r8a66170dd Renesas Electronics Corporation., r8a66170dd Datasheet - Page 5

• Manufacturer Part Number: r8a66170dd
• Description: 4-ch 16-bit Pwm Generator
• Manufacturer: Renesas Electronics Corporation.

R8A66170DD/SP
REJ03F0272-0100 Rev.1.00 Apr.01.2008
Page 5 of 20
Fig.2 Data-setting sequence for registers
Fig.3 Flow chart in Mode 0 or 1 (for one channel)
(Command 2)
D3
1
1
1
1
1
1
0
0
First byte
D2
X
X
1
1
1
1
0
0
C/D=1
C/D=0
C/D=1
C/D=0
C/D=1
C/D=0
C/D=0
C/D=1
D1
1
0
1
0
1
0
1
0
Upper byte of
PWM H register
Lower byte of
PWM H register
Upper byte of
PWM H register
Lower byte of
PWM H register
Upper byte of
PWM L register
Lower byte of
PWM L register
Upper byte of
prescaler register
Lower byte of
prescaler register
No
Mode setting (command 1)
The second byte
PWM counter setting
Prescaler setting
Prescaler value
Prescaler value
PWM counter
PWM counter
Output enable
(command 2)
(command 2)
(command 3)
(upper byte)
(upper byte)
upper byte
upper byte
lower byte
lower byte
Setting
completed?
Reset
Start
1
Yes
Lower byte of
PWM H register
Lower byte of
PWM H register
Upper byte of
PWM L register
Lower byte of
PWM L register
Lower byte of
prescaler register
The third byte
D7, D4, D3 = 0
D1 = 1
D7, D4 = 0
D3, D2, D1 = 1
D7 = 1
D7 = 0
D4 = 1
-
-
-
Upper byte of
PWM L register
Lower byte of
PWM L register
The fourth byte
C/D=0
C/D=1
C/D=0
-
-
-
-
-
-
C/D=1
Yes
Yes
Prescaler or PWM counter
Upper byte of prescaler or
Lower byte of prescaler or
Lower byte of
PWM L register
The fifth byte
setting change
Output disable
PWM counter
PWM counter
(command 2)
(command 3)
Change
setting?
Change
setting?
Change
mode?
End
1
-
-
-
-
-
-
-
Yes
No
No
No
In Mode 0 or 1
In Mode 2
D7, D4 = 0
D3 = 0 or 1
D2 = 1
D1 = 0 or 1
D7=0
D4=1
Remark