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H8/3028F 数据表(PDF) 399 Page - Renesas Technology Corp

部件名 H8/3028F
功能描述  Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
PDF  923 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

H8/3028F 数据表(HTML) 399 Page - Renesas Technology Corp

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Rev. 2.00, 09/03, page 369 of 890
Note on Waveform Period Setting: When a counter is cleared by compare match, the counter is
cleared in the last state at which the 16TCNT value matches the general register value, at the time
when this value would normally be updated to the next count. The actual counter frequency is
therefore given by the following formula:
f =
φ
(N + 1)
(f: counter frequency.
φ: system clock frequency. N: value set in general register.)
Note on Writes in Synchronized Operation: When channels are synchronized, if a 16TCNT
value is modified by byte write access, all 16 bits of all synchronized counters assume the same
value as the counter that was addressed.
(Example) When channels 1 and 2 are synchronized
• Byte write to channel 1 or byte write to channel 2
16TCNT1
16TCNT2
W
Y
X
Z
16TCNT1
16TCNT2
A
A
X
X
16TCNT1
16TCNT2
Y
Y
A
A
16TCNT1
16TCNT2
W
Y
X
Z
16TCNT1
16TCNT2
A
A
B
B
• Word write to channel 1 or word write to channel 2
Upper byte Lower byte
Upper byte Lower byte
Upper byte Lower byte
Upper byte Lower byte
Upper byte Lower byte
Write A to upper byte
of channel 1
Write A to lower byte
of channel 2
Write AB word to
channel 1 or 2



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