4. Register Descriptions
159
Tsi308 User Manual
80D4000_MA001_02
Tundra Semiconductor Corporation
www.tundra.com
Register Offset : 77h–74h
Bit
R/W
Access
Initial
Value
Field Name and Description
31:27
R
00h
Current Tx Up:
Current impedance value for transmit pull-up resistor.
26:22
R
00h
Current Tx Down:
Current impedance value for transmit pull-down resistor.
21:17
R
00h
Current Rx Term:
Current impedance value for receive termination resistor.
16:12
R/W
10h
Rx Term:
Impedance value for receive termination resistor. Used when RxSel is set. Not
persistent through warm reset.
11
R/W
0
Rx Select:
Enables use of CSR receive impedance values. Not persistent through warm
reset.
10:6
R/W
10h
Tx Up:
Impedance value for transmit pull-up resistor. Used when TxSel is set. Not
persistent through warm reset.
5:1
R/W
00h
Tx Down:
Impedance value for transmit pull-down resistor. Used when TxSel is set. Not
persistent through warm reset.
0
R/W
0
Tx Select:
Enables use of CSR transmit impedance values. Not persistent through warm
reset.
Summary of Contents for TSI308
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