hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 261

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

3. Event counter L (ECL)
ECL is an 8-bit read-only up-counter that operates either as an independent 8-bit event counter or
as the lower 8-bit up-counter of a 16-bit event counter configured in combination with ECH. The
event clock from the external asynchronous event AEVL pin is used as the input clock source.
ECL can be cleared to H'00 by software, and is also initialized to H'00 upon reset.
4. Clock stop register 2 (CKSTPR2)
CKSTPR2 is an 8-bit read/write register that performs module standby mode control for peripheral
modules. Only the bit relating to the asynchronous event counter is described here. For details of
the other bits, see the sections on the relevant modules.
Bit 3: Asynchronous event counter module standby mode control (AECKSTP)
Bit 3 controls setting and clearing of module standby mode for the asynchronous event counter.
AECKSTP
0
1
246
Bit
Initial Value
Read/Write
Bit
Initial value
Read/Write
Description
Asynchronous event counter is set to module standby mode
Asynchronous event counter module standby mode is cleared
—
—
ECL7
7
1
0
7
R
ECL6
—
—
6
1
0
R
6
ECL5
—
—
5
1
5
0
R
ECL4
—
—
4
1
R
4
0
AECKSTP
R/W
ECL3
3
1
0
R
3
WDCKSTP PWCKSTP LDCKSTP
R/W
ECL2
2
1
R
2
0
R/W
ECL1
1
1
0
R
1
(initial value)
R/W
ECL0
0
1
R
0
0