M32CSLASH86 datasheet(181/505 Pages) RENESAS

181 / 505 page

Page 158

15. Timer (Timer A)

)

(

15.1.3 One-Shot Timer Mode

In one-shot timer mode, the timer operates only once for each trigger (see Table 15.6). Once a trigger

occurs, the timer starts and continues operating for a desired period. Figure 15.12 shows the TAiMR

Table 15.6 One-Shot Timer Mode Specifications

Item

Specification

Count Source

f1, f8, f2n(1), fC32

Counting Operation

• The timer decrements a counter value

When the timer counter reaches "000016", it stops counting after reloading.

If a trigger occurs while counting, content of the reload register is reloaded into the

count register and counting resumes.

Divide Ratio

1/n

n : setting value of the TAi register (i=0 to 4) 000016 to FFFF16,

but the timer counter does not run if n=000016

Counter Start Condition

The TAiS bit in the TABSR register is set to "1" (starts counting) and following triggers

occur:

• External trigger input is provided

• Timer counter overflows or underflows

• The TAiOS bit in the ONSF register is set to "1" (timer started)

Counter Stop Condition

• After the timer counter has reached "000016" and is reloaded

• When the TAiS bit is set to "0" (stops counting)

Interrupt Request Generation Timing The timer counter reaches "000016"

TAiIN Pin Function

Programmable I/O port or trigger input

TAiOUT Pin Function

Programmable I/O port or pulse output

Read from Timer

The value in the TAi register is indeterminate when read

Write to Timer

• When the timer counter stops, the value written to the TAi register is also written to

both reload register and counter

• While counting, the value written to the TAi register is written to the reload register

(It is transferred to the counter at the next reload timing)

NOTES:

1. The CNT3 to CNT0 bits in the TCSPR register select no division (n=0) or divide-by-2n (n=1 to 15).

M32C/86 데이터시트(PDF) 181 Page - Renesas Technology Corp

M32C/86 데이터시트(HTML) 181 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

데이터시트 다운로드

링크 URL