DS3181 Maxim Integrated Products, DS3181 Datasheet - Page 62
DS3181
Manufacturer Part Number
DS3181
Description
Network Controller & Processor ICs DS3-E3 ATM-Packet PH Y with Built-in Line
Manufacturer
Maxim Integrated Products
Datasheet
1.DS3184DK.pdf
(400 pages)
Specifications of DS3181
Product
Framer
Number Of Transceivers
1
Data Rate
44.736 Mbps
Supply Voltage (max)
3.465 V
Supply Voltage (min)
3.135 V
Supply Current (max)
280 mA
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Package / Case
TEBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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RMOD[1:0]
RERR
RVAL
PIN
TYPE
Oz
Oz
Oz
Receive Packet Data Valid (tri-state)
This signal is tri-state when global reset is applied.
RVAL: In POS-PHY L2 or POS-PHY L3 modes, this signal is used to indicate the
validity of a receive data transfer. When RVAL is high, the receive data bus (RDATA,
RPRTY, RSOX, REOP, RMOD, and RERR) is valid and a packet data transfer
occurs. When RVAL is low, the receive data bus is invalid and a data transfer does
not occurs. This signal is updated on the rising edge of RSCLK.
RVAL goes high when a port is selected for packet data transfer and the port has a
programmable size block of data or an end of packet ready for transfer. In POS-PHY
L2 mode, RVAL goes low if the selected port is empty, at the end of a packet, or
when REN is deasserted. Once RVAL goes low, it will remain low until REN is
deasserted.
In POS-PHY L3 mode, RVAL goes low if the selected port is empty or at the end of a
packet if the minimum deassertion time is greater than zero. RVAL will remain
deasserted for the programmable minimum deassertion time.
In UTOPIA L3 mode, this signal is held low.
In POS-PHY L2 mode, this signal is driven when one of the ports is selected for data
transfer, and tri-stated when REN is deasserted, none of the ports is selected or data
path reset is active.
In UTOPIA L2 (reset default) mode this signal is tri-stated.
In all UTOPIA L3 or POS-PHY L3 modes this signal is driven.
Receive Packet Data Modulus [1:0] (Tri-State).
This signal is tri-state when global reset is applied.
RMOD[1:0]: In POS-PHY L2 or POS-PHY L3 modes, this signal is used to indicate
the number of valid bytes on the RDATA bus.
This signal is updated on the rising edge of RSCLK.
RMOD is only valid when REOP is high.
In UTOPIA L3, 8-bit POS-PHY L2 or 8-bit POS-PHY L3 modes, RMOD[1:0] signals
are held low.
In 16-bit POS-PHY L2 or 16 bit POS-PHY L3 modes, RMOD[1] is held low.
In POS-PHY L2 mode, these signals are driven when one of the ports is selected for
data transfer, and tri-stated when REN is deasserted, none of the ports is selected or
data path reset is active.
In UTOPIA L2 (reset default) mode these signals are tri-stated.
In UTOPIA L3 or POS-PHY L3 modes these signals are driven.
Receive Packet Error (Tri-State).
This signal is tri-state when global reset is applied.
RERR: In POS-PHY L2 or POS-PHY L3 modes, this signal is used to indicate that
the current packet is erred. When RERR is high, the current packet should be
aborted. This signal is updated on the rising edge of RSCLK.
RERR is only valid when REOP is high.
In UTOPIA L3 mode this signal is held low.
In POS-PHY L2 mode, this signal is driven when one of the ports is selected for data
transfer, and tri-stated when REN is deasserted, none of the ports is selected or data
path reset is active.
In UTOPIA L2 (reset default) mode this signal is tri-stated.
In UTOPIA L3 or POS-PHY L3 modes, this signal is driven.
RMOD[1:0]=00
RMOD[1:0]=01
RMOD[1:0]=10
RMOD[1:0]=11
62
RDATA[31:16] valid
RDATA[31:24] valid
RDATA[31:0] valid
RDATA[31:8] valid
FUNCTION
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