Maxim Integrated DS33R11 User Manual
Page 244
DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
244 of 344
Register Name:
TR.ESCR
Register Description:
Elastic Store Control Register
Register Address:
4Fh
Bit
# 7 6 5 4 3 2 1 0
Name TESALGN TESR TESMDM TESE RESALGN
RESR RESMDM RESE
Default
0 0 0 0 0 0 0 0
Bit 7: Transmit Elastic Store Align (TESALGN). Setting this bit from a 0 to a 1 forces the transmit elastic store’s
write/read pointers to a minimum separation of half a frame. No action is taken if the pointer separation is already
greater or equal to half a frame. If pointer separation is less than half a frame, the command is executed and the
data is disrupted. It should be toggled after TSYSCLK has been applied and is stable. It must be cleared and set
again for a subsequent align. See Section
Bit 6: Transmit Elastic Store Reset (TESR). Setting this bit from a 0 to a 1 forces the read and write pointers into
opposite frames, maximizing the delay through the transmit elastic store. Transmit data is lost during the reset. It
should be toggled after TSYSCLK has been applied and is stable. See Section
for details. Do not leave
this bit set HIGH.
Bit 5: Transmit Elastic Store Minimum-Delay Mode (TESMDM). See Section
for details.
0 = elastic stores operate at full two-frame depth
1 = elastic stores operate at 32-bit depth
Bit 4: Transmit Elastic Store Enable (TESE)
0 = elastic store is bypassed
1 = elastic store is enabled
Bit 3: Receive Elastic Store Align (RESALGN). Setting this bit from a 0 to a 1 forces the receive elastic store’s
write/read pointers to a minimum separation of half a frame. No action is taken if the pointer separation is already
greater or equal to half a frame. If pointer separation is less than half a frame, the command is executed and the
data is disrupted. It should be toggled after RSYSCLK has been applied and is stable. Must be cleared and set
again for a subsequent align. See Section
Bit 2: Receive Elastic Store Reset (RESR). Setting this bit from a 0 to a 1 forces the read and write pointers into
opposite frames, maximizing the delay through the receive elastic store. It should be toggled after RSYSCLK has
been applied and is stable. See Section
for details. Do not leave this bit set HIGH.
Bit 1: Receive Elastic Store Minimum-Delay Mode (RESMDM). See Section
for details.
0 = elastic stores operate at full two-frame depth
1 = elastic stores operate at 32-bit depth
Bit 0: Receive Elastic Store Enable (RESE)
0 = elastic store is bypassed
1 = elastic store is enabled