AMx ARM® Cortex™-A8 Microprocessors. (MPUs). Technical Reference Manual. Literature Number: SPRUH73C. October –Revised. AMx ARM® Cortex™-A8 Microprocessors. (MPUs). Technical Reference Manual. Literature Number: SPRUH73J. October –Revised December . Read about ‘TI: Technical Reference Manual for AMx ARM Cortex-A8 Microprocessors (MPUs)’ on elementcom. TI: Technical Reference.

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The advantage of pacing is zm335x a greater throughput is achieved while disadvantage is that if any critical packets need to be serviced immediately, it’s possible that some delay may occur. This page was last modified on 27 Februaryat This page has been accessed 34, times. This is the memory from where ARM core operates. Please note as of Wednesday, August 15th, this wiki has been set to read only.

It is not intended for use in end products. All packets in queue 0 are cyclic packets. For wm335x support please post your questions at http: The following timing diagram explains the use of TTS. The entire reset supervisor circuit can be seen in Figure 3. The LLD expects single interrupt for both Ports. The Transmit path on host is simpler than the Rx path. This module is applicable only in Switch mode, in EMAC mode this module is disabled since there is only one port.

The corresponding API for this is. Similar to enablement, variable set to False. Xm335x overflow can occur. But these map to the same interrupt and ISR per port i. If you are a TI Employee and require Edit ability ttm contact x from the company directory.


Queue 1 and Queue 3 are high priority queues for Port 1 and Port 2 respectively. TTS reduces the transmission jitter from 10us range to 40ns.

ICSS EMAC LLD developers guide – Texas Instruments Wiki

Push buttons are susceptible to ground bounce which may lead to multiple resets or partial resets. IP address, network mask and other params can be set through the NDK configuration file. Serial number of the board. USB power 5V is provided to this connector through a buck-boost converter circuit. Port0 Statistics Map provided above.

The sizes are limited by L3 size which are dictated by SoC. Storm prevention is implemented on the two PRU’s as a credit based scheme.

When a packet is received in firmware, the 3 bit PCP field of the VLAN tag is read and the packet is copied to the appropriate queue based on fixed mapping which maps 2 levels out of 8 of QoS to one queue. Only one cyclic packet will be sent out in each cycle irrespective of the number of cyclic packets available yrm Queue 0. NOTE When a queue overflows, packets are not automatically copied to the next free queue.

The guide is geared towards helping developers with starting to build applications using the Ethernet MAC and as such does not contain extensive architectural and design information. The goal of providing this is to help the developer in debugging.


Collisions are handled using ageing counters, one ageing counter is associated with each of the 4 entries inside a bucket. The interrupt configuration is explained in detail in the interrupts section.

OSD335x Reset Circuitry

Queue 0 high priority queue is reserved as the real-time queue. For switch this is the Rx interrupt for both ports.

Other applications might have their own map. The members of PRU statistics are listed in the memory map.

AMxStarterKitHardwareUsersGuide – Texas Instruments Wiki

The Pin assignment is as given below. The board contains a serial EEPROM with the board specific data which allows the processor to automatically detect which board is connected and the version of that board. On the other hand, packets from other queues are acyclic packets.

Cold Reset and Warm Reset. This provides reliability for real time traffic. The TRM’s can be found here. L3 map is not of much use to the developer while DDR map is dynamic and is part of the application. The driver is written in a manner such that there is very little dependency on the Operating System.

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