
LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
83
Datasheet
Document Number: 249241
Revision Number: 010
Revision Date: 30-May-2006
C15,
B17
206
205
RxData6_0
RxData6_1
O, TS
O, TS, ID
Receive Data - Port 6.
Receive data signals (2-bit parallel di-bits) are driven
synchronously to REFCLK.
E16,
F14
198
197
RxData7_0
RxData7_1
O, TS
O, TS, ID
Receive Data - Port 7.
Receive data signals (2-bit parallel di-bits) are driven
synchronously to REFCLK.
E4,
C4,
A5,
B8,
B12,
D12,
B16,
E15
58
49
39
31
17
10
1
200
CRS_DV0
CRS_DV1
CRS_DV2
CRS_DV3
CRS_DV4
CRS_DV5
CRS_DV6
CRS_DV7
O, TS, SL,
ID
Carrier Sense/Receive Data Valid - Ports 0-7.
On detection of valid carrier, these signals are
asserted asynchronously with respect to REFCLK.
CRS_DVn is de-asserted on loss of carrier,
synchronous to REFCLK.
D2,
D5,
D7,
C8,
A12,
A15,
A17,
D17
59
50
40
32
20
11
2
201
RxER0
RxER1
RxER2
RxER3
RxER4
RxER5
RxER6
RxER7
O, TS, SL,
ID, I, ST
Receive Error - Ports 0-7.
These signals are synchronous to the respective
REFCLK. Active High indicates that received code
group is invalid, or that PLL is not locked.
The RxER signals have the following additional
function pins:
RxER0 (MDIX)
RxER1 (PAUSE)
RxER2 (PREASEL)
RxER4 (FIFOSEL0)
RxER5 (FIFOSEL1)
RxER6 {LINKHOLD)
Table 24. RMII Signal Descriptions – BGA23 (Sheet 3 of 3)
Ball/Pin
Designation
Symbol
Type1
Signal Description2,3
BGA23
PQFP
1. Type Column Coding: I = Input, O = Output, OD = Open Drain output, ST = Schmitt Triggered input, TS =
Three-State-able output, SL = Slew-rate Limited output, IP = weak Internal Pull-up, ID = weak Internal pull-
Down.
2. The IP/ID resistors are disabled during H/W Power-Down mode. If a Pin is an output or an I/O, the IP/ID
resistors are also disabled when the output is enabled.
3. RxData[0:7]_0, RxData[0:7]_1, CRS_DV[0:7] and RxER[0:7] outputs are three-stated in Isolation and H/W
Power-Down modes and during H/W reset.