MMC2107 Datasheet, PDF (288/618 Pages) –

Freescale Semiconductor, Inc.
Programmable Interrupt Timer Modules (PIT1 and PIT2)
14.6.2.2 PIT Modulus Register
The 16-bit read/write PIT modulus register (PMR) contains the timer
modulus value for loading into the PIT counter when the count reaches
0x0000 and the RLD bit is set.
When the OVW bit is set, PMR is transparent, and the value written to
PMR is immediately loaded into the PIT counter. The prescaler counter
is reset anytime a new value is loaded into the PIT counter and also
during reset. Reading the PMR returns the value written in the modulus
latch. Reset initializes PMR to 0xFFFF.
Address: PIT1 — 0x00c8_0002 and 0x00c8_0003
PIT2 — 0x00c9_0002 and 0x00c9_0003
Bit 15
14
13
12
11
10
9
Bit 8
Read:
PM15 PM14 PM13 PM12 PM11 PM10 PM9
PM8
Write:
Reset: 1
1
1
1
1
1
1
1
Bit 7
6
5
4
3
2
1
Bit 0
Read:
PM7
PM6
PM5
PM4
PM3
PM2
PM1
PM0
Write:
Reset: 1
1
1
1
1
1
1
1
Figure 14-3. PIT Modulus Register (PMR)
Technical Data
288
Programmable Interrupt Timer Modules (PIT1 and PIT2)
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MMC2107 – Rev. 2.0
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