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ORT4622 Datasheet(PDF) 35 Page - Agere Systems

Part # ORT4622
Description  Field-Programmable System Chip (FPSC) Four-Channel x 622 Mbits/s Backplane Transceiver
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Manufacturer  AGERE [Agere Systems]
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ORT4622 Datasheet(HTML) 35 Page - Agere Systems

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Lucent Technologies Inc.
35
Preliminary Data Sheet
ORCA ORT4622 FPSC
March 2000
Four-Channel x 622 Mbits/s Backplane Transceiver
Lucent Technologies Inc.
Memory Map (continued)
Table 10. Memory Map Bit Descriptions
* The error insertion is based on a rising edge detector. As such, the control must be set to value 0 before trying to initiate a second A1/A2
corruption.
The error insertion is based on a rising edge detector. As such, the control must be set to value 0 before trying to initiate a second B1
corruption.
Powerup Sequencing for ORT4622 Device
ORCA Series ORT4622 device uses two power supplies: one to power the device I/Os and the ASIC core (VDD),
which is set to 3.3 V for 3.3 V operation and 5 V tolerance on input pins, and another supply for the internal FPGA
logic (VDD2), which is set to 2.5 V. It is understood that many users will derive the 2.5 V core logic supply from a 3.3
V power supply, so the following recommendations are made for the powerup sequence of the supplies and allow-
able delays between power supplies reaching stable voltages. In general, both the 3.3 V and the 2.5 V supplies
should ramp-up and become stable as close together in time as possible. There is no delay requirement if the
VDD2
(2.5 V) supply becomes stable prior to the VDD (3.3 V) supply. There is a delay requirement imposed if the VDD
supply becomes stable prior to the VDD2 supply. The requirement is that the VDD2 (2.5 V) supply transition from
0 V to 2.3 V within 15.7 ms if the VDD (3.3 V) supply is already stable at a minimum of 3.0 V. If the VDD supply has
not yet reached 3.0 V when the VDD2 supply has reached 2.3 V, then the requirement is that the VDD2 supply
reach a minimum of 2.3 V within 15.7 ms of when the VDD supply reaches 3.0 V. If the chosen power supplies can-
not meet this delay requirement, it is always possible to hold off configuration of the FPGA by asserting INIT or
PRGM until the VDD2 supply has reached 2.3 V. This process eliminates any power supply sequencing issues.
Bit/Register Name(s
)
Bit/ Register
Location (hex)
Register
Type
Default
Value
(hex)
Description
Channel Register Block (Channel A, Channel B, Channel C, Channel D) (continued)
ES overflow flags 12, 9, 6, 3
ES overflow flags 11, 8, 5, 2, 10, 7, 4, 1
enable/mask register 12, 9, 6, 3
enable/mask register 11, 8, 5, 2, 10, 7, 4, 1
2e, 46, 5e, 76 [7:0]
2f, 47, 5f, 77 [3:0]
30, 48, 60, 78 [7:0]
31, 49, 61, 79 [7:0]
—4’h0
8’h00
4’h0
8’h00
These are the elastic store overflow
alarm flags.
LVDS link B1 parity error counter
32, 4a, 62, 7a [7:0]
counter
8’h00
7-bit count + overflow-reset on read.
LOF counter
33, 4b, 63, 7b [7:0]
counter
8’h00
7-bit count + overflow-reset on read.
A1/A2 frame error counter
34, 4c, 64, 7c [7:0]
counter
8’h00
7-bit count + overflow-reset on read.


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