Rainbow Electronics APC5890 - Manual (Page 5)

APLUS INTEGRATED CIRCUITS INC.
APC5890
www.aplusinc.com.tw TEL : 886-2-2782-9266 5
MEMORY MAPPING ( EXTTERNAL ROM )
3) Others :
z 3FE0 System Flag. Read only. :
3FE0 0 1
BIT - 0
NO USE
BIT - 1
NO USE
BIT - 2 ADC
NO ERROR
. ADC
ERROR
.
T
IMER
_A INT
FLAG
BIT - 3
T
IMER
IRQ T
IMER
_A INT
FLAG
1 1 ……….. T
IMER
_A INT
1 0 ………. F
IX
_T
IMER
INT
1 X ……….
NO
T
IMER
INT
BIT - 4
NO USE
BIT - 5 OK
FLAG
(C
OPROCESSOR
OK)
BIT - 6 C
OPROCESSOR CARRY
.
BIT - 7 T
ONE
0
OR TONE
1
ENABLE
.