Analog Devices adsp-2100 Manual page 5

CHAPTER 7
7.1 OVERVIEW ........................................................................................ 7-1
7.2 HIP PIN SUMMARY ......................................................................... 7-2
7.3 HIP FUNCTIONAL DESCRIPTION ............................................... 7-4
7.4 HIP OPERATION .............................................................................. 7-6
7.4.1 Polled Operation .......................................................................... 7-7
7.4.1.1 HIP Status Synchronization ................................................. 7-8
7.4.2 Interrupt-Driven Operation ....................................................... 7-9
7.4.3 HDR Overwrite Mode................................................................. 7-9
7.4.4 Software Reset ............................................................................ 7-10
7.5 HIP INTERRUPTS ........................................................................... 7-10
7.6 HOST INTERFACE TIMING ......................................................... 7-11
7.7 BOOT LOADING THROUGH THE HIP ..................................... 7-16
CHAPTER 8
8.1 OVERVIEW ........................................................................................ 8-1
8.2 A/D CONVERSION ......................................................................... 8-2
8.2.1 Analog Input ................................................................................ 8-2
8.2.2 ADC
8.2.2.1 Decimation Filter ................................................................... 8-4
8.2.2.2 High Pass Filter ...................................................................... 8-5
8.3 D/A CONVERSION ......................................................................... 8-6
8.3.1 DAC
8.3.1.1 High Pass Filter ...................................................................... 8-6
8.3.1.2 Interpolation Filter ................................................................. 8-7
8.3.1.3 Analog Smoothing Filter & Programmable Gain Amp. .. 8-8
8.3.2 Differential Output Amplifier.................................................... 8-8
8.4 OPERATING THE ANALOG INTERFACE .................................. 8-9
8.4.1 Memory-Mapped Control Registers ......................................... 8-9
8.4.1.1 Analog Control Register ....................................................... 8-9
8.4.1.2 Analog Autobuffer/Powerdown Register ....................... 8-10
8.4.2 Memory-Mapped Data Registers ............................................ 8-11
8.4.3 ADC & DAC Interrupts ............................................................ 8-12
8.4.3.1 Autobuffering Disabled ...................................................... 8-12
8.4.3.2 Autobuffering Enabled ....................................................... 8-13
8.5 CIRCUIT DESIGN CONSIDERATIONS ...................................... 8-16
8.5.1 Analog Signal Input .................................................................. 8-16
8.5.2 Analog Signal Output ............................................................... 8-18
8.5.3 Voltage Reference Filter Capacitance ..................................... 8-19
HOST INTERFACE PORT
ANALOG INTERFACE
........................................................................................ 8-3
........................................................................................ 8-6
Contents
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