DRA790 Datasheet, PDF (296/436 Pages) Texas Instruments – Infotainment Applications Processor

DRA790, DRA791
DRA793, DRA797
SPRS968A – AUGUST 2016 – REVISED FEBRUARY 2017
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5.9.6.23 PRU-ICSS
The device Programmable Real-Time Unit Subsystem and Industrial Communication Subsystem (PRU-
ICSS) consists of dual 32-bit Load / Store RISC CPU cores - Programmable Real-Time Units (PRU0 and
PRU1), shared, data, and instruction memories, internal peripheral modules, and an interrupt controller
(PRU-ICSS_INTC). The programmable nature of the PRUs, along with their access to pins, events and all
SoC resources, provides flexibility in implementing fast real-time responses, specialized data handling
operations, customer peripheral interfaces, and in off-loading tasks from the other processor cores of the
system-on-chip (SoC).
The each PRU-ICSS includes the following main features:
• 21x Enhanced GPIs (EGPIs) and 21x Enhanced GPOs (EGPOs) with asynchronous capture and serial
support per each PRU CPU core
• One Ethernet MII_RT module (PRU-ICSS_MII_RT) with two MII ports and configurable connections to
PRUs
• 1 MDIO Port (PRU-ICSS_MII_MDIO)
• One Industrial Ethernet Peripheral (IEP) to manage/generate Industrial Ethernet functions
• 1 x 16550-compatible UART with a dedicated 192 MHz clock to support 12Mbps Profibus
• 1 Industrial Ethernet timer with 7/9 capture and 8 compare events
• 1 Enhanced Capture Module (ECAP)
• 1 Interrupt Controller (PRU-ICSS_INTC)
• A flexible power management support
• Integrated switched central resource with programmable priority
• Parity control supported by all memories
CAUTION
The I/O timings provided in this section are valid only if signals within a single
IOSET are used. The IOSETs are defined in the Table 5-181 and Table 5-182.
NOTE
For more information about PRU-ICSS subsystems interfaces, please see the device TRM.
NOTE
To configure the desired virtual mode the user must set MODESELECT bit and
DELAYMODE bitfield for each corresponding pad control register.
The pad control registers are presented in Table 4-32 and described in Device TRM, Control
Module Chapter.
5.9.6.23.1 Programmable Real-Time Unit (PRU-ICSS PRU)
5.9.6.23.1.1 PRU-ICSS PRU Direct Input/Output Mode Electrical Data and Timing
Table 5-159. PRU-ICSS PRU Timing Requirements - Direct Input Mode
NO.
1
2
PARAMETER
t_w(GPI)
t_sk(GPI)
DESCRIPTION
Pulse width, GPI
Skew between GPI[20:0] signals
MIN
2 × P ⁽¹⁾
MAX
4.5
UNIT
ns
ns
296 Specifications
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