DS33R11 Maxim Integrated Products, DS33R11 Datasheet - Page 178
DS33R11
Manufacturer Part Number
DS33R11
Description
Network Controller & Processor ICs Ethernet Mapper with Integrated T1-E1-J1
Manufacturer
Maxim Integrated Products
Datasheet
1.DS33R11.pdf
(344 pages)
Specifications of DS33R11
Product
Framer
Number Of Transceivers
1
Supply Voltage (max)
1.89 V, 3.465 V
Supply Voltage (min)
1.71 V, 3.135 V
Supply Current (max)
100 mA
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Package / Case
BGA
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Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 0: Queue Loopback Enable (QLP) If this bit is set to 1, data from the Ethernet Interface receive queue is
looped back to the transmit queue. Buffered data from the serial interface will remain until the loopback is removed.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 3: CRCS If this bit is zero (default), the received MAC or Ethernet Frame CRC is stripped before the data is
encapsulated and transmitted on the serial interface. Data received from the serial interface is decapsulated, a
CRC is recalculated and appended to the packet for transmission to the Ethernet interface. If this bit is set to 1, the
CRC is not stripped from received packets prior to encapsulation and transmission to the serial interface, and data
received from the serial interface is decapsulated directly. No CRC recalculation is performed on data received
from the serial interface. Note that the maximum packet size supported by the Ethernet interface is still 2016 (this
includes the 4 bytes of CRC).
Bit 2: H10S This bit controls the 10/100 selection for RMII and DCE Mode. When in RMII mode, setting this bit to
1 will cause the MAC will operate at 100 Mbps and setting this bit to zero will cause the MAC to operate at 10
Mbps. When in DCE mode, the bit function is inverted – setting this bit to 1 will cause the MAC to operate at 10
Mbps. In DTE and MII mode, the MAC determines the data rate from the incoming TX_CLK and RX_CLK.
Bit 1: Automatic Flow Control Enable (ATFLOW) If this bit is set to 1, automatic flow control is enabled based on
the connection receive queue size and high watermarks. Pause frames are sent automatically in full duplex mode.
The pause time must be programmed through SU.MACFCR. The jam sequence will not be sent automatically in
half duplex mode unless the JAME bit is set. This bit is applicable only in software mode.
Bit 0: Jam Enable (JAME) If this bit is set to 1, a Jam sequence is sent for a duration of 4 bytes. This function is
only valid in half duplex mode, and will only function if Automatic Flow Control is disabled. Note that if the receive
queue size is less than receive high threshold, setting a JAME will JAM one received frame. If JAME is set and the
receiver queue size is higher than the high threshold, all received frames are jammed until the queue empties
below the threshold.
Note that
SU.GCR
7
0
7
0
-
-
is only valid in the software mode.
6
0
6
0
-
-
SU.LPBK
Ethernet Interface Loopback Control Register
14Fh
SU.GCR
Ethernet Interface General Control Register
150h
5
0
5
0
-
-
178 of 344
0
0
4
4
-
-
CRCS
3
0
3
0
-
H10S
2
0
2
0
-
ATFLOW
1
0
1
1
-
JAME
QLP
0
0
0
0
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