MC68HC908AZ32ACFU MOTOROLA [Motorola, Inc], MC68HC908AZ32ACFU Datasheet - Page 341

• Manufacturer Part Number: MC68HC908AZ32ACFU
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

20.8.2 TIM Counter Registers
68HC908AZ32A — Rev 0.0
MOTOROLA
NOTE:
PPS[2:0] — Prescaler Select Bits
The two read-only PIT counter registers contain the high and low bytes
of the value in the PIT counter. Reading the high byte (PCNTH) latches
the contents of the low byte (PCNTL) into a buffer. Subsequent reads of
PCNTH do not affect the latched PCNTL value until PCNTL is read.
Reset clears the PIT counter registers. Setting the PIT reset bit (PRST)
also clears the PIT counter registers.
If you read PCNTH during a break interrupt, be sure to unlatch PCNTL
by reading PCNTL before exiting the break interrupt. Otherwise, PCNTL
retains the value latched during the break
Freescale Semiconductor, Inc.
These read/write bits select one of the seven prescaler outputs as the
input to the PIT counter as
PPS[2:0] bits.
For More Information On This Product,
PPS[2:0]
000
001
010
100
101
011
110
Programmable Interrupt Timer (PIT)
111
Go to: www.freescale.com
Table 20-2. Prescaler Selection
Table 20-2
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock 1
PIT Clock Source
shows. Reset clears the
Programmable Interrupt Timer (PIT)
16
32
64
64
2
8
Advance Information
4
I/O Registers
341