Digital Application/Digital Peripheral Interfaces - Analog Devices SHARC ADSP-214 Series Hardware Reference Manual

9 DIGITAL
APPLICATION/DIGITAL
PERIPHERAL INTERFACES
The digital application interface (DAI) and the digital peripheral interface
(DPI) are comprised of a groups of peripherals and their respective signal
routing units (SRU and SRU2). The inputs and outputs of the peripherals
are not directly connected to external pins. Rather, the SRUs connect the
peripherals to a set of pins and to each other, based on a set of configura-
tion registers. This allows the peripherals to be interconnected to suit a
wide variety of systems. It also allows the SHARC processors to include an
arbitrary number and variety of peripherals while retaining high levels of
compatibility without increasing pin count.
The routing unit specifications are listed in
Table 9-1. Routing Unit Specifications
Feature
Pin Buffers
Number
Input
Output
Open-drain
Three-state
High Impedance
Programmable Pull-up
I/O Level Status Register
Interrupts
Interrupt Control
ADSP-214xx SHARC Processor Hardware Reference
www.BDTIC.com/ADI
Table
DAI
20
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
9-1.
DPI
14
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
9-1