XC68HC05P18A Motorola, XC68HC05P18A Datasheet - Page 66

• Manufacturer Part Number: XC68HC05P18A
• Description: HCMOS Microcontroller Unit
• Manufacturer: Motorola

16-Bit Timer
Technical Data
66
Address:
Address:
Address:
Address:
The timer registers and alternate counter registers can be read at any
time without affecting their values. However, the alternate counter
registers differ from the timer registers in one respect: A read of the timer
register MSB can clear the timer overflow flag (TOF). Therefore, the
alternate counter registers can be read at any time without the possibility
Reset:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Read:
Write:
Write:
Write:
Write:
Figure 8-3. Alternate Counter Registers (ACRH/ACRL)
Figure 8-2. Timer Counter Registers (TMRH/TMRL)
TMRH7
ACRH7
TMRL7
ACRL7
$001A
$001B
$0018
$0019
Bit 7
Bit 7
Bit 7
Bit 7
1
1
1
1
= Unimplemented
= Unimplemented
TMRH6
TMRL6
ACRH6
ACRL6
6
1
6
1
6
1
6
1
16-Bit Timer
TMRH5
ACRH5
TMRL5
ACRL5
5
1
5
1
5
1
5
1
TMRH4
ACRH4
TMRL4
ACRL4
4
1
4
1
4
1
4
1
TMRH3
ACRH3
TMRL3
ACRL3
3
1
3
1
3
1
3
1
TMRH2
ACRH2
TMRL2
ACRL2
2
1
2
1
2
1
2
1
TMRH1
TMRL1
ACRH1
ACRL1
MC68HC05P18A
1
1
1
1
1
1
1
1
MOTOROLA
TMRH0
ACRH0
TMRL0
ACRL0
Bit 0
Bit 0
Bit 0
Bit 0
1
1
1
1