HD6437101 RENESAS [Renesas Technology Corp], HD6437101 Datasheet - Page 406
HD6437101
Manufacturer Part Number
HD6437101
Description
32-Bit RISC Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6437101.pdf
(560 pages)
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Section 13 Motor Management Timer (MMT)
(2) Register Operation
In the operating modes, four buffer registers and ten compare registers are used.
The registers that are constantly compared with the TCNT counter are TGRU, TGRV, and
TGRW. In addition, TGRUU, TGRVU, TGRWU, and TPDR are compared with TCNT when
TCNT is counting up, and TGRUD, TGRVD, TGRWD are compared with TCNT when TCNT is
counting down. The buffer register for TPDR is TPBR; the buffer register for TGRUU, TGRU,
and TGRUD is TBRU; the buffer register for TGRVU, TGRV, and TGRVD is TBRV; and the
buffer register for TGRWU, TGRW, and TGRWD is TBRW.
To change compare register data, the new data should be written to the corresponding buffer
register. The buffer registers can be read from or written to at all times. Data written to the buffer
operation addresses for TPBR and TBRU to TBRW is transferred at the timing specified by bits
MD1 and MD0 in the timer mode register (TMDR). Data written to the free operation addresses
for TBRU to TBRW is transferred immediately.
After data transfer is completed, the relationship between the compare registers and buffer
registers is as follows:
TGRU (TGRV, TGRW) value = TBRU (TBRV, TBRW) value + Td (Td: value set in TDDR)
TGRUU (TGRVU, TGRWU) value = TBRU (TBRV, TBRW) value + 2Td
TGRUD (TGRVD, TGRWD) value = TBRU (TBRV, TBRW) value
TPDR value = TPBR value + 2Td
The values of TBRU to TBRW should always be set in the range H'0000 to H'FFFF – 2Td, and the
value of TPBR should always be set in the range H'0000 to H'FFFF – 4Td.
Figure 13.4 shows examples of counter and register operations.
Rev.1.00 Sep. 18, 2008 Page 372 of 522
REJ09B0069-0100
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