hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 259
hd66100
Manufacturer Part Number
hd66100
Description
H8/3867 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66100.pdf
(495 pages)
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Bit 4: Channel select (CH2)
Bit 4 selects whether ECH and ECL are used as a single-channel 16-bit event counter or as two
independent 8-bit event counter channels. When CH2 is cleared to 0, ECH and ECL function as a
16-bit event counter which is incremented each time an event clock is input to the AEVL pin as
asynchronous event input. In this case, the overflow signal from ECL is selected as the ECH input
clock. When CH2 is set to 1, ECH and ECL function as independent 8-bit event counters which
are incremented each time an event clock is input to the AEVH or AEVL pin, respectively, as
asynchronous event input.
Bit 4
CH2
0
1
Bit 3: Count-up enable H (CUEH)
Bit 3 enables event clock input to ECH. When 1 is written to this bit, event clock input is enabled
and increments the counter. When 0 is written to this bit, event clock input is disabled and the
ECH value is held. The AEVH pin or the ECL overflow signal can be selected as the event clock
source by bit CH2.
Bit 3
CUEH
0
1
Bit 2: Count-up enable L (CUEL)
Bit 3 enables event clock input to ECL. When 1 is written to this bit, event clock input is enabled
and increments the counter. When 0 is written to this bit, event clock input is disabled and the
ECL value is held.
Bit 2
CUEL
0
1
244
Description
ECH and ECL are used together as a single-channel 16-bit event counter
ECH and ECL are used as two independent 8-bit event counter channels
Description
ECH event clock input is disabled
ECH value is held
ECH event clock input is enabled
Description
ECL event clock input is disabled
ECL value is held
ECL event clock input is enabled
(initial value)
(initial value)
(initial value)
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