17-4: CONFIGURATION REGISTER SUMMARY
Offset
30h
F0h
Register Name (Mnemonic)
Activate Register
Configuration Select Register
17.10.1 ACTIVATE REGISTER
Offset ^30h
Bits
Description
Type
7:1 Reserved
R
0 ACTIVATE
R/W
When this bit is 1, the UART logical device is powered and func-
tional. When this bit is 0, the UART logical device is powered down
and inactive.
Default
-
0b
Reset
Event
-
RESET
17.10.2 CONFIGURATION SELECT REGISTER
Offset ^F0h
Bits
Description
Type
7:3 Reserved
R
2 POLARITY
R/W
1=The UART_TX and UART_RX pins functions are inverted
0=The UART_TX and UART_RX pins functions are not inverted
1 POWER
R/W
1=The RESET reset signal is derived from nSIO_RESET
0=The RESET reset signal is derived from nSYSRST
0 CLK_SRC
R/W
1=The UART Baud Clock is derived from an external clock source
0=The UART Baud Clock is derived from one of the two internal
clock sources
Default
-
0b
Reset
Event
-
RESET
1b
RESET
0b
RESET
DS00001956D-page 278
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