80KSBR200 Datasheet, PDF (98/172 Pages) Integrated Device Technology – sRIO SERIAL BUFFER FLOW-CONTROL DEVICE

IDT 80KSBR200
Notes
Name: CNT_MEM_ADDR
Address: 0x18584
Advanced Datasheet*
Bit
Field Name
Type
Reset
Value
Comment
30:0 CNT_MEM_ADDR RW
31h0
Current Memory Address:
Used to hold the current memory address
31
-
0
Reserved
Table 70 Missing Packet Current Address Register
Memory Address Increment Register
Name: MEM_ADDR_MEM
Address: 0x18588
Bit
Field Name
Type
Reset
Value
Comment
5:0
MEM_ADDR_INC RW
6h0
Memory Address Increment:
Used to predict next current memory address
31:6 -
0
Reserved
Table 71 Missing Packet Address Increment Register
Memory Stop Address Register
Name: MEM_STOP_ADDR
Address: 0x1858C
Bit
Field Name
Type
Reset
Value
Comment
30:0 MEM_STOP_ADDR RW
31h0
Memory Stop Address:
The last allowed memory address
31
-
0
Reserved
Note:
1.
Table 72 Missing Packet Stop Address Register
The stop address must align with the start address and the address increment. A misalignment may cause the
stop address to be missed.
8.2.14 Packet Interval Timer Register
The PPS has no storage capability and cannot accept packets faster that its processing capability. To solve this
problem, both the data packets and the doorbells exiting S-Port 1 may be timed with a programmable interval timer. The
interval timer uses the PHY clock 156.25MHz as the tick. A set interval is programmed into the PPS Packet Interval Timer
Register. When a packet is sent using sRIO out S-Port 1, the interval timer will begin counting down, starting when the
packet has completed. When the counter reaches zero, a following packet may be sent. The PPS acceptance of doorbells
is much faster than data packets: therefore, they will be accomplished by a second counter with the countdown initiated
when the doorbell starts.
Data Packet Interval Timer Register
98 of 172
March 19, 2007
„2005 Integrated Device Technology, Inc. All rights reserved. Advanced Datasheet for informational purposes only. Product specifications subject to change without notice.NOT AN OFFER FOR SALE The information presented herein is subject to a
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