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SH7021 Datasheet(PDF) 259 Page - Renesas Technology Corp

Part # SH7021
Description  SuperH??RISC engine
PDF  509 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7021 Datasheet(HTML) 259 Page - Renesas Technology Corp

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TCNTH
TCNTL
H
L
Bus
interface
H
L
CPU
Internal data bus
Module
data bus
Figure 10.9 Accessing TCNT (CPU–TCNT (lower byte))
TCNTH
TCNTL
H
L
Bus
interface
H
L
CPU
Internal data bus
Module
data bus
Figure 10.10 Accessing TCNT (TCNT–CPU (upper byte))
TCNTH
TCNTL
H
L
Bus
interface
H
L
CPU
Internal data bus
Module
data bus
Figure 10.11 Accessing TCNT (TCNT–CPU (lower byte))
10.3.2
8-Bit Accessible Registers
All registers other than the TCNT, general registers, and buffer registers are 8-bit registers. These
are connected to the CPU by an 8-bit data bus. Figures 10.12 and 10.13 illustrate reading and
writing in byte units with the timer control register (TCR). These registers must be accessed by
byte access.



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