HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 250

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

8. 16-Bit Timer
8.3
8.3.1
The timer counters (16TCNTs), general registers A and B (GRAs and GRBs) are 16-bit registers,
and are linked to the CPU by an internal 16-bit data bus. These registers can be written or read a
word at a time, or a byte at a time.
Figures 8.4 and 8.5 show examples of word read/write access to a timer counter (16TCNT).
Figures 8.6 to 8.9 show examples of byte read/write access to 16TCNTH and 16TCNTL.
Rev.4.00 Aug. 20, 2007 Page 206 of 638
REJ09B0395-0400
CPU
CPU
On-chip data bus
On-chip data bus
CPU Interface
16-Bit Accessible Registers
H
L
H
L
Figure 8.5 Access to Timer Counter (CPU Reads 16TCNT, Word)
Figure 8.4 16TCNT Access Operation [CPU → 16TCNT (Word)]
Bus interface
Bus interface
16TCNTH
16TCNTH
16TCNTL
16TCNTL
H
L
H
L
Module
data bus
Module
data bus