MMC2107 - Freescale Semiconductor

Freescale Semiconductor, Inc.
Programmable Interrupt Timer Modules (PIT1 and PIT2)
Memory Map and Registers
14.6.2.3 PIT Count Register
The 16-bit, read-only PIT control register (PCNTR) contains the counter
value. Reading the 16-bit counter with two 8-bit reads is not guaranteed
to be coherent. Writing to PCNTR has no effect, and write cycles are
terminated normally.
Address: PIT1 — 0x00c8_0004 and 0x00c8_0005
PIT2 — 0x00c9_0004 and 0x00c9_0005
nc...
Freescale Semiconductor, I
Bit 15 14 13 12 11 10 9 Bit 8
Read: PC15 PC14 PC13 PC12 PC11 PC10 PC9 PC8
Write:
Reset: 1 1 1 1 1 1 1 1
Bit 7 6 5 4 3 2 1 Bit 0
Read: PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0
Write:
Reset: 1 1 1 1 1 1 1 1
= Writes have no effect and the access terminates without a transfer error exception.
Figure 14-4. PIT Count Register (PCNTR)
MMC2107 – Rev. 2.0
Technical Data
MOTOROLA Programmable Interrupt Timer Modules (PIT1 and PIT2) 289
For More Information On This Product,
Go to: www.freescale.com