DS26528G+ Maxim Integrated Products, DS26528G+ Datasheet - Page 150
DS26528G+
Manufacturer Part Number
DS26528G+
Description
IC TXRX T1/E1/J1 OCT 256-CSBGA
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Datasheet
1.DS26528G.pdf
(276 pages)
Specifications of DS26528G+
Number Of Drivers/receivers
4/4
Protocol
IEEE 1149.1
Voltage - Supply
3.135 V ~ 3.465 V
Mounting Type
Surface Mount
Package / Case
256-CSBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 7: Receive Channel Data Format (RDATFMT).
Bit 6: Receive Gapped Clock Enable (RGCLKEN).
Note: RGPCKEN and RDATFMT are not associated with the elastic store and are explained in the fractional
support section.
Bit 4: Receive Slip Zone Select (RSZS). This bit determines the minimum distance allowed between the elastic
store read and write pointers before forcing a controlled slip. This bit only applies during T1-to-E1 or E1-to-T1
conversion applications.
Bit 3: Receive Elastic Store Align (RESALGN). Setting this bit from 0 to 1 forces the receive elastic store’s
write/read pointers to a minimum separation of half a frame. No action is taken if the pointer separation is already
greater or equal to half a frame. If pointer separation is less than half a frame, the command is executed and the
data is disrupted. Should be toggled after RSYSCLK has been applied and is stable. Must be cleared and set again
for a subsequent align.
Bit 2: Receive Elastic Store Reset (RESR). Setting this bit from 0 to 1 forces the read pointer into the same frame
that the write pointer is exiting, minimizing the delay through the elastic store. If this command should place the
pointers within the slip zone (see bit 4), then an immediate slip occurs and the pointers move back to opposite
frames. Should be toggled after RSYSCLK has been applied and is stable. Do not leave this bit set HIGH.
Bit 1: Receive Elastic Store Minimum Delay Mode (RESMDM).
Bit 0: Receive Elastic Store Enable (RESE).
0 = 64kbps (data contained in all 8 bits)
1 = 56kbps (data contained in 7 out of the 8 bits)
0 = RCHCLK functions normally
1 = Enable gapped bit clock output on RCHCLK
0 = force a slip at 9 bytes or less of separation (used for clustered blank channels)
1 = force a slip at 2 bytes or less of separation (used for distributed blank channels and minimum delay
mode)
0 = elastic stores operate at full two-frame depth
1 = elastic stores operate at 32-bit depth
0 = elastic store is bypassed
1 = elastic store is enabled
RDATFMT
7
0
RGCLKEN
RESCR
Receive Elastic Store Control Register
085h + (200h x n): where n = 0 to 7, for Ports 1 to 8
6
0
—
5
0
150 of 276
RSZS
4
0
RESALGN
3
0
DS26528 Octal T1/E1/J1 Transceiver
RESR
2
0
RESMDM
1
0
RESE
0
0
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