Parallel Peripheral Interface (Ppi); Rotary Encoder Interface - Analog Devices ADSP-BF518F EZ-Board Manual

By default, the EZ-Board boots from the 16-bit flash parallel memory.
Internal or external SPI flash can be selected as the boot source by setting
the boot mode select switch (
Switch (SW1)" on page

Parallel Peripheral Interface (PPI)

The ADSP-BF518F processor provides a parallel peripheral interface
(PPI), supporting data widths up to 16 bits. The PPI interface provides
three multiplexed frame syncs, a multiplexed clock, and 16 multiplexed
data lines. The full PPI port is accessible on the expansion interface II
connector ( ). See
P3
page 2-24.
The PPI signals connect to multi-functional pins. The PPI is shared with
the on-board codec, eMMC interface, SD interface, and Ethernet IC. To
use the PPI on the expansion interface, disable the codec by turning
switch to all
SW15
page 2-12). The eMMC interface is disabled by turning switches
to all , and the SPI flash is disabled by removing the jumper from
SW21 OFF
. See "eMMC Enable Switch (SW20–21)" on page 2-13
JP16
FLASH CS Enable Jumper (JP16)" on page 2-16
The PPI is not used on the EZ-Board, the PPI is intended for use on the
expansion interface II.

Rotary Encoder Interface

The ADSP-BF518F processor has a built-in, up-down counter with sup-
port for a rotary encoder. The three-wire rotary encoder interface connects
to the thumbwheel rotary switch (
rotary encoder can be turned clockwise for the up function, counter
ADSP-BF518F EZ-Board Evaluation System Manual
Using the ADSP-BF518F EZ-Board
) to position 3. See
SW1
2-8.
"Expansion Interface II Connector (P3)" on
(see "SPORT0 ENBL Switch (SW15)" on
OFF
SW19
"Boot Mode Select
for more information.
) and expansion interface II. The
and
SW20
and "SPI
1-19