Bit 4
CH2
Description
0
ECH and ECL are used together as a single-channel 16-bit event counter
(initial value)
1
ECH and ECL are used as two independent 8-bit event counter channels
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
Description
0
ECH event clock input is disabled
(initial value)
ECH value is held
1
ECH event clock input is enabled
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
Description
0
ECL event clock input is disabled
(initial value)
ECL value is held
1
ECL event clock input is enabled
Bit 1: Counter reset control H (CRCH)
Bit 1 controls resetting of ECH. When this bit is cleared to 0, ECH is reset. When 1 is written to
this bit, the counter reset is cleared and the ECH count-up function is enabled.
Bit 1
CRCH
Description
0
ECH is reset
(initial value)
1
ECH reset is cleared and count-up function is enabled
243