lxt9785 Intel Corporation, lxt9785 Datasheet - Page 80

• Manufacturer Part Number: lxt9785
• Description: Advanced 8-port 10/100 Mbps Phy Transceivers
• Manufacturer: Intel Corporation

LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
3.4
3.4.1
3.4.2
82
Table 24. Intel
BGA23 Signal Descriptions
Signal Name Conventions
Signal names may contain either a port designation or a serial designation, or a combination of the
two designations. Signal naming conventions are as follows:
Signal Descriptions – RMII, SMII, and SS-SMII Configurations
BGA23
•
•
•
1. Type Column Coding: I = Input, O = Output, OD = Open Drain output, ST = Schmitt Triggered input, TS =
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
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
E12
E6,
E2,
C3,
F4
D4
B5
A4
Designation
Three-State-able output, SL = Slew-rate Limited output, IP = weak Internal Pull-up, ID = weak Internal pull-
Down.
resistors are also disabled when the output is enabled.
Power-Down modes and during H/W reset.
Port Number Only. Individual signals that apply to a particular port are designated by the
Signal Mnemonic, immediately followed by the Port Designation. For example, Transmit
Enable signals would be identified as TxEN0, TxEN1, and TxEN2.
Serial Number Only. A set of signals which are not tied to any specific port are designated by
the Signal Mnemonic, followed by an underscore and a serial designation. For example, a set
of three Global Configuration signals would be identified as CFG_1, CFG_2, and CFG_3.
Port and Serial Number. In cases where each port is assigned a set of multiple signals, each
signal is designated in the following order: Signal Mnemonic, Port Designation, an
underscore, and the serial designation. For example, a set of three Port Configuration signals
would be identified as RxData0_0 and RxData0_1, RxData1_0 and RxData1_1, and
RxData2_0 and RxData2_1.
®
Ball/Pin
LXT9785/LXT9785E RMII Signal Descriptions – BGA23 (Sheet 1 of 3)
PQFP
44
61
62
52
53
42
43
6
TxData0_0
TxData0_1
TxData1_0
TxData1_1
TxData2_0
TxData2_1
REFCLK0
REFCLK1
Symbol
Type
I, ID
I, ID
I, ID
I
1
Signal Description
Reference Clock.
50 MHz RMII reference clock is always required. RMII
inputs are sampled on the rising edge of REFCLK,
RMII outputs are sourced on the falling edge.
“Clock/SYNC Requirements” on page 125.
CLK requirements.
Transmit Data - Port 0.
Inputs containing 2-bit parallel di-bits to be transmitted
from port 0 are clocked in synchronously to REFCLK.
Transmit Data - Port 1.
Inputs containing 2-bit parallel di-bits to be transmitted
from port 1 are clocked in synchronously to REFCLK
Transmit Data - Port 2.
Inputs containing 2-bit parallel di-bits to be transmitted
from port 2 are clocked in synchronously to REFCLK.
2,3
Revision Date: August 28, 2003
Document Number: 249241
Revision Number: 007
for detailed
Datasheet
See