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M38048FDHKP датащи(PDF) 168 Page - Renesas Technology Corp

номер детали M38048FDHKP
подробное описание детали  8-BIT CISC SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
PDF  387 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M38048FDHKP датащи(HTML) 168 Page - Renesas Technology Corp

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2-44
APPLICATION
2.3 Timer
Rev.1.00 Jan 14, 2005
REJ09B0212-0100Z
3804 Group (Spec.H)
Fig. 2.3.28 Control procedure (2)
RTI
(A)
Measurement result (high-order 8 bits)
(A)
Measurement result (low-order 8 bits)
TZH
(A)
TZL
(A)
FFFF16
000016
Count start of
Timer Z
T1 value: Valid
CNTR2
T1
T2
FFFF16
000016
CNTR2
T1
T2
CNTR2 interrupt process routine (Note 1)
CLT (Note 2)
CLD (Note 3)
Push registers to stack
Pop registers
Notes 2: When using Index X mode flag (T)
3: When using Decimal mode flag (D)
•Pushing registers used in interrupt process routine
•Popping registers pushed to stack
•Count value read and storing it to RAM
Note 1: The first value becomes invalid depending on start timing of Timer Z count shown
by the following figure.
Process it by software as necessary.
[ Example 1] • Start Timer Z count when CNTR2 input level is “L”.
(CNTR2 input level can be checked by reading the contents of sharing port P47 register.)
CNTR2 interrupt
T2 value: Valid
CNTR2 interrupt
[ Example 2] • Start Timer Z count when CNTR2 input level is “H”.
Invalidate the first CNTR2 interrupt after start of Timer Z count.
Count start of
Timer z
T1 value: Invalid
CNTR2 interrupt
CNTR2 interrupt
T2 value: Valid



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