S/UNI®-JET Data Sheet
Released
Register 388H: TXCP-50 Transmit Cell Count (MSB)
Bit
Type
Function
Unused
Unused
Unused
Unused
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
X
X
X
X
X
X
X
X
Unused
R
R
R
TCELL[18]
TCELL[17]
TCELL[16]
TCELL[18:0]
The TCELL[18:0] bits indicate the number of cells read from the transmit FIFO and inserted
into the transmission stream during the last accumulation interval. Idle cells inserted into the
transmission stream are not counted.
A write to any one of the TXCP-50 Transmit Cell Counter Registers or to the S/UNI-JET
Identification, Master Reset, and Global Monitor Update Register (006H) loads the registers
with the current counter value and resets the internal 19 bit counter to 1 or 0. The counter
reset value is dependent on if there was a count event during the transfer of the count to the
Transmit Cell Counter Registers. The counter should be polled every second to avoid
saturating. The contents of these registers are valid after 24 TICLK periods containing cell
header or payload data (line or PLCP overhead periods do not count) after a transfer is
triggered by a write to a TXCP-50 Transmit Cell count Register or the S/UNI-JET
Identification, Master Reset, and Global Monitor Update Register (006H).
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990267, Issue 3
221
PMC [ PMC-SIERRA, INC ]
