hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 260

• Manufacturer Part Number: hd66100
• Description: H8/3867 Series
• Manufacturer: Renesas Electronics Corporation.

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
0
1
Bit 0: Counter reset control L (CRCL)
Bit 0 controls resetting of ECL. When this bit is cleared to 0, ECL is reset. When 1 is written to
this bit, the counter reset is cleared and the ECL count-up function is enabled.
Bit 0
CRCL
0
1
2. Event counter H (ECH)
ECH is an 8-bit read-only up-counter that operates either as an independent 8-bit event counter or
as the upper 8-bit up-counter of a 16-bit event counter configured in combination with ECL.
Either the external asynchronous event AEVH pin or the overflow signal from lower 8-bit counter
ECL can be selected as the input clock source by bit CH2. ECH can be cleared to H'00 by
software, and is also initialized to H'00 upon reset.
Bit
Initial Value
Read/Write
Description
ECH is reset
ECH reset is cleared and count-up function is enabled
Description
ECL is reset
ECL reset is cleared and count-up function is enabled
ECH7
0
R
7
ECH6
0
R
6
ECH5
R
5
0
ECH4
R
4
0
ECH3
R
3
0
ECH2
R
2
0
ECH1
0
1
R
(initial value)
(initial value)
ECH0
R
0
0
245