HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 322

• Manufacturer Part Number: HD6417034B
• Description: 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 10 16-Bit Integrated Timer Pulse Unit (ITU)
10.6.3
If an increment pulse occurs in the T2 state or T3 state of a TCNT byte write cycle, counter
writing takes priority and the byte data on the side that was previously written is not incremented.
The TCNT byte data that was not written is also not incremented and retains its previous value.
The timing is shown in figure 10.60 (which shows an increment during state T2 of a byte write
cycle to TCNTH).
Rev. 7.00 Jan 31, 2006 page 296 of 658
REJ09B0272-0700
Contention between TCNT Byte Write and Increment
Figure 10.60 Contention between TCNT Byte Write and Increment
Internal write signal
TCNT input clock
Address
TCNTH
TCNTL
CK
TCNTH byte write cycle by CPU
T1
X
TCNTH address
N
TCNT write data
T2
X + 1
T3
X
M