参数资料
型号: SAB-C515-LM
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 16 MHz, MICROCONTROLLER, PQFP80
封装: PLASTIC, MQFP-80
文件页数: 37/162页
文件大小: 771K
代理商: SAB-C515-LM
Semiconductor Group
8-3
Fail Safe Mechanisms
C515
8.1.5 WDT Control and Status Flags
The watchdog timer is controlled by two control flags (located in SFR IEN0 and IEN1) and one
status flags (located in SFR IP0).
Special Function Register IEN0 (Address A8H)
Reset Value : 00H
Special Function Register IEN1 (Address B8H)
Reset Value : 00H
Special Function Register IP0 (Address A9H)
Reset Value : X0000000B
The shaded bits are not used for fail save control.
Bit
Function
WDT
Watchdog timer refresh flag.
Set to initiate a refresh of the watchdog timer. Must be set directly
before SWDT is set to prevent an unintentional refresh of the
watchdog timer. WDT is reset by hardware two processor cycles
after it has been set.
SWDT
Watchdog timer start/refresh flag.
Set to activate the watchdog timer. When directly set after setting
WDT, a watchdog timer refresh/reset is performed. Bit SDWT is reset
by hardware two processor cycles after it has been set.
WDTS
Watchdog timer status flag.
Set by hardware when a watchdog Timer reset occured. Can be
cleared and set by software.
EAL
WDT
ET2
ES
A8H
IEN0
AFH
MSB
LSB
ET1
EX1
ET0
EX0
AEH
ADH
ACH
ABH
AAH
A9H
A8H
EXEN2 SWDT
EX6
EX5
B8H
IEN1
BFH
EX4
EX3
EX2
EADC
BEH
BDH
BCH
BBH
BAH
B9H
B8H
WDTS
IP0.5
IP0.4
A9H
IP0
IP0.3
IP0.2
IP0.1
IP0.0
Bit No.
76543210
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