MC68HC908QY2 MOTOROLA [Motorola, Inc], MC68HC908QY2 Datasheet - Page 144

• Manufacturer Part Number: MC68HC908QY2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Timer Interface Module (TIM)
10.10.3 TIM Counter Modulo Registers
144
MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
NOTE:
Address:
Address: $0022
Address: $0023
Address: $0024
The read/write TIM modulo registers contain the modulo value for the
TIM counter. When the TIM counter reaches the modulo value, the
overflow flag (TOF) becomes set, and the TIM counter resumes counting
from $0000 at the next timer clock. Writing to the high byte (TMODH)
inhibits the TOF bit and overflow interrupts until the low byte (TMODL) is
written. Reset sets the TIM counter modulo registers.
Reset the TIM counter before writing to the TIM counter modulo registers.
Reset:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Read:
Write:
Write:
Write:
Write:
Figure 10-6. TIM Counter Modulo Registers (TMODH:TMODL)
Figure 10-5. TIM Counter Registers (TCNTH:TCNTL)
$0021
Bit 15
Bit 7
Bit 7
Bit15
Bit 7
Bit 7
Bit 7
Bit7
0
0
1
1
Timer Interface Module (TIM)
TCNTH
TCNTL
= Unimplemented
TMODH
TMODL
Bit 14
Bit14
Bit 6
Bit6
6
0
6
0
6
1
6
1
Bit 13
Bit13
Bit 5
Bit5
5
0
5
0
5
1
5
1
Bit 12
Bit12
Bit 4
Bit4
4
0
4
0
4
1
4
1
Bit 11
Bit11
Bit 3
Bit3
3
0
3
0
3
1
3
1
Bit 10
Bit10
Bit 2
Bit2
2
0
2
0
2
1
2
1
Bit 9
Bit 1
Bit9
Bit1
1
0
1
0
1
1
1
1
MOTOROLA
Bit 0
Bit 0
Bit 8
Bit 0
Bit 0
Bit 0
Bit8
Bit0
0
0
1
1