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H838532H bảng dữ liệu(PDF) 299 Page - Renesas Technology Corp

tên linh kiện H838532H
Giải thích chi tiết về linh kiện  16-Bit Single-Chip Microcomputer H8 Family / H8/300H Super Low Power Series
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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Section 9 Timers
Rev. 1.00 May 30, 2008 Page 279 of 484
REJ09B0436-0100
(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.
ECL7
ECL2
ECL1
ECL0
ECL6
ECL5
ECL4
ECL3
76543210
0
000
00
00
R
RRR
RRR
R
Bit
Initial Value
Read/Write
(4) Clock Stop Register 2 (CKSTPR2)
—
WDCKSTP PWCKSTP LDCKSTP
—
—
—
AECKSTP
7
6
543210
1
1111111
—
R/W
R/W
R/W
———
R/W
Bit
Initial value
Read/Write
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
Description
0
Asynchronous event counter is set to module standby mode
1
Asynchronous event counter module standby mode is cleared
(initial value)



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