Datasheet

Section 16 14-Bit PWM
Rev. 1.50 Sep. 18, 2007 Page 366 of 584
REJ09B0240-0150
16.3 Register Descriptions
The 14-bit PWM has the following registers.
• PWM control register (PWCR)
• PWM data register U (PWDRU)
• PWM data register L (PWDRL)
16.3.1 PWM Control Register (PWCR)
PWCR selects the conversion period.
Bit Bit Name
Initial
Value R/W Description
7
6
5
4
3
2
1







1
1
1
1
1
1
1







Reserved
These bits are always read as 1, and cannot be
modified.
0 PWCR0 0 R/W Clock Select
0: The input clock is φ/2 (tφ = 2/φ)
 The conversion period is 16384/φ, with a
minimum modulation width of 1/φ
1: The input clock is φ/4 (tφ = 4/φ)
 The conversion period is 32768/φ, with a
minimum modulation width of 2/φ
[Legend] tφ: Period of PWM clock input