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STR720 Datasheet(PDF) 308 Page - STMicroelectronics

No. de pieza STR720
Descripción Electrónicos  ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES
PDF  401 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STR720 Datasheet(HTML) 308 Page - STMicroelectronics

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STR720 - WATCHDOG TIMER (WDG)
308/401
WDT Key Register (WDTKR)
Address Offset: 18h
Reset value: 0000h
Bit 15:0 = K[15:0]: Key Value.
When Watchdog Mode is enabled, writing in this register the two consecutive values (A55Ah,
5AA5h) the Counter is initialized to TV[15:0] value and the Prescaler value in WTDPR register
take effect. Any number of instructions can be executed between the two writes.
If Watchdog Mode is disabled (WE = 0) a writing in this register has no effect.
The reading value of this register is 0000h.
20.4.1
Register Map
A summary of the WDG registers is given in the following table.
Refer to Table 20 on page 49 for the base address.
15
14
13
12
11
10
9
8
765432
1
0
K15
K14
K13
K12
K11
K10
K9
K8
K7
K6
K5
K4
K3
K2
K1
K0
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
Table 68. Watchdog Timer Peripheral Register Map
Addr.
Offset
Register
Name
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
WDTCR
reserved
EE
SC
WE
4
WDTPR
reserved
PR(7:0)
8
WDTVR
TV(15:0)
C
WDTCNT
CNT(15:0)
10
WDTSR
reserved
EC
14
WDTMR
reserved
MEC
18
WDTKR
K[15:0]
1



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