MC68HC08AZ60ACFU MOTOROLA [Motorola, Inc], MC68HC08AZ60ACFU Datasheet - Page 422
MC68HC08AZ60ACFU
Manufacturer Part Number
MC68HC08AZ60ACFU
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC08AZ60ACFU.pdf
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Timer Interface Module A (TIMA)
23.9.2 TIMA Counter Registers
Advance Information
422
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:
Write:
Read:
Write:
Figure 23-5. TIMA Counter Registers (TACNTH and TACNTL)
Register Name and Address TACNTH — $0022
Register Name and Address TACNTL — $0023
BIT 15
BIT 7
Bit 7
Bit 7
R
R
R
0
0
Timer Interface Module A (TIMA)
= Reserved
BIT 14
BIT 6
R
R
6
0
6
0
BIT 13
BIT 5
R
R
5
0
5
0
BIT 12
BIT 4
R
R
4
0
4
0
BIT 11
BIT 3
R
R
3
0
3
0
MC68HC08AZ60A — Rev 0.0
BIT 10
BIT 2
R
R
2
0
2
0
BIT 9
BIT 1
R
R
1
0
1
0
MOTOROLA
BIT 0
BIT 8
Bit 0
Bit 0
R
R
0
0
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