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H838532H bảng dữ liệu(PDF) 290 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
Logo RENESAS - Renesas Technology Corp

H838532H bảng dữ liệu(HTML) 290 Page - Renesas Technology Corp

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Section 9 Timers
Rev. 1.00 May 30, 2008 Page 270 of 484
REJ09B0436-0100
Bit 2: Watchdog timer module standby mode control (WDCKSTP)
Bit 2 controls setting and clearing of module standby mode for the watchdog timer.
WDCKSTP
Description
0
Watchdog timer is set to module standby mode
1
Watchdog timer module standby mode is cleared
(initial value)
Note:
WDCKSTP is valid when the WDON bit is cleared to 0 in timer control/status register W
(TCSRW). If WDCKSTP is set to 0 while WDON is set to 1 (during watchdog timer
operation), 0 will be set in WDCKSTP but the watchdog timer will continue its watchdog
function and will not enter module standby mode. When the watchdog function ends and
WDON is cleared to 0 by software, the WDCKSTP setting will become valid and the
watchdog timer will enter module standby mode.
(4) Port Mode Register 3 (PMR3)
Bit
Initial value
Read/Write
7
AEVL
0
R/W
6
AEVH
0
R/W
5
WDCKS
0
R/W
4
NCS
0
R/W
3
IRQ0
0
R/W
0
PWM
0
R/W
2
—
1
—
1
UD
0
R/W
PMR3 is an 8-bit read/write register, mainly controlling the selection of pin functions for port 3
pins. Only the bit relating to the watchdog timer is described here. For details of the other bits, see
section 8, I/O Ports.
Bit 5: Watchdog timer source clock select (WDCKS)
WDCKS
Description
0
φ/8192 selected
(initial value)
1
φw/32 selected



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