Datasheet

Table Of Contents
Section 19 14-Bit PWM
Rev. 2.00 Jul. 04, 2007 Page 435 of 692
REJ09B0309-0200
19.3.1 PWM Control Register (PWCR)
PWCR selects the input clocks and selects whether the standard PWM or pulse-division type
PWM is used.
Bit Bit Name
Initial
Value
R/W Description
7 to 3 All 1 Reserved
These bits are always read as 1 and cannot be
modified.
2 PWCRm2 0 W PWM Output Waveform Select
Selects whether the standard PWM waveform or pulse-
division type PWM waveform is output.
0: Pulse-division type PWM waveform is output
1: Standard PWM waveform is output
1
0
PWCRm1
PWCRm0
0
0
W
W
Clock Select 1 and 0
Select the clock supplied to the 14-bit PWM. These bits
are write-only bits and always read as 1.
00: The input clock is φ/2
A conversion period is 16,384/φ, with a
minimum modulation width of 1/φ
01: The input clock is φ/4
A conversion period is 32,768/φ, with a
minimum modulation width of 2/φ
10: The input clock is φ/8
A conversion period is 65,536/φ, with a
minimum modulation width of 4/φ
11: The input clock is φ/16
A conversion period is 131,072/φ, with a
minimum modulation width of 8/φ
Note: m = 4 to 1