GMS34004 Datasheet, PDF (45/105 Pages) Hynix Semiconductor – 4-BIT SINGLE CHIP MICROCOMPUTERS

Chapter 3. Instruction
(39) RO
Naming :
Status :
Format :
Function :
<Purpose>
<Comment>
(40) WDTR
Naming :
Status :
Format :
Function :
<Purpose>
Reset Output Register Latch
Set
¥°
D(Y) ¡ç 0
REMOUT ¡ç 0
D0~D9 ¡ç 0
R(Y) ¡ç 0
R ¡ç 0
D0~D9, R ¡ç 0
0 ¡Â Y ¡Â 7
Y=8
Y=9
Ah ¡Â Y ¡Â Dh
Y = Eh
Y = Fh
A single D output line is set to logic 0, if data of Y-register is
between 0 to 9.
REMOUT port is set to logic 0, if data of Y-register is 9.
All D output line is set to logic 0, if data of Y-register is 9.
When Y is between Ah and Dh, one of R output lines is set at
logic 0.
When Y is Eh, the output of R is set at logic 0
When Y is Fh, the output D0~D9 and R are set at logic 1.
Data of Y-register is between 0 to 7, selects appropriate D
output.
Data of Y-register is 8, selects REMOUT port.
Data of Y-register is 9, selects D port.
Data in Y-register, when between Ah and Dh, selects an
appropriate R output (R0~R3).
Data in Y-register, when it is Eh, selects all of R0~R3.
Data in Y-register, when it is Fh, selects all of D0~D9 and
R0~R3.
Watch Dog Timer Reset
Set
¥°
Reset Watch Dog Timer (WDT)
Normally, you should reset this counter before overflowed
counter for dc watch dog timer. this instruction controls this
reset signal.
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