8-Bit Accessible Registers - Hitachi SH7032 Hardware Manual

10.3.2

8-Bit Accessible Registers

All registers other than the TCNT register, 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.
Internal data bus
CPU
Internal data bus
CPU
Bus
interface
Figure 10.12 TCR Access (CPU to TCR)
Bus
interface
Figure 10.13 TCR Access (TCR to CPU )
Module
data bus
TCR
Module
data bus
TCR
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