M16CSLASH29 datasheet(184/499 Pages) RENESAS

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13. Timer S

page 160

Figure 13.21 Prescaler Function and Gate Function

NOTE:

1. Bits in the G1IR register.

G1IRj bit (1)

fBT1

Base timer

G1IRj bit (2)

G1TMj register

Internal time

measurement trigger

Prescaler (1)

(a) With the prescaler function

(When the G1TPRj register (j = 6, 7) is set to 0216, the PR bit in the G1TMCRj register (j = 6, 7) is set to 1)

Base timer

INPC1j pin input or

trigger signal after

passing the digital

filter

Internal time

measurement trigger

IFEj bit in G1FE

G1POk register

match signal

Gate control signal

G1TMj register

Value of the G1POk register

This trigger input is disabled

due to gate function.

FFFF16

000016

n-2

n-1

n+2 n+3 n+4 n+5 n+6 n+7 n+8 n+9 n+10 n+11

n+14

n+1

n+13

(b) With the gate function

(The gate function is cleared by matching the base timer with the G1POk register(k = 4, 5),

the GT bit in the G1TMCRj register is set to 1, the GOC bit is set to 1)

INPC1j pin input or

trigger signal after

passing the digital

filter

Set 0 by program if necessary

Gate

Gate cleared

n+1

+12 n+13

NOTES:

1. This applies to 2nd or later prescaler cycle after the PR bit in the G1TMCRj register is set to 1 (prescaler used).

2. Bits in the G1IR register.

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