IDT77V1253L25PGI IDT, Integrated Device Technology Inc, IDT77V1253L25PGI Datasheet - Page 33

• Manufacturer Part Number: IDT77V1253L25PGI
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT77V1253L25PGI

• Data Rate: 25.6/51.2Mbps
• Number Of Channels: 3
• 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

LED DRIVER AND HEC STATUS/CONTROL REGISTERS
TRIPLE PORT PHY (PHYSICAL LAYER) FOR 25.6
AND 51.2 MBPS ATM NETWORKS
HIGH BYTE COUNTER REGISTERS [15:8]
LOW BYTE COUNTER REGISTERS [7:0]
COUNTER SELECT REGISTERS
NOTE: Only one bit may set at any time for proper operation
Addresses: 0x04, 0x14, 0x24
Addresses: 0x05, 0x15, 0x25
Addresses: 0x06, 0x16, 0x26
Addresses: 0x03, 0x13, 0x23
[7:0]
[7:0]
Bit
Bit
Bit
Bit
4,3
7
6
5
4
3
2
0
1
7
6
5
2
0
1
Type
Type
Type
Type
R/W
R/W
R/W
____
____
____
____
W
W
W
W
R
R
R
R
R
00 = 1 cycle
Initial State
Initial State
Initial State
Initial State
0 = enable
0 = enable
calculate &
1 = empty
checking
replace
0x00
0x00
0
0
0
0
0
0
0
0
0
1
1
Provides low-byte of counter value selected via registers 0x06, 0x16 and 0x26.
Provides high-byte of counter value selected via registers 0x06, 0x16 and 0x26.
Reserved.
Reserved.
Reserved.
Reserved.
Symbol Error Counter.
RxCell Counter.
Receive HEC Error Counter.
TxCell Counter.
Reserved
Disable Receive HEC Checking (HEC Enable)
Disable Xmit HEC Calculate & Replace
bit #
FIFO Status
RxLED Status
When not set, the HEC is calculated on first 4 bytes of received cell, and compared against the 5th byte.
When set (= 1), the HEC byte is not checked.
When set, the 5th heade r byte of cells queued for transmit is not replaced with the HEC calculated across
the first four bytes of that cell.
RxREF Pulse Width Select
TxLED Status
0
0
1
1
4
0 RxREF active for 1 OSC cycle
1 RxREF active for 2 OSC cycles
0 RxREF active for 4 OSC cycles
1 RxREF active for 8 OSC cycles
3
.
1 = TxFIFO empty
0 = Cell Transmitted
0 = Cell Received
33
0 = TxFIFO not empty
1 = Cell not Transmitted
1 = Cell not Received
Function
Function
Function
Function
IDT77V1253
4781 tbl 19
4781 tbl 20
4781 tbl 21
4781 tbl 18