STE10 Datasheet, PDF (31/66 Pages) STMicroelectronics – PCI 10/100 ETHERNET CONTROLLER WITH INTEGRATED PHY 5V

STE10/100
5.3 Transceiver(XCVR) Registers
There are 11 16-bit registers supporting the transceiver portion of STE10/100, including 7 basic registers de-
fined according to clause 22 “Reconciliation Sublayer and Media Independent Interface” and clause 28 “Physi-
cal Layer link signaling for 10 Mb/s and 100 Mb/s Auto-Negotiation on twisted pair” of the IEEE802.3u standard.
In addition, 4 special registers are provided for advanced chip control and status.
Note: 1. Since only Double Word access is supported for Register R/W in the STE10/100, the higher word(bit 31~16) of the XCVR registers
(XR0~XR10) should be ignored.
Table 7. Transceiver registers list
Offset from
base address
of CSR
Reg. Index
Name
b4h
XR0
XCR
b8h
XR1
XSR
bch
XR2
PID1
c0h
XR3
PID2
c4h
XR4
ANA
c8h
XR5
ANLPA
cch
XR6
ANE
d0h
XR7
XMC
d4h
XR8
XCIIS
d8h
XR9
XIE
dch
XR10
100CTR
Register Descriptions
XCVR Control Register
XCVR Status Register
PHY Identifier 1
PHY Identifier 2
Auto-Negotiation Advertisement Register
Auto-Negotiation Link Partner Ability Register
Auto-Negotiation Expansion Register
XCVR Mode Control Register
XCVR Configuration Information and Interrupt Status Register
XCVR Interrupt Enable Register
100BASE-TX PHY Control/Status Register
Table 8. Transceiver registers Descriptions
Bit #
Name
Descriptions
Default Val RW Type
XR0(offset = b4h) - XCR, XCVR Control Register. The default value is chosen as listed below.
15
XRST Transceiver Reset control.
0
R/W
1: reset transceiver. This bit will be cleared by STE10/100 after
transceiver reset has completed.
14
XLBEN Transceiver loop-back mode select.
0
R/W
1: transceiver loop-back mode is selected. OM (CSR6 bits
11,10) of must contain 00.
13
SPSEL Network Speed select. This bit will be ignored if Auto-
Negotiation is enabled (ANEN, XR0 bit 12).
1:100Mbps is selected.
0:10Mbps is selected.
1
R/W
12
ANEN Auto-Negotiation ability control.
1: Auto-Negotiation function is enabled.
0: Auto-Negotiation is disabled.
1
R/W
31/66