The Parallel Peripheral Interface (PPI) is a peripheral found on the
Blackfin
The Blackfin is a family of 16-/32-bit microprocessors developed, manufactured and marketed by Analog Devices. The processors have built-in, fixed-point digital signal processor (DSP) functionality supplied by 16-bit multiply–accumulates (MA ...
embedded processor. The PPI is a
half-duplex,
bi-directional port that is designed to connect directly to
LCD
A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers. Liquid crystals do not emit light directly but in ...
s,
CMOS sensor
An active-pixel sensor (APS) is an image sensor where each pixel sensor unit cell has a photodetector (typically a pinned photodiode) and one or more active transistors. In a metal–oxide–semiconductor (MOS) active-pixel sensor, MOS field-effec ...
s,
CCDs, video encoders (video
DACs), video decoders (video
ADC
ADC may refer to:
Science and medicine
* ADC (gene), a human gene
* AIDS dementia complex, neurological disorder associated with HIV and AIDS
* Allyl diglycol carbonate or CR-39, a polymer
* Antibody-drug conjugate, a type of anticancer treatment ...
s) or any generic high speed, parallel device.
The width of the PPI is programmable and can be set between 8 and 16 bits in 1-bit increments. The latest Blackfin family (BF54x) also features an 18/24-bit PPI for direct connection to
RGB LCD panels.
The PPI can run from 0
MHz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that one he ...
up to 66 MHz.
The PPI has a dedicated clock pin, three multiplexed frame sync pins, and between 16 and 24 data pins.
References
http://blackfin.uclinux.org/doku.php?id=ppi
Computer peripherals
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