h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 781

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

19.3
19.3.1
PWCYR1/2, PWBFR1A/C/E/G, and PWBFR2A/B/C/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.
19.3.2
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.
Bus
master
Bus
master
Figure 19-9 8-Bit Register Access Operation (Bus Master
Figure 19-8 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
Rev. 6.00 Feb 22, 2005 page 721 of 1484
Section 19 Motor Control PWM Timer
PWCYR1
PWCR1 (Upper 8 Bits))
PWCYR1 (16 Bits))
REJ09B0103-0600
Module
data bus
Module
data bus