PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
Indirect Register 0138H: TTTP SECTION Trace Configuration
Bit
Type
Function
Default
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
ZEROEN
BYTEEN
LENGTH16
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
R/W
R/W
R/W
0
0
0
Bit 1
Bit 0
LENGTH16:
The message length (LENGTH16) bit selects the length of the tail trace message to be
transmitted. When LENGTH16 is set to logic 1, the length of the tail trace message is 16
byte. When LENGTH16 is set to logic 0, the length of the tail trace message is 64 byte.
BYTEEN:
The single byte message enable (BYTEEN) bit enables the single byte tail trace message.
When BYTEEN is set to logic 1, the length of the tail trace message is 1 byte. When
BYTEEN is set to logic 0, the length of the tail trace message is determined by LENGTH16.
BYTEEN has precedence over LENGTH16.
ZEROEN:
The all zero message enable (ZEROEN) bit enables the transmission of an all zero tail trace
message. When ZEROEN is set to logic 1, an all zero message is transmitted. When
ZEROEN is set to logic 0, the RAM message is transmitted. The enabling and disabling of
the all zero tail trace message is not done on message boundary since the receiver is
required to perform filtering on the message.
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
198
PMC [ PMC-SIERRA, INC ]
