MEC1404 Datasheet, PDF (295/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
The Base Address indicates where the first register can be accessed in a particular address space for a block instance.
TABLE 18-2: RUNTIME REGISTER SUMMARY
Offset
00h
04h
08h
0Ch
10h
Register Name
Timer Count Register
Timer Preload Register
Timer Status Register
Timer Int Enable Register
Timer Control Register
18.9.1 TIMER COUNT REGISTER
Offset ^00h
Bits
Description
Type
31:0 COUNTER
R/W
This is the value of the Timer counter. This is updated by Hardware
but may be set by Firmware. If it is set while the Hardware Timer is
operating, functionality can not be ensured. When read, it is buff-
ered so single byte reads will be able to catch the full 4 byte regis-
ter without it changing.
The size of the Counter is indicated by the instance name. Bits 0 to
(size-1) are r/w counter bits. Bits 31 down to size are reserved.
Reads return 0 and writes have no effect.
18.9.2 TIMER PRELOAD REGISTER
Default
0h
Reset
Event
Tim-
er_Re-
set
Offset ^04h
Bits
Description
Type
31:0 PRE_LOAD
R/W
This is the value of the Timer pre-load for the counter. This is used
by H/W when the counter is to be restarted automatically; this will
become the new value of the counter upon restart.
The size of the Pre-Load value is the same as the size of the
counter. The size of the Counter is indicated by the instance name.
Bits 0 to (size-1) are r/w pre-load bits. Bits 31 down to size are
reserved. Reads return 0 and writes have no effect.
Default
0h
Reset
Event
Tim-
er_Re-
set
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DS00001956D-page 295