ADSP-214xx SHARC Processor Hardware Reference 9-1
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.
Table 9-1. Routing Unit Specifications
Feature DAI DPI
Pin Buffers
Number 20 14
Input Yes Yes
Output Yes Yes
Open-drain Yes Yes
Three-state Yes Yes
High Impedance Yes Yes
Programmable Pull-up No No
I/O Level Status Register Yes Yes
Interrupts
Interrupt Control Yes Yes
To Next Page
Loading...
Need help?
General
