GMS81508A Datasheet, PDF (11/91 Pages) Hynix Semiconductor – USERS MANUAL

HYUNDAI MicroElectronics
Classification
I/O Port
No. Symbol
49
R00
:
:
56
R07
41
R10
:
:
48
R17
33
R20
:
:
40
R27
57
R30
:
:
64
R37
28
R40
:
:
21
R47
20
R50
:
:
13
R57
12
R60
:
:
9
R63
8
R64
:
:
5
R65
I/O
Description
R0 Port
I/O ( Can be determined I/O by R0DD )
In MP mode, This port functions as 8-bit data bus for
the CPU. (D0~D7)
R1 Port
I/O ( Can be determined I/O by R1DD )
In MP mode, This functions as 8-bit lower address
output pins. (A0~A7)
R2 Port
I/O ( Can be determined I/O by R2DD )
In MP mode, This functions as 8-bit higher address
output pins.(A8~A15)
R3 Port
I/O ( Can be determined I/O by R3DD )
In MP mode, This port functions as 8-bit control bus
for the CPU.
R4 Port
I/O ( Can be determined I/O by R4DD )
R5 Port
I/O ( Can be determined I/O by R5DD )
R6 Port
I Input Only
I/O R6 Port
( Can be determined I/O by R6DD )
6