HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 322

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

9. 8-Bit Timers
9.7.7
Contention between 8TCNT Byte Write and Increment in 16-Bit Count Mode
(Cascaded Connection)
If an increment pulse occurs in the T
or T
state of an 8TCNT byte write cycle in 16-bit count
2
3
mode, the counter write takes priority and the byte data for which the write was performed is not
incremented. The byte data for which a write was not performed is incremented. Figure 9.24
shows the timing when an increment pulse occurs in the T
state of a byte write to 8TCNT (upper
2
byte). If an increment pulse occurs in the T
state, on the other hand, the increment takes priority.
2
8TCNT (upper byte) byte write cycle
T
T
T
1
2
3
φ
Address bus
8TCNTH address
Internal write signal
8TCNT input clock
N + 1
8TCNT (upper byte)
N
8TCNT write data
8TCNT (lower byte)
X
X + 1
Figure 9.24 Contention between 8TCNT Byte Write and Increment in 16-Bit Count Mode
Rev.4.00 Aug. 20, 2007 Page 278 of 638
REJ09B0395-0400