Texas Instruments OMAP5912 Reference Manual page 32

OMAP5912 Description
DES_3DES Accelerator
Random Number Generator
Camera Interface
Real-Time Counter
OS Timer
32 Introduction
The DES_3DES
encryption/decryption functions. It can run either the single DES algorithm or
the triple DES algorithm in compliance with the FIPS 46−3 standard. It
supports the electronic codebook (ECB) and cipher block chaining (CBC)
modes of operation. It does not support the cipher feedback (CFB) or the
output feedback (OFB) modes of operation in hardware.
The random number generator (RNG) module provides a true,
nondeterministic noise source to generate keys, initialization vectors (IVs) and
other random number requirements. It is designed for FIPS 140-1 compliance,
facilitating system certification to this security standard. An ANSI X9.17, annex
C postprocessor is available to meet the NIST requirements of FIPS 140-1.
The camera interface supports 8-bit parallel image data port and
horizontal/vertical signal ports separately (stand alone synchronization
method).
The real-time counter (RTC) block is an embedded real-time counter module,
directly accessible from the MPU.
Basic functionalities of the RTC block are:
-
Time information (seconds/minutes/hours) directly in BCD code
-
Calendar information (day/month/year/day of the week) directly in BCD
code, up to year 2099
-
Interrupt generation, periodically (1s/1m/1h/1d period) or at a precise time
of the day (alarm function)
-
30-s time correction: oscillator frequency calibration using reference clock
input
-
Can be used in standalone when rest of the chip is powered down
A programmable interval timer is required to generate a periodic interrupt, also
called a system clock tick, to the OS. This is used to keep track of the current
time and to control the operation of device drivers.
module provides hardware-accelerated
SPRU748A
data