PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
Register 078BH: TXPHY Data Type Field
Bit
Type
Function
Default
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POS_FIELD[7]
POS_FIELD[6]
POS_FIELD[5]
POS_FIELD[4]
POS_FIELD[3]
POS_FIELD[2]
POS_FIELD[1]
POS_FIELD[0]
ATM_FIELD[7]
ATM_FIELD[6]
ATM_FIELD[5]
ATM_FIELD[4]
ATM_FIELD[3]
ATM_FIELD[2]
ATM_FIELD[1]
ATM_FIELD[0]
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
The TXPHY Data Type Field is used in POS-PHY L3 mode of operation only and is provided as a
means to identify the type of traffic, ATM or packet, being sent over the POS-PHY L3 interface.
Selection of ATM and packet PHYs is done using the POS_SEL bit in the TXSDQ FIFO Indirect
Configuration register.
ATM_FIELD[7:0]
The ATM_FIELD register is provided to identify an ATM cell being transferred over the POS-
PHY L3 interface. When the incoming data is of type ATM cell, then the value of TDAT[31:24]
at the cycle in which the in-band address is inserted on TDAT[5:0] (ie. when TSX = 1) should
match ATM_FIELD[7:0]. Otherwise, an interrupt is signaled to indicate a data type
mismatch.
POS_FIELD[7:0]
The POS_FIELD register is provided to identify packet data being transferred over the POS-
PHY L3 interface. When the incoming data is of type packet, then the value of TDAT[31:24]
at the cycle in which the in-band address is inserted on TDAT[5:0] (ie. When TSX = 1) should
match POS_FIELD[7:0]. Otherwise, an interrupt is signaled to indicate a data type
mismatch.
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
376
PMC [ PMC-SIERRA, INC ]
