M32C83T datasheet(295/527 Pages) RENESAS

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Page 272

21. Intelligent I/O (Time Measurement Function)

)

(

Figure 21.22 Time Measurement Function (2)

n-2

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n+9 n+10 n+11 n+12 n+13 n+14

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Delayed by max. 1 clock

fBTi(1)

Base timer i

INPCij pin input

GiTMj register

(1)

When selecting the rising edge as a time measurement trigger

(The CTS1 to CTS0 bits in the GiTMCR register (i=0,1, j=0 to 7)=012)

TMijR bit(2)

NOTES:

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

increments counter every time the group 0 base timer overflows.

2. Bits in the IIO0IR to IIO8IR, IIO10IR to IIO11R registers. The TM0jR bit if the CAS bit is set to "1".

3. Input pulses applied to the INPCij pin require 1.5 fBTi clock cycles or more.

(Note 3)

(2)

When selecting both edges as a time measurement trigger

(The CTS1 to CTS0 bits=112)

Maximum 3.5 fi or fBTi(1)

clock cycles

(3) Trigger signal when using the digital filter

(The DF1 to DF0 bits in the GiTMCR register =102 or 112)

Signal, which does not match

three times, is stripped off

fBTi(1)

Base timer i

INPCij pin input

GiTMj register

TMijR bit(2)

fi or fBTi(1)

INPCij pin

Trigger signal

after passing the

digital filter

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 whenever the group 0 base timer overflows.

2. Bits in the IIO0IR to IIO8IR, IIO10IR to IIO11R registers. The TM0jR register if the CAS bit is set to "1".

3. No interrupt is generated if the microcomputer receives a trigger signal when the TMijR bit is set to "1".

Howver, the value of the GiTMj register changes.

NOTES:

1. fBTi when the DF1 to DF0 bits are set to "102", and f1 when to "112".

The trigger signal is delayed

by the digital filter

Write "0" by program

if setting to "0"

Write "0" by program

if setting to "0"

n+5

n+6

(Note 3)

"H"

"L"

"H"

"L"

"1"

"0"

"1"

"0"

"H"

"L"

"H"

"L"

nn+2

n+5

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n+12

n+6

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