dp83251 National Semiconductor Corporation, dp83251 Datasheet - Page 72

• Manufacturer Part Number: dp83251
• Description: Player Device Fddi Physical Layer Controller
• Manufacturer: National Semiconductor Corporation

6 0 Pin Descriptions
PHY PORT INTERFACE (Continued)
Symbol
BIP
BIC
BID7
BID6
BID5
BID4
BID3
BID2
BID1
BID0
BRP
BRC
BRD7
BRD6
BRD5
BRD4
BRD3
BRD2
BRD1
BRD0
Pin No
109
107
105
103
100
110
108
106
104
101
97
94
92
90
88
98
95
93
91
89
I O
O
O
O
O
I
I
I
I
(Continued)
PHY Port B Indicate Parity A TTL output signal representing odd parity for the 10-bit
wide Port B Indicate signals (BIP BIC and BID
PHY Port B Indicate Control A TTL output signal indicating that the two 4-bit symbols
(BID
PHY Port B Indicate Data TTL output signals representing the first 4-bit data control
symbol
BID7 is the most significant bit and BID4 is the least significant bit of the first symbol
PHY Port B Indicate Data TTL output signals representing the second 4-bit data
control symbol
BID3 is the most significant bit and BID0 is the least significant bit of the second symbol
PHY Port B Request Parity A TTL input signal representing odd parity for the 10-bit
wide Port B Request signals (BRP BRC and BRD
PHY Port B Request Control A TTL input signal indicating that the two 4-bit symbols
(BRD
(BRC
PHY Port B Request Data TTL input signals representing the first 4-bit data control
symbol
BRD7 is the most significant bit and BRD4 is the least significant bit of the first symbol
PHY Port B Request Data TTL input signals representing the second 4-bit data control
symbol
BRD3 is the most significant bit and BRD0 is the least significant bit of the second
symbol
e
0)
k
k
e
7 4
7 4
0)
l
l
and BID
) and BRD
k
3 0
k
72
3 0
l
) are either control symbols (BIC
l
) are either control symbols (BRC
Description
k
7 0
k
l
7 0
)
l
)
e
1) or data symbols (BIC
e
1) or data symbols