st802rt1a STMicroelectronics, st802rt1a Datasheet - Page 34

• Manufacturer Part Number: st802rt1a
• Description: 10/100 Real-time Ethernet 3.3 V Transceiver
• Manufacturer: STMicroelectronics

Registers and descriptors description
Table 27.
34/58
15:14
Bit
7:0
13
12
11
10
9
8
MDIX Disable
Jabber detect
MDIX Status
RESERVED
RESERVED
RESERVED
MDIX Swap
Bit name
Changed
Polarity
RN1C [0d28, 0x1C]: 10Base-T error and general status register
MDIX status: This bit indicates whether MDI or MDIX is in use.
MDIX swap: Setting this bit forces the device to MDIX. When this bit is 0, the MDIX status is
determined by auto-negotiation if auto-MDIX is enabled.
MDIX disable: Setting this bit disables auto-detection and negotiation of MDIX. Clearing this
bit enables auto-MDIX.
---
1 -> MDI-X configuration used
0 -> MDI configuration used
1 -> MDIX force (if not in fx_mode)
0 -> Normal operation
1 -> MDIX auto-detection and negotiation disabled
0 -> MDI-MDIX auto-detection enabled
---
1 -> Jabber condition detected
0 -> No jabber condition detected.
Set at jabber condition detection, cleared only after register read
(if no more jabber condition is present). Fixed to 0 in 100Base-X
modes. Same as RN01[1] and RN19[0]
1 -> Polarity changed event
0 -> No polarity changes
---
Doc ID 17049 Rev 1
Description
ST802RT1A, ST802RT1B
Default
001001
11b
00
0
0
1
0
0
0
Type
RW
RW
RW
RW
RO
RO
RO
RO
RO
P(LH)
Type
LH
-
-
-
-
-
-