12-Bit Pwm Data Registers (Cpwdr, Dpwdr) - Renesas Hitachi H8S/2194 Series Hardware Manual

20.2.2

12-Bit PWM Data Registers (CPWDR, DPWDR)

(1) CPWDR
Bit :
15 14
— —
Initial value :
1 1
R/W :
— —
(2) DPWDR
Bit :
15 14
— —
Initial value :
1 1
R/W :
— —
The 12-bit PWM data registers (CPWDR and DPWDR) are 12-bit readable/writable registers
in which the data to be converted to PWM output is written.
The data in these registers is converted to PWM output only when bit SF/DF of the
corresponding control register is set to 1. The error data from the digital filter circuit is
written in the data register, and then modulated by PWM. At this time, the error data from
the digital filter circuit can be monitored by reading the data register.
These registers can be accessed by word only, and cannot be accessed by byte. Byte access
gives unassured results.
CPWDR and DPWDR are initialized to H'F000 by a reset, or in sleep mode, standby mode,
watch mode, subactive mode, subsleep mode, or module stop mode of the servo circuit.
13 12 11 10
— —
CPWDR11 CPWDR10 CPWDR9
1 1 0 0
— —
R/W R/W
13 12 11 10
— —
DPWDR11 DPWDR10 DPWDR9
1 1 0 0
— —
R/W R/W
9 8 7 6
CPWDR8 CPWDR7 CPWDR6
0 0 0 0
R/W R/W R/W R/W
9 8 7 6
DPWDR8 DPWDR7 DPWDR6 DPWDR5
0 0 0 0
R/W R/W R/W R/W
Rev. 2.0, 11/00, page 419 of 1037
5 4 3 2
CPWDR5 CPWDR4 CPWDR3 CPWDR2
0 0 0 0
R/W R/W R/W R/W
5 4 3 2
DPWDR4 DPWDR3 DPWDR2
0 0 0 0
R/W R/W R/W R/W
1 0
CPWDR1 CPWDR0
0 0
R/W R/W
1 0
DPWDR1 DPWDR0
0 0
R/W R/W