HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 337
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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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3. Initialization
Table 11.41 Registers and Counters Requiring Initialization
Note: The TGRC_3 set value must be the sum of 1/2 the PWM carrier cycle set in TCBR and
4. PWM Output Level Setting
5. Dead Time Setting
Register/Counter
TGRC_3
TDDR
TCBR
TGRD_3, TGRC_4, TGRD_4
TCNT_4
In complementary PWM mode, there are six registers that must be initialized.
Before setting complementary PWM mode with bits MD3 to MD0 in the timer mode register
(TMDR), the following initial register values must be set.
TGRC_3 operates as the buffer register for TGRA_3, and should be set with 1/2 the PWM
carrier cycle + dead time Td. The timer cycle buffer register (TCBR) operates as the buffer
register for the timer cycle data register (TCDR), and should be set with 1/2 the PWM carrier
cycle. Set dead time Td in the timer dead time data register (TDDR).
Set the respective initial PWM duty values in buffer registers TGRD_3, TGRC_4, and
TGRD_4.
The values set in the five buffer registers excluding TDDR are transferred simultaneously to
the corresponding compare registers when complementary PWM mode is set.
Set TCNT_4 to H'0000 before setting complementary PWM mode.
In complementary PWM mode, the PWM pulse output level is set with bits OLSN and OLSP
in the timer output control register (TOCR).
The output level can be set for each of the three positive phases and three negative phases of 6-
phase output.
Complementary PWM mode should be cleared before setting or changing output levels.
In complementary PWM mode, PWM pulses are output with a non-overlapping relationship
between the positive and negative phases. This non-overlap time is called the dead time.
The non-overlap time is set in the timer dead time data register (TDDR). The value set in
TDDR is used as the TCNT_3 counter start value, and creates non-overlap between TCNT_3
and TCNT_4. Complementary PWM mode should be cleared before changing the contents of
TDDR.
dead time Td set in TDDR.
Set Value
Dead time Td
1/2 PWM carrier cycle
Initial PWM duty value for each phase
H'0000
1/2 PWM carrier cycle + dead time Td
11.
Rev.4.00 Mar. 27, 2008 Page 293 of 882
Multi-Function Timer Pulse Unit (MTU)
REJ09B0108-0400
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