
Page 81
Cortina Systems LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
LXT9785/LXT9785E
Datasheet
249241, Revision 11.0
16 April 2007
3.4 BGA23 Signal Descriptions
C2,
B1
55
54
RxData0_0
RxData0_1
O, TS
O, TS, ID
Receive Data - Port 0.
Receive data signals (2-bit parallel di-bits) are driven
synchronously to REFCLK.
A3,
B4
46
45
RxData1_0
RxData1_1
O, TS
O, TS, ID
Receive Data - Port 1.
Receive data signals (2-bit parallel di-bits) are driven
synchronously to REFCLK.
B6,
C7
37
36
RxData2_0
RxData2_1
O, TS
O, TS, ID
Receive Data - Port 2.
Receive data signals (2-bit parallel di-bits) are driven
synchronously to REFCLK.
D9,
B9
28
27
RxData3_0
RxData3_1
O, TS
O, TS, ID
Receive Data - Port 3.
Receive data signals (2-bit parallel di-bits) are driven
synchronously to REFCLK.
A13,
C12
16
15
RxData4_0
RxData4_1
O, TS
O, TS, ID
Receive Data - Port 4.
Receive data signals (2-bit parallel di-bits) are driven
synchronously to REFCLK.
B14,
B15
8
7
RxData5_0
RxData5_1
O, TS
O, TS, ID
Receive Data - Port 5.
Receive data signals (2-bit parallel di-bits) are driven
synchronously to REFCLK.
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.
Table 24
RMII Signal Descriptions – BGA23 (Sheet 2 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.