IDT77V400S156DS IDT, Integrated Device Technology Inc, IDT77V400S156DS Datasheet - Page 19

• Manufacturer Part Number: IDT77V400S156DS
• Description: IC SW MEMORY 8X8 1.2BGPS 208PQFP
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT77V400S156DS

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 208
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 77V400S156DS

Port Configuration Codes
Port Configuration Codes
Port Configuration Codes
Port Configuration Codes
MSb
IDT77V400
1.
both input and output ports.
2.
in the table are expressed in bus width, and represent the following maximum data rates per port based on ICLK or OCLK frequency:
When four bit busses are combined to obtain a higher bandwidth port, the specific CLK and FRM pin to be used for the new wider port is specified. If not specified the CLK and FRM
pins match the port number. It is suggested that unused ICLK and IFRM pins be pulled up to Vcc through a resistor, and that unused OCLK and OFRM pins be pulled down to Vss
through a resistor. The resistor value is not critical; 5K ohm or less is recommended.
3.
Codes table.
Configuration codes are used to initially configure the IDT77V400. These codes are applicable to both the input and output ports, and do not have to be configured the same for
The Data Path Interface (DPI) used by the input and output ports provides the option to combine the four bit data widths together to achieve a higher bandwidth port. The entries
This configuration is not supported by the IDT77V500 Switch Controller. Please use the alternate port assignment option immediately prior to this one in the Port Configuration
Code
Config
• 4 bit: 155Mbps
• 8 bit: 311Mbps
• 16 bit: 622Mbps
• 32 bit: 1.24Gbps
0010
0100
0110
1000
1010
0000
0001
0011
0101
0111
1001
1011
1101
1110
1111
110
3
1,2
3
3
3
3
3
LSb
4 bit
4 bit
4 bit
4 bit
4 bit
4 bit
0
8 bit, CLK/FRM 0
8 bit, CLK/FRM 0
8 bit, CLK/FRM 0
8 bit, CLK/FRM 0
8 bit, CLK/FRM 0
4 bit
4 bit
4 bit
4 bit
4 bit
4 bit
1
16 bit, CLK/FRM 0
16 bit, CLK/FRM 0
16 bit, CLK/FRM 0
16 bit, CLK/FRM 0
4 bit
4 bit
4 bit
4 bit
4 bit
2
8 bit, CLK/FRM 2
8 bit, CLK/FRM 2
8 bit, CLK/FRM 2
8 bit, CLK/FRM 2
8 bit, CKL/FRM 2
8 bit, CLK/FRM 2
19 of 26
Port Configuration
4 bit
4 bit
4 bit
4 bit
4 bit
3
32 bit, CLK/FRM 0
4 bit
4 bit
4 bit
4 bit
4 bit
4
8 bit, CLK/FRM 4
8 bit, CLK/FRM 4
8 bit, CLK/FRM 4
8 bit, CLK/FRM 4
8 bit, CLK/FRM 4
8 bit, CLK/FRM 4
4 bit
4 bit
4 bit
4 bit
4 bit
5
16 bit, CKL/FRM 4
16 bit, CLK/FRM 4
16 bit, CLK/FRM 4
16 bit, CLK/FRM 4
4 bit
4 bit
4 bit
4 bit
4 bit
4 bit
6
8 bit, CLK/FRM 6
8 bit, CLK/FRM 6
8 bit, CLK/FRM 6
8 bit, CLK/FRM 6
8 bit, CLK FRM 6
March 31, 2001
4 bit
4 bit
4 bit
4 bit
4 bit
4 bit
7