Rev. 1.0, 09/01, page 541 of 904
TCNT value
H'09FB
H'0000
TGRC
Time
H'0532
TIOCA
TGRA
H'0F07
H'0532
H'0F07
H'0532
H'0F07
H'09FB
Figure 11.16 Example of Buffer Operation (2)
11.4.4
Cascaded Operation
In cascaded operation, two 16-bit counters for different channels are used together as a 32-bit
counter.
This function works by counting the channel 1 (channel 4) counter clock at overflow/underflow of
TCNT_2 (TCNT_5) as set in bits TPSC2 to TPSC0 in TCR.
Underflow occurs only when the lower 16-bit TCNT is in phase-counting mode.
Table 11.29 shows the register combinations used in cascaded operation.
Note: When phase counting mode is set for channel 1 or 4, the counter clock setting is invalid
and the counter operates independently in phase counting mode.
Table 11.29 Cascaded Combinations
Combination
Upper 16 Bits
Lower 16 Bits
Channels 1 and 2
TCNT_1
TCNT_2
Channels 4 and 5
TCNT_4
TCNT_5
Содержание H8S/2376 F-ZTAT
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