EMC12 ETC2 [List of Unclassifed Manufacturers], EMC12 Datasheet - Page 47

• Manufacturer Part Number: EMC12
• Description: Audio Interface for the EmPack System
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

1.6
The EMC12 has a pair of status LEDs controlled by the DSP. The DSP can access these indic ators by
writing to any address between 0x800000 and 0xBFFFFF. The pair of LEDs display the value of the two
least significant bits written. The green LEDs corresponds to D1 and the yellow LED corresponds to
D0.
Note that, due to the physical memory wrapping around the 24-bit address space, writing to the LEDs will
also write data to the corresponding location in external RAM.
1.7
The EMC12 has a DS1620 temperature sensor. The TCK and TDI signals are connected to the CLK
and DQ pins of the DS1620. To send/receive serial data to/from the device, set the DS1620_EN bit in
BCR1. Reset the bit to finish the data transmission. Refer to the Dallas DS1620 Data Sheet for
information on the serial data format.
1.8
The EMC12 is implemented as a mezzanine in the EmPack system. It is secured to a heat spreader
which is, in turned, mounted on the EmPack card cage. The overall dimension of the board with the
spreader is 8.1” long, 5.5” wide, 0.3” high. The bottom mezzanine connector (P2) is a 60x2 position plug
and the top connector (J1) is a matching 60x2 position receptacle. The EMC12 board must be separated
from the EmPack baseboard and any other EMC12 mezzanine by either an EM6X32C mezzanine or an
EBX1 spacer.
A separate 4-pin standard disk drive power connector (P1) supplies +5V. The +12V is not used on this
board.
1.9
The EMC12 requires +5V, and +12V. The power consumption requirement depends on the clock speed
and the activity on the board. Power consumption has been empirically found to be as follows for boards
populated with and without a DSP:
Product part Number
EBC2 (without DSP)
EBC1 (with DSP @ 74 MHz)
09 Jan 2006
Display LEDs
Temperature Sensor
Mechanical Characteristics
Power Consumption
Communication Automation Corporation
Supply
12 volts
12 volts
5 volts
5 volts
EMC12 Hardware Reference Manual
Current
0.60 A
0.25 A
1.10 A
0.25 A
Power
3.0 W
3.0 W
5.5 W
3.0 W
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