12. Serial RapidIO Registers > Serial Port Electrical Layer Registers
377
Tsi578 User Manual
June 6, 2016
Integrated Device Technology
www.idt.com
12.10.8
SRIO MAC x Digital Loopback and Clock Selection Register
This register consists of controls for Dead Link Timer and Digital Equipment Loopback (TX -> RX) as
well as clock selection on a per port basis.
Register name:
SMAC{0,2,4,6,8,10,12,14}_DLOOP_CLK_SEL
Reset value: Undefined
Register offset:130C8, 132C8, 134C8, 136C8,
138C8, 13AC8, 13CC8, 13EC8
Bits
0
1
2
3
4
5
6
7
00:07
DLT_EN
DLT_THRESH
08:15
DLT_THRESH
16:23
LINE_LB[3:0]
Reserved
MAC_MOD
E
DLB_
ODD_EN
DLB_
EVEN_EN
24:31
SWAP_TX
SWAP_RX
SOFT_RST
_X1
SOFT_RST
_X4
PWDN_X1
PWDN_X4
IO_SPEED
Bits
Name
Description
Type
Reset
Value
0
DLT_EN
Dead Link Timer Enable
0 = Disabled (default)
1 = Enabled
This timer is used to determine when a link is powered-up and enabled,
but dead (that is, there is no link partner responding). When a link is
declared dead, the transmitting port on the Tsi578 removes all packets
from its transmit queue and ensure that all new packets sent to port are
dropped rather than placed in the transmit queue.
This feature affects both RapidIO ports sharing the MAC. This feature is
not limited to lane 0 of the SerDes.
R/W
0
1:15
DLT_
THRESH
Dead Link Timer Threshold
Each time a silence is detected on a link, the counter is reloaded from
this register and starts to count down. When the count reaches 0, the
link is declared dead, which means that all packets are flushed from the
transmit queue and no new packets are admitted to the queue until the
link comes up.
The duration of the dead link timer is computed as:
2^^13 * (DLT_1) * P_CLK period.
If DLT_THRESH = 0, even when DLT_EN = 1, the counter is still
disabled.
duration = 8192*(DLT 1) * 10nS
default time = 2.68 sec
If DLT_THRESH = 1, time = 164uS.
R/W
0x7FFF
Содержание Tsi578
Страница 1: ...IDT Tsi578 Serial RapidIO Switch User Manual June 6 2016 Titl ...
Страница 20: ...About this Document 20 Tsi578 User Manual June 6 2016 Integrated Device Technology www idt com ...
Страница 102: ...4 Internal Switching Fabric Packet Queuing 102 Tsi578 User Manual June 6 2016 Integrated Device Technology www idt com ...
Страница 228: ...11 Signals Pinlist and Ballmap 228 Tsi578 User Manual June 6 2016 Integrated Device Technology www idt com ...
Страница 504: ...B Clocking P_CLK Programming 504 Tsi578 User Manual June 6 2016 Integrated Device Technology www idt com ...
Страница 526: ...Index 526 Tsi578 User Manual June 6 2016 Integrated Device Technology www idt com ...