h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 543
h8s-2649
Manufacturer Part Number
h8s-2649
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2649.pdf
(766 pages)
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16.4
16.4.1
PWCYR and PWBFR 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 or written by 8-bit access;
16-bit access must always be used.
16.4.2
PWCR, PWOCR, and PWPR 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 eight bits are read as an undefined value.
Bus
master
Bus
master
Figure 16.6 8-Bit Register Access Operation (Bus Master ↔ PWCR (Upper Eight Bits))
Figure 16.5 16-Bit Register Access Operation (Bus Master ↔ PWCYR (16 Bits))
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
PWCR
Section 16 Motor Control PWM Timer (PWM)
Rev. 2.00 Dec. 05, 2005 Page 505 of 724
PWCYR
REJ09B0200-0200
Module
data bus
Module
data bus
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