Analog Devices ADSP-21261 SHARC Hardware Reference Manual page 13

Setting Up DMA ........................................................................ 7-30
PARALLEL PORT
Parallel Port Pins ........................................................................... 8-3
Alternate Pin Functions ........................................................... 8-4
Parallel Ports as FLAG Pins ................................................. 8-4
Parallel Data Acquisition Port as Address Pins ...................... 8-5
Parallel Port Operation .................................................................. 8-5
Basic Parallel Port External Transaction .................................... 8-5
Reading From an External Device or Memory .......................... 8-6
Writing to an External Device or Memory ................................ 8-7
Transfer Protocol ..................................................................... 8-8
8-Bit Mode ......................................................................... 8-9
16-Bit Mode ....................................................................... 8-9
Comparison of 16-Bit and 8-Bit SRAM Modes ...................... 8-11
Parallel Port Interrupt ................................................................. 8-12
Parallel Port Throughput ............................................................. 8-12
8-Bit Access ........................................................................... 8-14
16-Bit Access ......................................................................... 8-14
Conclusion ............................................................................ 8-15
Parallel Port Registers .................................................................. 8-15
Parallel Port DMA Registers ................................................... 8-16
Parallel Port External Setup Registers ..................................... 8-17
ADSP-2126x SHARC Processor Hardware Reference
Contents
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