IDT77V1254L25PGI IDT, Integrated Device Technology Inc, IDT77V1254L25PGI Datasheet - Page 34

• Manufacturer Part Number: IDT77V1254L25PGI
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT77V1254L25PGI

• Data Rate: 25.6/51.2Mbps
• Number Of Channels: 4
• Type Of Atm Phy Interface: DPI/UTOPIA
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Pin Count: 144
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Not Compliant

Status and Control Register List
only one register (0x40) which is not port specific.
sponding to the port which is selected at that particular time. For consistent operation, the Utopia control bits should be programmed the same for all
four ports, except for the Utopia 2 port addresses in the Enhanced Control Registers.
Nomenclature
"Reserved" register bits, if written, should always be written "0"
R-only or W-only = register is read-only or write-only
“0” = ‘cleared’ or ‘not set’
Master Control Registers
Interrupt Status Registers
Diagnostic Control Registers
LED Driver and HEC Status/control
Low Byte Counter Register [7:0]
High Byte Counter Register [15:8]
Counter Registers Read Select
Interrupt Mask Registers
Enhanced Control 1 Registers
RXREF and TXREF Control Register
IDT77V1254L25
The 77V1254L25 has 37 registers that are accessible through the utility bus. Each of the four ports has 9 registers dedicated to that port. There is
For those register bits which control operation of the Utopia interface, the operation of the Utopia interface is determined by the registers corre-
Register Name
Pulse PE-67583 or R4005
TDK TLA-6M103
Pulse R4005
C1
C2
L1
Component
Table 4 Analog Component Values (Part 2 of 2)
Magnetics Modules for 25.6 Mbps
Magnetics Module for 51.2 Mbps
Port 0
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
R/W = register may be read and written via the utility bus
sticky = register bit is cleared after the register containing it is read; all sticky bits are read-only
“1” = ‘set’
Table 5 Magnetics Modules
34 of 48
470pF
470pF
3.3 H
Value
Port 1
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
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±20%
±20%
±20%
Tolerance
Register Address
Port 2
0x20
0x21
0x22
0x23
0x24
0x25
0x26
0x27
0x28
Port 3
0x30
0x31
0x32
0x33
0x34
0x35
0x36
0x37
0x38
All Ports
0x40
December 2004