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EM6617 Datasheet(PDF) 11 Page - EM Microelectronic - MARIN SA

Part No. EM6617
Description  Ultra Low Power Microcontroller with ADC AND EEPROM
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Maker  EMMICRO [EM Microelectronic - MARIN SA]
Homepage  http://www.emmicroelectronic.com
Logo EMMICRO - EM Microelectronic - MARIN SA

EM6617 Datasheet(HTML) 11 Page - EM Microelectronic - MARIN SA

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EM6617
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© 2005, EM Microelectronic-Marin SA
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Table 5.4.1 Watchdog Timer Register RegSysCntl2
Bit
Name
Reset
R/W
Description
3
WDReset
0
R/W
Reset the Watchdog
1 -> Resets the Logic Watchdog
0 -> No action
The Read value is always '0'
2
SleepEn
0
R/W
See Operating modes (sleep)
1
WDVal1
0
R
Watchdog timer data Ck[1] divided by 4
0
WDVal0
0
R
Watchdog timer data Ck[1] divided by 2
Table 5.4.2 Watchdog Control Register RegSysCntl3
Bit
Name
Reset
R/W
Description
3
Vref1/2Sel
0
R/W
Reference selection for the ADC
2
--
0
R/W
always reads 0
1
NoOscWD
0
R/W
No oscillation supervisor
0
NoLogicWD
0
R/W
No logic watchdog
5.5 CPU State after Reset
Reset initializes the CPU as shown in Table 5.5.1 below.
Table 5.5.1 Initial CPU Value after Reset.
Name
Bits
Symbol
Initial Value
Program counter 0
12
PC0
hex 000 (as a result of Jump 0)
Program counter 1
12
PC1
Undefined
Program counter 2
12
PC2
Undefined
Stack pointer
2
SP
PSP[0] selected
Index register
7
IX
Undefined
Carry flag
1
CY
Undefined
Zero flag
1
Z
Undefined
Halt
1
HALT
0
Instruction register
16
IR
Jump 0
Periphery registers
4
Reg.
See peripheral memory map


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