h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 322
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h8s-2172
Manufacturer Part Number
h8s-2172
Description
Renesas 16-bit Single-chip Microcomputer H8s Family H8s-2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2172.pdf
(570 pages)
- Current page: 322 of 570
- Download datasheet (5Mb)
10.5.2
If a timer counter clock pulse is generated during the T2 state of a TCNT write cycle, the write
takes priority and the timer counter is not incremented. Figure 10.7 shows this operation.
10.5.3
If bits CKS2 to CKS0 in TCSR are written to while the WDT is operating, errors could occur in
the incrementation. Software must stop the watchdog timer (by clearing the TME bit to 0) before
changing the values of bits CKS2 to CKS0.
10.5.4
If the mode is switched from watchdog timer to interval timer, while the WDT is operating, errors
could occur in the incrementation. Software must stop the watchdog timer (by clearing the TME
bit to 0) before switching the mode.
Rev. 2.00, 03/04, page 290 of 534
Conflict between Timer Counter (TCNT) Write and Increment
Changing Values of CKS2 to CKS0 Bits
Switching between Watchdog Timer Mode and Interval Timer Mode
φ
Address
Internal write signal
TCNT input clock
TCNT
Figure 10.7 Conflict between TCNT Write and Increment
N
TCNT write cycle
T 1
T 2
Counter write data
M
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