h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 666

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 17 Motor Control PWM Timer
17.3
17.3.1
PWCYR1 and 2, PWBFR1A, C, E, and G, and PWBFR2A to D are 16-bit registers. These
registers are linked to the bus master by a 16-bit data bus, and can be read or written in 16-bit
units. They cannot be read by 8-bit access; 16-bit access must always be used.
17.3.2
PWCR1/2, PWOCR1/2, and PWPR1/2 are 8-bit registers that can be read and written to in 8-bit
units. These registers are linked to the bus master by a 16-bit data bus, and can be read or written
by 16-bit access; in this case, the lower 8 bits will always be read as H'FF.
Rev. 5.00 Sep 22, 2005 page 640 of 1136
REJ09B0257-0500
Bus
master
Bus
master
Figure 17.9 8-Bit Register Access Operation (Bus Master ↔
Figure 17.8 16-Bit Register Access Operation (Bus Master ↔
Bus Master Interface
16-Bit Data Registers
8-Bit Data Registers
Internal data bus
Internal data bus
H
H
L
L
interface
interface
Bus
Bus
PWCR1
PWCYR1
↔ ↔
↔ PWCR1 (Upper 8 Bits))
↔ ↔
↔ PWCYR1 (16 Bits))
Module
data bus
Module
data bus