MC68HC908AS60MFN MOTOROLA [Motorola, Inc], MC68HC908AS60MFN Datasheet - Page 298

• Manufacturer Part Number: MC68HC908AS60MFN
• Description: HCMOS Microcontroller Unit
• Manufacturer: MOTOROLA [Motorola, Inc]

Modulo Timer (TIM)
19.8.2 TIM Counter Registers
Technical Data
298
NOTE:
Address: $004C
Address: $004D
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 TCNTH is read 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:
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 19-4. TIM Counter Registers (TCNTH–TCNTL)
Bit 15
Bit 7
Bit 7
Bit 7
0
0
Go to: www.freescale.com
= Unimplemented
Modulo Timer (TIM)
14
6
0
6
6
0
13
5
0
5
5
0
12
4
0
4
4
0
11
3
0
3
3
0
MC68HC908AS60 — Rev. 1.0
10
2
0
2
2
0
1
9
0
1
1
0
MOTOROLA
Bit 0
Bit 8
Bit 0
Bit 0
0
0