HD64F7050 RENESAS [Renesas Technology Corp], HD64F7050 Datasheet - Page 334

• Manufacturer Part Number: HD64F7050
• Description: 32-Bit RISC Microcomputer SuperH RISC engine Family/
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 10 Advanced Timer Unit (ATU)
10.5.2
Free-running counters 1 to 9 (TCNT1 to TCNT9), the general registers (GR), down-counters
(DCNT), offset base register (OSBR), cycle registers (CYLR), buffer registers (BFR), duty
registers (DTR), and timer start register (TSTR) are 16-bit registers. These registers are connected
to the CPU via an internal 16-bit data bus, and can be read or written (read only, in the case of
OSBR) a word at a time.
Figure 10.39 shows the operation when performing a word read or write access to TCNT1.
Rev. 5.00 Jan 06, 2006 page 314 of 818
REJ09B0273-0500
CPU
CPU
CPU
Internal data bus
H
Internal data bus
L
Registers Requiring 16-Bit Access
Internal data bus
Figure 10.39 TCNT1 Read/Write Operation
interface
interface
Bus
Bus
Figure 10.38 Write to TCNT0
interface
Module data
bus
L
H
Bus
1st write operation
2nd write operation
Internal buffer
Internal buffer
register
register
Module data bus
Module data bus
H
Module
data bus
TCNT1
TCNT0H
TCNT0H
TCNT0L
TCNT0L