MC68HC908AS60MFN MOTOROLA [Motorola, Inc], MC68HC908AS60MFN Datasheet - Page 395
MC68HC908AS60MFN
Manufacturer Part Number
MC68HC908AS60MFN
Description
HCMOS Microcontroller Unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AS60MFN.pdf
(454 pages)
- Current page: 395 of 454
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22.9.2 TIMA Counter Registers
MC68HC908AS60 — Rev. 1.0
MOTOROLA
NOTE:
The two read-only TIMA counter registers contain the high and low bytes
of the value in the TIMA counter. Reading the high byte (TACNTH)
latches the contents of the low byte (TACNTL) into a buffer. Subsequent
reads of TACNTH do not affect the latched TACNTL value until TACNTL
is read. Reset clears the TIMA counter registers. Setting the TIMA reset
bit (TRST) also clears the TIMA counter registers.
If TACNTH is read during a break interrupt, be sure to unlatch TACNTL
by reading TACNTL before exiting the break interrupt. Otherwise,
TACNTL retains the value latched during the break.
Reset:
Reset:
Read:
Read:
Write:
Write:
Register Name and Address: TCNTH — $0022
Register Name and Address: TCNTL — $0023
Freescale Semiconductor, Inc.
Figure 22-5. TIMA Counter Registers (TCNTH and TCNTL)
For More Information On This Product,
Bit 15
Bit 7
Bit 7
Bit 7
Timer Interface Module A (TIMA-6)
R
R
R
0
0
Go to: www.freescale.com
= Reserved
14
R
R
6
0
6
6
0
13
R
R
5
0
5
5
0
12
R
R
4
0
4
4
0
11
Timer Interface Module A (TIMA-6)
R
R
3
0
3
3
0
10
R
R
2
0
2
2
0
R
R
1
9
0
1
1
0
Technical Data
I/O Registers
Bit 0
Bit 8
Bit 0
Bit 0
R
R
0
0
395
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