Apc5890, Aplus integrated circuits inc, Address arrangement – Rainbow Electronics APC5890 User Manual
Page 4
APLUS INTEGRATED CIRCUITS INC.
APC5890
www.aplusinc.com.tw
TEL : 886-2-2782-9266
4
4. ADDRESS ARRANGEMENT :
1) RAM :
0000-07FF
:
I
NTERNAL
RAM,
1K
X
16.
0000-1FFF
:
E
XTERNAL
N
ON
-B
ANK
RAM(E
XTRAMCS
=1),
4K
X
16.
2)
ROM
:
z
4000-7FFF : data area for bank select, 8Kx16 each, max. to 64Mbit
z
BANK ROM or BANK RAM.
z
C000-FFFF : for System program or User Program, 8Kx16.
z
FFF0, FFF1 : Coprocessor OK IRQ vector.
z
FFF2, FFF3 : ADC IRQ vector.
z
FFF4, FFF5 : not use
z
FFF6, FFF7 : Timer IRQ(Fix_Timer IRQ or Timer_A IRQ) vector.
z
FFF8, FFF9 : PA[7:0] IRQ vector.
z
FFFA, FFFB : Timer_B NMI vector.
z
FFFC, FFFD : RES vector.
z
FFFE, FFFF : EXT IRQ vector.
z
Priority is arranged as RES, NMI, OK_INT, ADC_INT,
TIMER_INT,PA_INT, and EXT_IRQ.
MEMORY MAPPING ( INTERNAL ROM )