M32CSLASH86 datasheet(170/505 Pages) RENESAS

170 / 505 page

Page 147

15. Timer (Timer A)

)

(

Timer Ai Register (i=0 to 4)(1)

Symbol

Address

After Reset

TA0 to TA2

034716-034616, 034916-034816, 034B16-034A16

Indeterminate

TA3, TA4

034D16-034C16, 034F16-034E16

Indeterminate

Timer Mode

000016 to FFFF16

000016 to FFFF16(3)

000016 to FFFE16(3)

0016 to FE16(3)

(High-order

address bits)

0016 to FF16(3)

(Low-order

address bits)

Event Counter

Mode(2)

One-Shot Timer

Mode(4)

Pulse Width

Modulation Mode(5)

(16-Bit PWM)

Pulse Width

Modulation Mode(5)

(8-Bit PWM)

Function

Setting Range

Mode

If setting value is n, count source

is divided by n+1.

If setting value is n, count source

is divided by FFFF16 - n+1 when

the counter is incremented

and by n+1 when the counter is

decremented.

If count source frequency is fj

and setting value of the TAi

PWM cycle: (216-1) / fj

"H" width of PWM pulse: n / fj

If count source frequency is fj,

setting value of high-order bits in

the TAi register is n and setting

value of low-order bits in the TAi

PWM cycle: (28-1)x(m+1) / fj

"H" width of PWM pulse: (m+1)n / fj

If setting value is n, count source

is divided by n, then stops.

b15

b8 b7

fj : f1, f8, f2n, fC32

NOTES:

1. Use 16-bit data for reading and writing.

2. The TAi register counts how many pulse inputs are provided externally or how many times another

timer counter overflows and underflows.

3. Use the MOV instruction to set the TAi register.

4. When the TAi register is set to "000016", the timer counter does not start and the timer Ai interrupt

request is not generated.

5. When the TAi register is set to "000016", the pulse width modulator does not operate and the TAiOUT

pin is held "L". The TAi interrupt request is also not generated. The same situation occurs in 8-bit

pulse width modulator mode if the 8 high-order bits in the TAi register are set to "0016".

Figure 15.4 TA0 to TA4 Registers

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