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AT89C55WD Datasheet(PDF) 8 Page - SYC Electronica

Part # AT89C55WD
Description  8-bit Microcontroller with 20K Bytes Flash
PDF  34 Pages
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Manufacturer  SYC [SYC Electronica]
Direct Link  https://www.sycelectronica.com.ar/index.php
Logo SYC - SYC Electronica

AT89C55WD Datasheet(HTML) 8 Page - SYC Electronica

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8
1921D–MICRO–6/08
AT89C55WD
Table 5-3.
AUXR: Auxiliary Register
AUXR
Address = 8EH
Reset Value = XXX00XX0B
Not Bit Addressable
–
–
–
WDIDLE
DISRTO
–
–
DISALE
Bit
765
4
3
2
1
0
–
Reserved for future expansion
DISALE
Disable/Enable ALE
DISALE
Operating Mode
0
ALE is emitted at a constant rate of 1/6 the oscillator frequency
1
ALE is active only during a MOVX or MOVC instruction
DISRTO
Disable/Enable Reset out
DISRTO
Operating Mode
0
Reset pin is driven High after WDT times out
1
Reset pin is input only
WDIDLE
Disable/Enable WDT in IDLE mode
WDIDLE
Operating Mode
0
WDT continues to count in IDLE mode
1
WDT halts counting in IDLE mode
Table 5-4.
AUXR1: Auxiliary Register 1
AUXR1
Address = A2H
Reset Value = XXXXXXX0B
Not Bit Addressable
–––
–
–
–
–
DPS
Bit
765
4
3
2
1
0
–
Reserved for future expansion
DPS
Data Pointer Register Select
DPS
0
Selects DPTR Registers DP0L, DP0H
1
Selects DPTR Registers DP1L, DP1H



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