12. Serial RapidIO Registers > IDT-Specific RapidIO Registers
311
Tsi576 User Manual
June 6, 2016
Integrated Device Technology
www.idt.com
12.8.1
RapidIO Port x Discovery Timer
This register defines discovery-timer value for the serial ports in 4x mode..
Register name: SP{BC,0..15}_DISCOVERY_TIMER
Reset value: 0x90C0_0000
Register offset: 10000, 11000, 11100, 11200, 11300,
11400, 11500, 11600, 11700, 11800, 11900,
11A00, 11B00, 11C00, 11D00, 11E00, 11F00
Bits
0
1
2
3
4
5
6
7
00:07
DISCOVERY_TIMER
Reserved
08:15
PW_PRIORITY
Reserved
16:23
Reserved
24:31
Reserved
Bits
Name
Description
Type
Reset
Value
0:3
DISCOVERY_
TIMER
Discovery Timer
This field is used by serial ports configured to operate in 4x mode.
The discovery-timer allows time for the link partner to enter its
discovery state, and if the link partner supports 4x mode, for all four
lanes to be aligned.
The discovery timer has a value of 11.79 ms, with the P_CLK set to
100 MHz
• 0: 320
• {1:15}: DISCOVERY_TIMER (decimal) * 1179639 * 1/ P_CLK =
actual time
“P_CLK Programming” on page 495
for more
information on programming the P_CLK operating frequency.
R/W
9
4:7
Reserved
N/A
R
0
8:9
PW_PRIORITY
Port-write packet priority
This field sets the priority of a port-write packet. The priority can be
set from 0 to 3
00 = priority 0
01 = priority 1
10 = priority 2
11 = priority 3
R/W
11
10:31
Reserved
N/A
R
0
