PRELIMINARY
PM4318 OCTLIU
DATASHEET
PMC- 2001578
ISSUE 3
OCTAL E1/T1/J1 LINE INTERFACE DEVICE
Pin Name
Type
Pin
No.
Function
TXRING1[1]
TXRING1[2]
TXRING1[3]
TXRING1[4]
TXRING1[5]
TXRING1[6]
TXRING1[7]
TXRING1[8]
Analogue A13
Transmit Analogue Negative Pulse (TXRING1[8:1] and
Output
J22
P22
TXRING2[8:1]). When the transmit analogue line interface is
enabled, the TXRING1[x] and TXRING2[x] analogue outputs drive
AB13 the transmit line pulse signal through an external matching
AB8
M1
G1
A8
transformer. Both TXRING1[x] and TXRING2[x] are normally
connected to the negative lead of the transformer primary. Two
outputs are provided for better signal integrity and must be
shorted together on the board.
TXRING2[1]
TXRING2[2]
TXRING2[3]
TXRING2[4]
TXRING2[5]
TXRING2[6]
TXRING2[7]
TXRING2[8]
A14
H22
R22
After a reset, TXRING1[x] and TXRING2[x] are high impedance.
The HIGHZ bit of the octant’s XLPG Line Driver Configuration
register must be programmed to logic 0 to remove the high
AB14 impedance state.
AB7
N1
F1
A7
Receive Line Interface
RXTIP[1]
RXTIP[2]
RXTIP[3]
RXTIP[4]
RXTIP[5]
RXTIP[6]
RXTIP[7]
RXTIP[8]
Analogue G21
Receive Analogue Positive Pulse (RXTIP[8:1]). When the
analogue receive line interface is enabled, RXTIP[x] samples the
received line pulse signal from an external isolation transformer.
RXTIP[x] is normally connected directly to the positive lead of the
receive transformer secondary.
Input
J21
R21
R19
R4
P1
J3
G3
RXRING[1]
RXRING[2]
RXRING[3]
RXRING[4]
RXRING[5]
RXRING[6]
RXRING[7]
RXRING[8]
Analogue H19
Receive Analogue Negative Pulse (RXRING[8:1]). When the
analogue receive line interface is enabled, RXRING[x] samples
the received line pulse signal from an external isolation
transformer. RXRING[x] is normally connected directly to the
negative lead of the receive transformer secondary.
Input
J19
P19
U22
R3
P4
J4
H4
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
19
PMC [ PMC-SIERRA, INC ]
