HD6413308 Hitachi Semiconductor, HD6413308 Datasheet - Page 182

• Manufacturer Part Number: HD6413308
• Description: Hitachi Single-Chip MicroComputer
• Manufacturer: Hitachi Semiconductor

(4) Contention between Compare-Match A and Compare-Match B: If identical time constants
are written in TCORA and TCORB, causing compare-match A and B to occur simultaneously, any
conflict between the output selections for compare-match A and B is resolved by following the
priority order in Table 7-4.
Table 7-4. Priority of Timer Output
Output selection
Toggle
“1” Output
“0” Output
No change
(5) Incrementation Caused by Changing of Internal Clock Source: When an internal clock
source is changed, the changeover may cause the timer counter to increment. This depends on the
time at which the clock select bits (CKS2 to CKS0) are rewritten, as shown in Table 7-5.
Figure 7-15. Contention between TCOR Write and Compare-Match
Internal address
bus
Internal write
signal
Compare-match
A or B signal
Ø
TCNT
TCORA or
TCORB
Priority
High
Low
Write cycle: CPU writes to TCORA or TCORB
T
1
168
N
N
TCOR address
T
2
TCOR write data
T
3
Figure 7-15
M
N + 1
Inhibited