Spectrum Digital eZdsp R2812 USB, Technical Reference, Page: 13 / 46

2-1
Chapter 2
Operation of the eZdsp
TM
R2812
This chapter describes the operation of the eZdsp
TM
R2812, key
interfaces and includes a circuit board outline.
Topic Page
2.0 The eZdsp
TM
R2812 Operation 2-2
2.1 The eZdsp
TM
R2812 Board 2-2
2.1.1 Power Connector 2-3
2.2 eZdsp
TM
R2812 Memory 2-3
2.2.1 Memory Map 2-4
2.2.2 External Memory Timing 2-5
2.3 eZdsp
TM
R2812 Connectors 2-6
2.3.1 P1, JTAG Interface 2-7
2.3.2 P2, Expansion Interface 2-8
2.3.3 P3, USB Port/JTAG Interface 2-10
2.3.4 P4,P8,P7, I/O Interface 2-10
2.3.5 P5,P9, Analog Interface 2-12
2.3.6 P6, Power Connector 2-14
2.3.7 Connector Part Numbers 2-15
2.4 eZdsp
TM
R2812 Jumpers 2-15
2.4.1 JP4, JP5 Voltage Jumpers 2-16
2.4.1.1 JP4, +3.3/5 Volts for P8, P4 2-17
2.4.1.2 JP5, +3.3/5 Volts for P2 2-18
2.5 Switch SW501 2-19
2.5.1 Switch SW501, Position 1, PLL Enable/Disable 2-19
2.5.2 Switch SW501, Position 2, XMP/MCn Mode Select 2-20
2.5.3 Switch SW501, Position 3,4, Boot Mode Select 2-20
2.6 LEDs 2-21
2.7 Test Points 2-21