14-Bit Pwm Output Control - Renesas 7200 Series User Manual

2.10.4 14-bit PWM output control

How to control the 14-bit PWM output is described below.
Set "0" to bit 0 of PWM output control register 1 (address 00D5
bit is cleared to "0" when reset).
Set the high-order 8 bits of the output data to the DA-H register.
Set the low-order 6 bits of the output data to the DA-L register.
Data is written to the 14-bit PWM circuit by writing data to the DA-L register.
For this reason, even when changing only the high-order 8 bits of the output data, be sure to write the
low-order 6 bits data to the DA-L register again.
Conversely, when changing low-order 6 bits only, it needs to only write data to the DA-L register, and
needs not write the high-order 8-bit data again.
Select the output polarity by bit 2 of PWM output control register 2 (address 00D6
"0," a positive polarity is selected; when "1," a negative polarity is selected.
14-bit PWM is output from the D-A pin by clearing bit 1 of PWM output control register 1 to "0." When
setting to "1," pin D-A functions as a 1-bit general-purpose output port. In this case, it is possible to
specify either HIGH output (= "1") or LOW output(= "0") output by bit 4 of PWM output control register
2.
PWM Output Control Register 1
b7 b6 b5 b4 b3 b2 b1 b0
Fig. 2.10.6 PWM output control register 1 (address 00D5
FUNCTIONAL DESCRIPTION
PWM output control register 1 (PW) [Address 00D5
B Name
DA, PWM count source
0
selection bit (PW0)
1 DA/PN4 output
selection bit (PW1)
P0 /PWM0 output
2
0
selection bit (PW2)
P0 /PWM1 output
3 1
selection bit (PW3)
4 P0 /PWM2 output
2
selection bit (PW4)
5 P0 /PWM3 output
3
selection bit (PW5)
6 P0 /PWM4 output
4
selection bit (PW6)
7 P0 /PWM5 output
5
selection bit (PW7)
7220 Group User's Manual
) to supply the PWM count source (this
16
]
16
Functions
0 : Count source supply
1 : Count source stop
0 : DA output
1 : PN4 output
0: P0 output
0
1: PWM0 output
0: P0 output
1
1: PWM1 output
0: P0 output
2
1: PWM2 output
0: P0 output
3
1: PWM3 output
0: P0 output
4
1: PWM4 output
0: P0 output
5
1: PWM5 output
)
16
2.10 PWM
). When setting to
16
After reset R W
0 R W
0 R W
0 R W
0 R W
0 R W
0 R W
0 R W
0 R W
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