Rainbow Electronics DS26504 - Manual (Page 88)

DS26504 T1/E1/J1/64KCC BITS Element
88 of 128
Register Name:
LIC4
Register Description: Line Interface Control 4
Register Address: 33h
Bit
# 7 6 5 4 3 2 1 0
Name MPS1 MPS0 TT2 TT1 TT0 RT2 RT1 RT0
Default 0 0 0 0 0 0 0 0
HW
Mode MPS1
PIN 16
MPS0
PIN 15
— — — — — —
Bits 0 to 2: Receive Termination Select (RT0 to RT2)
RT2 RT1 RT0
EX133
(LIC3.5)
EXTERNAL
RESISTOR VALUE
RECEIVE TERMINATION
0 0 0 X — External Resistor Value
0 0 1 0 120 W 75W
0 0 1 1 133 W 75W
0 1 0 0 120 W 100W
0 1 0 1 133 W 100W
0 1 1 0 120 W 120W (External Resistor Value)
0 1 1 1 133 W 120W
1 0 0 0 120 W 110W
1 0 0 1 133 W 110W
1 0 1 1 133 W 133W (External Resistor Value)
1 1 0 X — External Resistor Value
1 1 1 X — External Resistor Value
Note: A fixed 133
W external resistor allows the internal termination to create all other termination values. A fixed
120 W external resistor allows the internal termination to create all other termination values except 133W.
Bits 3, 4, 5: Transmit Termination Select (TT0 to TT2)
TT2 TT1 TT0
INTERNAL TRANSMIT
TERMINATION CONFIGURATION
0 0 0 Termination Disabled
0 0 1 75Ω Enabled
0 1 0 100Ω Enabled
0 1 1 120Ω Enabled
1 0 0 110Ω Enabled
1 0 1 133 W Enabled
1 1 0 Disabled
1 1 1 Disabled
Bits 6 and 7: MCLK Prescaler (MPS0 and MPS1) (T1 Mode)
MCLK
(MHz)
MPS1 MPS0
JACKS0
(LIC2.3)
JACKS1
(LIC2.7)
1.544 0 0 0 0
3.088 0 1 0 0
6.176 1 0 0 0
12.352 1 1 0 0
12.80 0 0 1 1
2.048 0 0 1 0
4.096 0 1 1 0
8.192 1 0 1 0
16.384 1 1 1 0