mc68hc908jb8 Freescale Semiconductor, Inc, mc68hc908jb8 Datasheet - Page 192

• Manufacturer Part Number: mc68hc908jb8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Timer Interface Module (TIM)
11.10.2 TIM Counter Registers
Technical Data
192
NOTE:
TCNTH
TCNTL
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.
Reset:
Reset:
Read:
Read:
Write:
Write:
Figure 11-5. TIM Counter Registers (TCNTH:TCNTL)
Address: $000C
Address: $000D
Bit 15
Bit 7
Bit 7
Bit 7
0
0
Timer Interface Module (TIM)
= Unimplemented
Bit 14
Bit 6
6
0
6
0
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Bit 13
Bit 5
5
0
5
0
Bit 12
Bit 4
4
0
4
0
Bit 11
Bit 3
3
0
3
0
Bit 10
Bit 2
Freescale Semiconductor
2
0
2
0
Bit 9
Bit 1
1
0
1
0
Bit 0
Bit 8
Bit 0
Bit 0
0
0