DS3134 Maxim Integrated Products, DS3134 Datasheet - Page 64
DS3134
Manufacturer Part Number
DS3134
Description
IC CTRLR HDLC CHATEAU 256-BGA
Manufacturer
Maxim Integrated Products
Datasheet
1.DS3134.pdf
(203 pages)
Specifications of DS3134
Controller Type
HDLC Controller
Interface
Serial
Voltage - Supply
3 V ~ 3.6 V
Current - Supply
500mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
256-BGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Bit 8 / Receive 56 kbps (R56). If the Port is running a channelized application, this bit determines
whether the LSB of each DS0 should be processed or not. If this bit is set, then the LSB of each DS0
channel will not be routed to the HDLC controller (or the BERT if it has been enabled via the RBERT
bit). This bit does not affect the operation of the V.54 detector (it always searches on all 8 bits in the
DS0).
Bit 10 / Channelized Local LoopBack Enable (CLLB). Enabling this loopback forces the transmit data
to replace the receive data. This bit must be set for each and every DS0 channel that is to be looped back.
In order for the loopback to become active, the DS0 channel must be enabled (RCHEN = 1) and the DS0
channel must be set into the 64 kbps mode (R56 = 0).
Bit 12 / Receive V.54 Enable (RV54E). If this bit is cleared, this DS0 channel will not be examined to
see if the V.54 loop pattern is present. If set, the DS0 will be examined for the V.54 loop pattern. When
searching for the V.54 pattern within a DS0 channel, all 8 bits of the DS0 channel are examined
regardless of how the DS0 channel is configured (i.e. 64k or 56k).
Bit 14 / Route Data Into BERT (RBERT). Setting this bit will route the DS0 data into the BERT
function. If the DS0 channel has been configured for 56 kbps operation (R56 = 1), then the LSB of each
DS0 channel is not routed to the BERT block. In order for the data to make it to the BERT block, the
Host must also configure the BERT for the proper port via the Master Control register (see Section 4).
Bit 15 / Receive DS0 Channel Enable (RCHEN). This bit must be set for each active DS0 channel in a
channelized application. In a channelized application, although a DS0 channel is deactivated, the channel
can still be set up to route data to the V.54 detector and/or the BERT block. In addition, although a DS0
channel is active, the loopback function (CLLB = 1) overrides this activation and will route transmit data
back to the HDLC controller instead of the data coming in via the RD pin. In an unchannelized mode
(RUEN = 1), only the RCHEN bit in R[n]CFG0 needs to be configured.
Register Name:
Register Description: Transmit Layer 1 Configuration Register
Register Address:
Note: Bits that are underlined are read only, all other bits are read-write.
TCHEN
15
7
0 = 64 kbps (use all 8 bits in the DS0)
1 = 56 kbps (use only the first seven bits received in the DS0)
0 = loopback disabled
1 = loopback enabled
0 = do not examine this DS0 channel for the V.54 loop pattern
1 = examine this DS0 channel for the V.54 loop pattern
0 = do not route data to BERT
1 = route data to BERT
0 = deactivated DS0 channel
1 = active DS0 channel
TBERT
14
6
T[n]CFG[j] where n = 0 to 15 for each Port & j = 0 to 127 for each DS0
Indirect Access via CP[n]RD
TCH#(8): Transmit HDLC Channel Number
n/a
13
5
n/a
12
4
64 of 203
CNLB
11
3
n/a
10
2
TFAO
1
9
T56
0
8
DS3134
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