s5920 Applied Micro Circuits Corporation (AMCC), s5920 Datasheet - Page 115
![no-image](/images/no-image-200.jpg)
s5920
Manufacturer Part Number
s5920
Description
Pci Product
Manufacturer
Applied Micro Circuits Corporation (AMCC)
Datasheet
1.S5920.pdf
(165 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
s5920Q
Manufacturer:
AMCC
Quantity:
5 510
- Current page: 115 of 165
- Download datasheet (3Mb)
S5920 – PCI Product: Mailbox Overview
Mailbox Interrupts
Although polling status is useful in some cases, polling requires continuous actions by the processor. Mailbox inter-
rupt capabilities are provided to avoid much of the processor overhead required by continuously polling status bits.
The Add-On and PCI interface can each generate interrupts on the incoming mailbox condition and/or the outgoing
mailbox condition. These can be individual enabled/disabled. A specific byte in the incoming mailbox and outgoing
mailbox is identified to generate the interrupt(s). The tasks required to setup the mailbox interrupts are as follows:
Enabling PCI mailbox interrupts:
Enabling Add-On mailbox interrupts:
With either the Add-On or PCI interface, these two steps can be performed with a single access to the appropriate
register. They are shown separately here for clarity.
Once interrupts are enabled, the interrupt service routine must access the mailboxes and clear the interrupt
source. A particular application may not require all of the steps shown. For instance, a design may only use the
incoming mailbox interrupts and not require support for the outgoing mailbox interrupts. The interrupt service rou-
tine tasks are as follows:
AMCC Confidential and Proprietary
1. Enable PCI outgoing mailbox interrupts. A specific byte within the outgoing mailboxes is identified to assert
2. Enable PCI incoming mailbox interrupts. A specific byte within the incoming mailboxes is identified to assert
1. Enable Add-On outgoing mailbox interrupts. A specific byte within the outgoing mailboxes is identified to
2. Enable Add-On incoming mailbox interrupts. A specific byte within the incoming mailboxes is identified to
INTA# when read by the Add-On interface.
INTA# when written by the Add-On interface.
assert IRQ# when read by the PCI interface.
assert IRQ# when written by the PCI interface.
INTCSR
INTCSR
INTCSR
INTCSR
AINT
AINT
AINT
AINT
Bit 4
Bits 1:0
Bit 12
Bits 9:8
Bit 12
Bits 9:8
Bit 4
Bits 1:0
Enable outgoing mailbox interrupts
Identify mailbox byte to generate interrupt
Enable incoming mailbox interrupts
Identify mailbox byte to generate interrupt
Enable outgoing mailbox interrupts
Identify mailbox byte to generate interrupt
Enable incoming mailbox interrupts
Identify mailbox byte to generate interrupt
Revision 1.02 – April 12, 2007
Data Book
DS1596
115
Related parts for s5920
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![S3065PB](/images/manufacturer_photos/0/0/70/applied_micro_circuits_corporation_tmb.jpg)
Part Number:
Description:
Ethernet Transceiver, AMCC Adds Multi-Rate Capability to its Line of Low Jitter OC-48 CMOS Transceivers, Tape and Reel
Manufacturer:
Applied Micro Circuits Corporation
![S3067TB20](/images/manufacturer_photos/0/0/70/applied_micro_circuits_corporation_tmb.jpg)
Part Number:
Description:
Ethernet Transceiver, AMCC Enhances OC-48 FEC Transceiver Solution, Unparalleled Jitter Performance and Extended Rate Capabilities Ideal for DWDM Applications
Manufacturer:
Applied Micro Circuits Corporation
![s5935qrc](/images/no-image3.png)
Part Number:
Description:
Pci Product
Manufacturer:
Applied Micro Circuits Corporation (AMCC)
Datasheet:
![NP3700](/images/no-image3.png)
Part Number:
Description:
5-gbps Network Processor With Integrated Traffic Manager
Manufacturer:
Applied Micro Circuits Corporation (AMCC)
Datasheet:
![NP3710](/images/no-image3.png)
Part Number:
Description:
5-gbps Network Processor With Integrated Traffic Manager
Manufacturer:
Applied Micro Circuits Corporation (AMCC)
Datasheet:
![NP3740](/images/no-image3.png)
Part Number:
Description:
5-gbps Network Processor With Integrated Traffic Manager
Manufacturer:
Applied Micro Circuits Corporation (AMCC)
Datasheet:
![NP3750](/images/no-image3.png)
Part Number:
Description:
Np3750 5-gbps Network Processor With Integrated Traffic Manager
Manufacturer:
Applied Micro Circuits Corporation (AMCC)
Datasheet:
![NP3705](/images/no-image3.png)
Part Number:
Description:
2.5-gbps Network Processor With Integrated Traffic Manager
Manufacturer:
Applied Micro Circuits Corporation (AMCC)
Datasheet:
![NP3450](/images/no-image3.png)
Part Number:
Description:
24 Fe + 2 Ge Integrated Packet Processor Npu, Tm, Switching, Macs
Manufacturer:
Applied Micro Circuits Corporation (AMCC)
Datasheet:
![NP3665](/images/no-image3.png)
Part Number:
Description:
Oc-24 / 2ge Packet Processor For Mobile Infrastructure
Manufacturer:
Applied Micro Circuits Corporation (AMCC)
Datasheet:
![S3086](/images/no-image3.png)
Part Number:
Description:
Continuous Rate Clock Recovery Unit
Manufacturer:
Applied Micro Circuits Corporation (AMCC)
Datasheet:
![sc3508qtd](/images/no-image3.png)
Part Number:
Description:
20-output Clock Driver
Manufacturer:
Applied Micro Circuits Corporation (AMCC)
Datasheet:
![s3155](/images/no-image3.png)
Part Number:
Description:
Sonet/sdh/atm Oc-48 Transceiver With Cdr
Manufacturer:
Applied Micro Circuits Corporation (AMCC)
Datasheet:
![s3157](/images/no-image3.png)
Part Number:
Description:
Gpon Transceiver With Cdr
Manufacturer:
Applied Micro Circuits Corporation (AMCC)
Datasheet:
![s3165](/images/no-image3.png)
Part Number:
Description:
Sonet/sdh/fec/fc/ge/hdtv/dtv/d1/escon Multirate 16-bit Transceiver
Manufacturer:
Applied Micro Circuits Corporation (AMCC)
Datasheet: