7702 datasheet(128/217 Pages) RENESAS

128 / 217 page

TIMER A

7702/7703 Group User’s Manual

5–40

5.6 Pulse width modulation (PWM) mode

Fig. 5.6.1 Structures of timer Ai mode registers and timer Ai registers in PWM mode

Timer A0 register (Addresses 4716, 4616)

Timer A1 register (Addresses 4916, 4816)

Timer A2 register (Addresses 4B16, 4A16)

Timer A3 register (Addresses 4D16, 4C16)

Timer A4 register (Addresses 4F16, 4E16)

Functions

Bit

At reset

15 to 0 These bits can be set to “000016” to “FFFE16.”

Assuming that the set value = n, the “H” level

width of the PWM pulse output from the

TAiOUT pin is expressed as follows:

PWM pulse’s period is expressed as follows:

Undefined

(b15)

(b8)

n16 – 1

fi: Frequency of count source (f2, f16, f64, or f512)

(b15)

(b8)

Timer A0 register (Addresses 4716, 4616)

Timer A1 register (Addresses 4916, 4816)

Timer A2 register (Addresses 4B16, 4A16)

Timer A3 register (Addresses 4D16, 4C16)

Timer A4 register (Addresses 4F16, 4E16)

Functions

Bit

At reset

7 to 0

15 to 8

Undefined

These bits can be set to “0016” to “FF16.”

Assuming that the set value = m, PWM

pulse’s period output from the TAiOUT pin is

expressed as follows:

(m + 1)(28 – 1)

These bits can be set to “0016” to “FE16.”

Assuming that the set value = n, the “H” level

width of the PWM pulse output from the

TAiOUT pin is expressed as follows:

n(m + 1)

fi: Frequency of count source (f2, f16, f64, or f512)

Timer Ai mode register (i = 0 to 4) (Addresses 5616 to 5A16)

0 0 : f2

0 1 : f16

1 0 : f64

1 1 : f512

b7 b6

Count source select bits

At reset

Trigger select bits

Fix this bit to “1” in PWM mode.

Operating mode select bits

Bit name

Functions

1 1 : PWM mode

b1 b0

b4 b3

16/8-bit PWM mode select bit

0 0 : Writing “1” to count start bit

0 1 : (TAi IN pin functions as a pro-

grammable I/O port.)

1 0 : Falling edge of TAiIN pin’s input signal

1 1 : Rising edge of TAiIN pin’s input signal

Bit

0 : As a 16-bit pulse width modulator

1 : As an 8-bit pulse width modulator

7702 Datasheet(PDF) 128 Page - Renesas Technology Corp

7702 Datasheet(HTML) 128 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL