Realistic PRO-2004 - Microprocessor (IC-503) Details; Microprocessor Pin Allocation

MICROPROCESSOR (lC·503) PIN ALLOCATION
I (A I)
7(A7l
S(ASl
3(A3l
2{ A2l
4(A4l
6(A6l
I/O 3
address 4>(Adl)
Memory I/O 2
Memory I/O I
P26
P27
P3T ISRDY
RF filter switch
P3~/TXD
RF filter switch
PI3
RF filter switch
P34/RXD
PI4
P33/CNTR
PI~
P321INT2
P31
P3cP
USA/etc
Cellu lar switch
INTI
Reset
CNVSS
Input
RESET
XIN
X
OUT
cP
Low battery
LCD Busy
v SS
Memor
veo fi Iter 2 Out ut
veo filter lOut ut
Mute
Memory address
Memory address 9 (A9)
Memor address S(AS)
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