8-Bit Accessible Registers - Hitachi H8/3032 Series Hardware Manual

Downloaded from Elcodis.com electronic components distributor
On-chip data bus
H
CPU L Bus interface
Figure 8-11 Access to Timer Counter (CPU Reads TCNT, Lower Byte)

8.3.2 8-Bit Accessible Registers

The registers other than the timer counters, general registers, and buffer registers are 8-bit
registers. These registers are linked to the CPU by an internal 8-bit data bus.
Figures 8-12 and 8-13 show examples of byte read and write access to a TCR.
If a word-size data transfer instruction is executed, two byte transfers are performed.
On-chip data bus
H
CPU L Bus interface
Figure 8-12 TCR Access (CPU Writes to TCR)
TCNTH TCNTL
TCR
207
H
Module
L
data bus
H
Module
L
data bus