XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 349

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

MC68HC908AZ60A — Rev 2.0
MOTOROLA
NOTE:
NOTE:
Do not set the PSTOP bit before entering wait mode if the PIT is required
to exit wait mode.
PRST — PIT Reset Bit
Setting the PSTOP and PRST bits simultaneously stops the PIT counter
at a value of $0000.
PPS[2:0] — Prescaler Select Bits
Setting this write-only bit resets the PIT counter and the PIT prescaler.
Setting PRST has no effect on any other registers. Counting resumes
from $0000. PRST is cleared automatically after the PIT counter is
reset and always reads as logic zero. Reset clears the PRST bit.
These read/write bits select one of the seven prescaler outputs as the
input to the PIT counter as
PPS[2:0] bits.
1 = Prescaler and PIT counter cleared
0 = No effect
PPS[2:0]
000
001
010
011
100
101
110
Programmable Interrupt Timer (PIT)
111
Table 21-2. Prescaler Selection
Table 21-2
Internal Bus Clock ÷ 16
Internal Bus Clock ÷ 32
Internal Bus Clock ÷ 64
Internal Bus Clock ÷ 64
Internal Bus Clock ÷ 4
Internal Bus Clock ÷ 2
Internal Bus Clock ÷ 8
Internal Bus Clock ÷ 1
PIT Clock Source
Programmable Interrupt Timer (PIT)
shows. Reset clears the
Technical Data
I/O Registers
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