M32C83T datasheet(296/527 Pages) RENESAS

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Page 273

21. Intelligent I/O (Time Measurement Function)

)

(

Figure 21.23 Prescaler Function and Gate Function

fBTi(1)

Base timer i

TMijR bit(3)

GiTMj register

Internal time

measurement

trigger

Prescaler(2)

(1) With the prescaler function

(When the GiTPRj register (i=0, 1, j=6, 7) =0216, the PR bit in the GiTMCR register=1)

fBTi(1)

Base timer i

INPCij pin input

Internal time

measurement

trigger

IFEj bit in GiFE

GiPOk register

match signal

Gate control

signal(2)

GiTMj register

TMijR bit(3)

Value of the GiPOk register

This trigger input is disabled

due to the 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+12

NOTES:

1. If the CAS bit in the GiBCR1 register is set to "1" (32-bit time measurement), the group 1 base timer

increments the counter every time the group 0 base timer overflows.

2. This applies to the second or later prescaler cycles after the PR bit in the GiTMCRj register is set to "1".

3. Bits in the IIO0IR to IIO8IR, IIO10IR to IIO11IR registers. The TM0jR register if the CAS bit is set to "1".

(2) With the gate function

(The gate function is cleared by matching the base timer with the GiPOk register.

the GT bit in the GiTMCRj register=1, the GOC bit=1)

INPCij pin input

Gate

Gate cleared

n+12 n+13

Write "0" by program

if setting to "0"

Write "0" by program if setting to "0"

NOTES:

1. If the CAS bit in the GiBCR1 register is set to "1" (32-bit time measurement), the group 1 base timer

increments the counter every time the group 0 base timer overflows.

2. Bits in the IIO0IR to IIO8IR, IIO10IR to IIO11IR registers. The TM0jR register if the CAS bit is set to "1".

"H"

"L"

"H"

"L"

"1"

"0"

"1"

"0"

"H"

"L"

"H"

"L"

"H"

"L"

"H"

"L"

"1"

"0"

n+1

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