HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 353
HD6417144
Manufacturer Part Number
HD6417144
Description
32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417144.pdf
(930 pages)
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Complementary PWM Mode Output Protection Function:
Complementary PWM mode output has the following protection functions.
1. Register and counter miswrite prevention function
2. Halting of PWM output by external signal
3. Halting of PWM output when oscillator is stopped
With the exception of the buffer registers, which can be rewritten at any time, access by the
CPU can be enabled or disabled for the mode registers, control registers, compare registers,
and counters used in complementary PWM mode by means of the MTURWE bit in the bus
controller’s bus control register 1 (BCR1). The applicable registers are some (21 in total) of the
registers in channels 3 and 4 shown in the following:
⎯
This function enables miswriting due to CPU runaway to be prevented by disabling CPU
access to the mode registers, control registers, and counters. When the applicable registers are
read in the access-disabled state, undefined values are returned. Writing to these registers is
ignored.
The 6-phase PWM output pins can be set automatically to the high-impedance state by
inputting specified external signals. There are four external signal input pins.
See section 11.9, Port Output Enable (POE), for details.
If it is detected that the clock input to this LSI has stopped, the 6-phase PWM output pins
automatically go to the high-impedance state. The pin states are not guaranteed when the clock
is restarted.
See section 4.2, Function for Detecting Oscillator Halt.
TIORL_4, TIER_3 and TIER_4, TCNT_3 and TCNT_4, TGRA_3 and TGRA_4, TGRB_3
and TGRB_4, TOER, TOCR, TGCR, TCDR, and TDDR.
TCR_3 and TCR_4, TMDR_3 and TMDR_4, TIORH_3 and TIORH_4, TIORL_3 and
11.
Rev.4.00 Mar. 27, 2008 Page 309 of 882
Multi-Function Timer Pulse Unit (MTU)
REJ09B0108-0400
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