MMC2107 - Freescale Semiconductor

Freescale Semiconductor, Inc.
Programmable Interrupt Timer Modules (PIT1 and PIT2)
Memory Map and Registers
OVW — Overwrite Bit
The read/write OVW bit enables writing to PMR to immediately
overwrite the value in the PIT counter.
1 = Writing PMR immediately replaces value in PIT counter.
0 = Value in PMR replaces value in PIT counter when count
reaches 0x0000.
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PIE — PIT Interrupt Enable Bit
The read/write PIE bit enables the PIF flag to generate interrupt
requests.
1 = PIF interrupt requests enabled
0 = PIF interrupt requests disabled
PIF — PIT Interrupt Flag
The read/write PIF flag is set when the PIT counter reaches 0x0000.
Clear PIF by writing a 1 to it or by writing to PMR. Writing 0 has no
effect. Reset clears PIF.
1 = PIT count has reached 0x0000.
0 = PIT count has not reached 0x0000.
RLD — Reload Bit
The read/write RLD bit enables loading the value of PMR into the PIT
counter when the count reaches 0x0000.
1 = Counter reloaded from PMR on count of 0x0000
0 = Counter rolls over to 0xFFFF on count of 0x0000
EN — PIT Enable Bit
The read/write EN bit enables PIT operation. When the PIT is
disabled, the counter and prescaler are held in a stopped state.
1 = PIT enabled
0 = PIT disabled
MMC2107 – Rev. 2.0
Technical Data
MOTOROLA Programmable Interrupt Timer Modules (PIT1 and PIT2) 287
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