HD6432646 Hitachi, HD6432646 Datasheet - Page 654

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

17.2.6
Bit
Initial value
Read/Write
There are four PWDTR1x registers (PWDTR1A, 1C, 1E, 1G). PWDTR1A is used for outputs
PWM1A and PWM1B, PWDTR1C for outputs PWM1C and PWM1D, PWDTR1E for outputs
PWM1E and PWM1F, and PWDTR1G for outputs PWM1G and PWM1H.
PWDTR1 cannot be read or written to directly. When a PWCYR1 compare match occurs, data is
transferred from buffer register 1 (PWBFR1) to PWDTR1.
PWDTR1x is initialized to H'EC00 when the counter start bit (CST) in PWCR1 is cleared to 0,
and also upon reset and in standby mode, watch mode, subactive mode, subsleep mode, and
module stop mode.
Bits 15 to 13—Reserved: These bits cannot be read from or written to.
Bit 12—Output Terminal Select (OTS): Bit 12 selects the pin used for PWM output according
to the value in bit 12 in the buffer register that is transferred by a PWCYR1 compare match.
Unselected pins output a low level (or a high level when the corresponding bit in PWPR1 is set to
1).
Register
PWDTR1A
PWDTR1C
PWDTR1E
PWDTR1G
Bits 11 and 10—Reserved: These bits cannot be read from or written to.
Bits 9 to 0—Duty (DT): Bits 9 to 0 set the PWM output duty according to the values in bits 9 to 0
in the buffer register that is transferred by a PWCYR1 compare match. A high level (or a low level
when the corresponding bit in PWPR1 is set to 1) is output from the time PWCNT1 is cleared by a
PWCYR1 compare match until a PWDTR1 compare match occurs. When all the bits are 0, there
620
PWM Duty Registers 1A, 1C, 1E, 1G (PWDTR1A, 1C, 1E, 1G)
15
—
—
1
Bit 12: OTS
0
1
0
1
0
1
0
1
14
—
—
1
13
— OTS —
—
1
12
—
0
Description
PWM1A output selected
PWM1B output selected
PWM1C output selected
PWM1D output selected
PWM1E output selected
PWM1F output selected
PWM1G output selected
PWM1H output selected
11
—
1
10
— DT9 DT8 DT7 DT6 DT5 DT4 DT3 DT2 DT1 DT0
—
1
—
9
0
—
8
0
—
7
0
—
6
0
—
5
0
—
4
0
—
3
0
—
(Initial value)
(Initial value)
(Initial value)
(Initial value)
2
0
—
1
0
—
0
0