Cpu Interface; 8-Bit Registers; Figure 9.2 8Tcnt Access Operation (Cpu Writes To 8Tcnt, Word); Figure 9.3 8Tcnt Access Operation (Cpu Reads 8Tcnt, Word) - Hitachi H8/3062 Hardware Manual

Single-chip microcomputer h8/3062 series; h8/3062b series; h8/3062f-ztat series; h8/3064f-ztat series
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9.3

CPU Interface

9.3.1

8-Bit Registers

8TCNT, TCORA, TCORB, 8TCR, and 8TCSR are 8-bit registers. These registers are connected
to the CPU by an internal 16-bit data bus and can be read and written a word at a time or a byte at
a time.
Figures 9.2 and 9.3 show the operation in word read and write accesses to 8TCNT.
Figures 9.4 to 9.7 show the operation in byte read and write accesses to 8TCNT0 and 8TCNT1.
Internal data bus
H
C
L
P
U

Figure 9.2 8TCNT Access Operation (CPU Writes to 8TCNT, Word)

Internal data bus
H
C
L
P
U

Figure 9.3 8TCNT Access Operation (CPU Reads 8TCNT, Word)

Internal data bus
H
C
L
P
U

Figure 9.4 8TCNT0 Access Operation (CPU Writes to 8TCNT0, Upper Byte)

Bus
interface
Bus
interface
Bus
interface
8TCNT0 8TCNT1
8TCNT0 8TCNT1
8TCNTH0 8TCNTL1
H
Module data bus
L
H
Module data bus
L
H
Module data bus
L
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