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CybraTech (2000) Ltd.
SOC-3000/i Scale-On-Chip
ASIC
Technical Specification
Revision B
Page 69
July, 2002
I/O OPERATION
I/O operation is determined by the configuration registers (CFR) programming. The I/O
ports are composed of two groups:
•
Byte-Oriented Output Ports –
Data written to the port is byte oriented (writing FFH to the port will set it to HIGH, and
writing 00H to the port will set it to LOW).
•
Bit-Oriented Input/Output (I/O) Ports –
Data written to the port is byte oriented (FFH–to set the port, 00H–to reset the port).
Data read from the port is bit-oriented (only the port allocated bit is set/reset).
Table 44, the I/O ports groups, addresses and corresponding PLCC-84 pins are described in
Table 37 and Table 38.
TABLE 37: BIT-ORIENTED I/O PORTS ADDRESSES, PIN AND BIT ASSIGNMENT
PLCC-84 PIN
I/O PORT NAME
PORT
ADDRESS
BIT
ASSIGNMENT
(LSB)
5
I.O 15.7
F22A
0 0 0 0 0 0 0 x
4
I.O 15.6
F22B
0 0 0 0 0 0 x 0
3
I.O 15.5
F22C
0 0 0 0 0 x 0 0
2
I.O 15.4
F22D
0 0 0 0 x 0 0 0
1
I.O 15.3
F22E
0 0 0 x 0 0 0 0
84
I.O 15.2
F22F
0 0 x 0 0 0 0 0
83
I.O 15.1
F230
0 x 0 0 0 0 0 0
82
I.O 15.0
F231
x 0 0 0 0 0 0 0
81
I.O 14.7
F232
0 0 0 0 0 0 0 x
80
I.O 14.6
F233
0 0 0 0 0 0 x 0
79
I.O 14.5
F234
0 0 0 0 0 x 0 0
78
I.O 14.4
F235
0 0 0 0 x 0 0 0
77
I.O 14.3
F236
0 0 0 x 0 0 0 0
76
I.O 14.2
F237
0 0 x 0 0 0 0 0
75
I.O 14.1
F238
0 x 0 0 0 0 0 0
74
I.O 14.0
F239
x 0 0 0 0 0 0 0
TABLE 38: BYTE-ORIENTED OUTPUT PORTS ADDRESSES AND PIN ASSIGNMENT
PLCC-84 PIN
I/O FUNCTION
PORT ADDRESS
61
OUT 13.3
F205
60
OUT 13.2
F206
59
OUT 13.1
F207
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