3X38FTR Datasheet, PDF (17/64 Pages) Agere Systems – OCTAL-FET (Fast Ethernet Transceiver) for 10Base-T/100Base-TX/FX

Preliminary Data Sheet
September 2000
3X38FTR 208-Pin SQFP
OCTAL-FET for 10Base-T/100Base-TX/FX
Pin Descriptions (continued)
Table 3. RMII/SMII Interface Pins (continued)
Pins
Signal
10, 14, 24, 29, RCRS_DV_[7:0]/
37, 44, 54, 62 STXD_[7:0]
11, 16, 34, 43, RRXER_[7, 6, 4,
56, 64
3, 1, 0]
49
RRXER_2/
SSYNC_3:0
25
RRXER_5/
SSYNC_7:4
Type
O
I
O
O
I
O
I
Description
RMII Carrier Sense and Receive Data Valid. The CRS_DV will be
asserted when valid data is being received. This signal is asserted
asynchronously.
SMII Transmit Data and Control. This signal transitions synchro-
nously with the RMCLK.
RMII Receive Error. Receive error is asserted for one or more
clock periods to indicate that a coding error or other error was
detected in the frame presently being transferred.
RMII Receive Error. Receive error is asserted for one or more
clock periods to indicate that a coding error or other error was
detected in the frame presently being transferred.
SMII Sync. Synchronization input to the 3X38 that segments the
boundaries between each receive data and control 10-bit seg-
ments. This input generates a sync pulse every 10 clock cycles.
RMII Receive Error. Receive error is asserted for one or more
clock periods to indicate that a coding error or other error was
detected in the frame presently being transferred.
SMII Sync. Synchronization input to the 3X38 that segments the
boundaries between each receive data and control 10-bit seg-
ments. There is a sync pulse once every 10 clock cycles.
Table 4. MII Management
Pins
74
75
69
Signal
MDC
MDIO
MASK_STAT_INT
Type
I
Description
Management Data Clock. This is the timing reference for the
transfer of data on the MDIO signal. This signal may be asynchro-
nous to RMCLK. The maximum clock rate is 12.5 MHz.
When running MDC above 6.25 MHz, MDC must be synchronous
with RMCLK and have a setup time of 15 ns and a hold time of 5 ns
with respect to RMCLK.
I/O Management Data Input/Output. This I/O is used to transfer con-
trol and status information between the 3X38 and the station man-
agement. Control information is driven by the station management
synchronous with MDC. Status information is driven by the 3X38
synchronous with MDC. This pin requires an external
1.5 kΩ pull-up resistor.
O Maskable Status Interrupt. This pin will go low whenever there is
a change in status as defined in Table 35 (register 31). This is an
open-drain output and requires a 10 kΩ pull-up resistor.
Lucent Technologies Inc.
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