IDT77V550 Datasheet, PDF (11/19 Pages) List of Unclassifed Manufacturers – SwitchStarTM Switch Manager

IDT77V550
IDT77V500 Switch Controller Manager Bus Commands⁽¹⁾
Command
Command Description
Code (In Hex)
WRV
Write Per VC Table
01
RDV
Read Per VC Table
02
WRSL
Write Service Link Memory
03
RDSL
Read Service Link Memory
04
WRL
Write Cell Link Memory
05
RDL
Read Cell Link Memory
06
STAT
Read IDT77V500 status
07
LDCFG
Load IDT77V400 configuration bits
08
SUP
Cell setup
09
INIT
Initialize IDT77V500
0A
SEL
Select a IDT77V500
0B
START
End of IDT77V500 Initialization
0C
CBR
Set up a CBR Scheduler
0D
PARM
Set Parameters of the IDT77V500
0E
Table 10 IDT77V500 Switch Controller Manager Bus Commands
Note: 1.This table is provided as a reference of the available IDT77V500 Switch Controller commands. Additional information, including
command parameters and register definition, is available in the SwitchStar User's Manual, Section 3.
ATM Cell Format
The Switch Manager can either interpret a cell received on port number 7 or generate a cell to send back to the external control logic. The format
of Receive Control Cells and Transmit Control Cells is shows in the Tables below.
At power up the VPI/VCI address of a signaling cell will be set to VPI = 0x00, VCI[5:8] = 0x00, and VCI[7:0] is by pins SWAD0-7. By using the
change VCI address command it's possible to change the VCI[7:0] while VPI and VCI[15:8] is static 0x00, providing a total of 256 different addresses
to chose from. The same address is always used to both receive and transmit cells in the Switch Manager.
The Command number field is returned in an acknowledge cell. This field can have an unique value for each consecutive command send by the
controlling host, and thus can be used to make a sliding window mechanism for the command cells.
The VPI/VCI address of a transmitted cell will at power up be VPI = 0x00, VCI[15:8] = 0x00 and VCI[7:0] determined by pins SWAD0-7. The
VCI[7:0] can be changed by using the Change Switch Address command. The address of received and transmitted cells will always be the same.
The HEC field will be generated by the PHY.
IDT77V500 Switch Controller Manager Bus Commands⁽¹⁾
Byte Bits
Field Name
Value
Function
0
7-4
GFC
0xX
Ignored by Switch Manager
0-1
3-0; 7-4 VPI
0x00
Must be set to 0x00
1-2
3-0; 7-4 VCI 15-8
0x00
Must be set to 0x00
2-3
3-0; 7-4 VCI 7-0
0x00-0xFF
Set by SWAD0-7 or programmed in register
Table 11 IDT77V500 Switch Controller Manager Bus Commands (Part 1 of 2)
11 of 19
June 22, 2001