Datasheet
are never assigned to physical channels. Once a Device is found, the ChannelAddresses used in normal operation
can be assigned.
MediaLB Devices are encouraged to support dynamic configuration, where a preset DeviceAddress is used to assign
the ChannelAddresses for each logical channel. Dynamic configuration avoids collisions of ChannelAddresses on
dif
ferent Devices.
To minimize collisions of DeviceAddresses, programmable Devices should assign the DeviceAddress via firmware.
For non-programmable Devices, it is strongly recommended to have only the upper bits fixed, and have the lower bits
configurable via pins on the Device. Having the lower bits configurable via pins minimizes collisions with other
manufacturer’s Devices, as well as allows multiple instances of the same Device to coexist on the same MediaLB
bus.
Table 48-4. DeviceAddress Grouping
Device Addresses Range Device Type
0x0002..0x017E – Reserved
0x0180..0x0186 4 External Host Controller Processors
0x0188..0x018E 4 General Processors
0x0190..0x0196 – Reserved
0x0198..0x019E – Reserved
0x01A0..0x01A6 4 Digital Signal Processors
0x01A8..0x01AE – Reserved
0x01B0..0x01B6 4 Decoder Chips
0x01B8..0x01BE – Reserved
0x01C0..0x01C6 4 Encoder Chips
0x01C8..0x01CE – Reserved
0x01D0..0x01DE 8 Digital-to-Analog Converters (DACs)
0x01E0..0x01E6 – Reserved
0x01E8..0x01EE – Reserved
0x01F0..0x01FC 7 Analog-to-Digital Converters (ADCs)
48.6.1.3 Command Bytes
The MediaLB Command field is eight-bits wide and all odd values are reserved; therefore, the LSB of Command is
always zero.
T
ransmitting MediaLB Devices (including the Controller) place Command on the MLBS line to indicate the type of
data being transmitted on the MLBD line.
Two types of MediaLB commands are defined: Normal and System. Normal commands are those sent by the
transmitting MediaLB Device (or Controller) in non-System Channels. System commands are those sent by the
MediaLB Controller in the System Channel.
Table 48-5. MediaLB RxStatus Responses
Value
(see
Note)
Command Description
Normal Commands (TX Device sends in non-system channels):
00h NoData No data to send out in this physical channel.
SAM E70/S70/V70/V71 Family
Media Local Bus (MLB)
© 2019 Microchip T
echnology Inc.
Datasheet
DS60001527D-page 1331