MC68HC908JK3 MOTOROLA [Motorola, Inc], MC68HC908JK3 Datasheet - Page 129

• Manufacturer Part Number: MC68HC908JK3
• Description: MC68HC908JK1
• Manufacturer: MOTOROLA [Motorola, Inc]

10.10.2 TIM Counter Registers (TCNTH:TCNTL)
MC68H(R)C908JL3
MOTOROLA
NOTE:
—
Rev. 1.0
The two read-only TIM counter registers contain the high and low bytes
of the value in the TIM counter. Reading the high byte (TCNTH) latches
the contents of the low byte (TCNTL) into a buffer. Subsequent reads of
TCNTH do not affect the latched TCNTL value until TCNTL is read.
Reset clears the TIM counter registers. Setting the TIM reset bit (TRST)
also clears the TIM counter registers.
If you read TCNTH during a break interrupt, be sure to unlatch TCNTL
by reading TCNTL before exiting the break interrupt. Otherwise, TCNTL
retains the value latched during the break.
PS2
0
0
0
0
1
1
1
1
PS1
0
0
1
1
0
0
1
1
Timer Interface Module (TIM)
PS0
0
1
0
1
0
1
0
1
Table 10-2. Prescaler Selection
Internal Bus Clock ÷ 1
Internal Bus Clock ÷ 2
Internal Bus Clock ÷ 4
Internal Bus Clock ÷ 8
Internal Bus Clock ÷ 16
Internal Bus Clock ÷ 32
Internal Bus Clock ÷ 64
TIM Clock Source
Not available
Timer Interface Module (TIM)
Technical Data
I/O Registers
129