
DS21455/DS21458 Quad T1/E1/J1 Transceivers
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Table 5-2. DS21458 PIN DESCRIPTION
PIN
H2
E10
H3
G4
N7
B9
T7
G2
H6
J11
J5
H13
E8
N9
B10
M8
P8
D10
N8
P7
M7
R7
G1
G3
P4
P5
P6
C11
C12
C13
D3
E3
F3
L14
M14
N14
N4
N5
N6
D11
D12
D13
D4
E4
F4
L13
M13
N13
H8
J8
NAME
A0
A1
A2
A3
A4
A5
A6
A7/ALE (AS)
A8
A9
BPCLK1
BPCLK2
BPCLK3
BPCLK4
BTS
CS
D0/AD0
D1/AD1
D2/AD2
D3/AD3
D4/AD4
D5/AD5
D6/AD6
D7/AD7
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVDD
DVSS
DVSS
DVSS
DVSS
DVSS
DVSS
DVSS
DVSS
DVSS
DVSS
DVSS
DVSS
ESIBRD
ESIBS0
TYPE
I
I
I
I
I
I
I
I
I
I
O
O
O
O
I
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
I/O
I/O
FUNCTION
Address Bus Bit 0 (Lsb)
Address Bus Bit 1
Address Bus Bit 2
Address Bus Bit 3
Address Bus Bit 4
Address Bus Bit 5
Address Bus Bit 6
Address Bus Bit 7 (Msb)/Address Latch Enable
Address Bus Bit 8
Address Bus Bit 9
Backplane Clock, Transceiver 1
Backplane Clock, Transceiver 2
Backplane Clock, Transceiver 3
Backplane Clock, Transceiver 4
Bus Type Select (0 = Intel/1 = Motorola)
Chip Select
Data Bus Bit 0/Address/Data Bus Bit 0 (Lsb)
Data Bus Bit 1/ Address/Data Bus Bit 1
Data Bus Bit 2/Address/Data Bus Bit 2
Data Bus Bit 3/Address/Data Bus Bit 3
Data Bus Bit 4/Address/Data Bus Bit 4
Data Bus Bit 5/Address/Data Bus Bit 5
Data Bus Bit 6/Address/Data Bus Bit 6
Data Bus Bit 7/Address/Data Bus Bit 7 (Msb)
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Signal Ground
Digital Signal Ground
Digital Signal Ground
Digital Signal Ground
Digital Signal Ground
Digital Signal Ground
Digital Signal Ground
Digital Signal Ground
Digital Signal Ground
Digital Signal Ground
Digital Signal Ground
Digital Signal Ground
Extended System Information Bus Read
Extended System Information Bus 0