Chapter 7 16-bit Timer

The timer 7 preset register 1 and 2 are buffer registers of the timer 7 compare register 1 and 2. If the set value is written to the timer 7 preset register 1 and 2 when the counting is stopped, the same set value is loaded to the timer 7 compare register 1 and 2. If the set value is written to the timer 7 preset register 1 and 2 when the counting is operated, the set value of the timer 7 preset register 1 and 2 is loaded to the timer 7 compare register 1 and 2 at the timing that the timer 7 binary counter is cleared.

„Timer 7 Preset Register 1 (TM7PR1)

7

6

5

4

3

2

1

0

TM7PR1L

TM7PR1L7

TM7PR1L6

TM7PR1L5

TM7PR1L4

TM7PR1L3

TM7PR1L2

TM7PR1L1

TM7PR1L0

 

 

 

 

 

 

 

 

 

( At reset : X X X X X X X X )

Figure 7-2-5 Timer 7 Preset Register 1 Lower 8 bits (TM7PR1L : x'03F74', R/W)

TM7PR1H

7

6

5

4

3

2

1

0

TM7PR1H7 TM7PR1H6 TM7PR1H5 TM7PR1H4 TM7PR1H3 TM7PR1H2 TM7PR1H1 TM7PR1H0

( At reset : X X X X X X X X )

Figure 7-2-6 Timer 7 Preset Register 1 Upper 8 bits (TM7PR1H : x'03F75', R/W)

„Timer 7 Preset Register 2 (TM7PR2)

7

6

5

4

3

2

1

0

TM7PR2L

TM7PR2L7

TM7PR2L6

TM7PR2L5

TM7PR2L4

TM7PR2L3

TM7PR2L2

TM7PR2L1

TM7PR2L0

 

 

 

 

 

 

 

 

 

( At reset : X X X X X X X X )

Figure 7-2-7 Timer 7 Preset Register 2 Lower 8 bits (TM7PR2L : x'03F7C', R/W)

TM7PR2H

7

6

5

4

3

2

1

0

TM7PR2H7 TM7PR2H6 TM7PR2H5 TM7PR2H4 TM7PR2H3 TM7PR2H2 TM7PR2H1 TM7PR2H0

( At reset : X X X X X X X X )

Figure 7-2-8 Timer 7 Preset Register 2 Upper 8 bits (TM7PR2H : x'03F7D', R/W)

When data load timing from 16-bit timer preset register to compare register matches to write timing to preset register with instruction, correct value may not be loaded to the compare register. Therefore, write to preset register should be done while timer is stopped or within timer interrupt processing.

And use MOVW instruction for write to preset register.

VII - 6 Control Registers

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Panasonic MN101C77C, F77G Timer 7 Preset Register 1 Lower 8 bits TM7PR1L x03F74, R/W, „Timer 7 Preset Register 2 TM7PR2