STR711FR0 STMicroelectronics, STR711FR0 Datasheet - Page 8

• Manufacturer Part Number: STR711FR0
• Description: ARM-Based Flash microcontrollers with USB
• Manufacturer: STMicroelectronics

Specifications of STR711FR0

• 5 Power Saving Modes: SLOW, WAIT, LPWAIT, STOP and STANDBY modes
• Conversion Range: 0 to 2.5 V

System architecture
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Realtime clock (RTC)
The RTC provides a set of continuously running counters driven by the 32 kHz external
crystal. The RTC can be used as a general timebase or clock/calendar/alarm function.
When the STR71x is in Standby mode the RTC can be kept running, powered by the low
power voltage regulator and driven by the 32 kHz external crystal.
UARTs
The 4 UARTs allow full duplex, asynchronous, communications with external devices with
independently programmable TX and RX baud rates up to 1.25 Mb/s.
Smartcard interface
UART1 is configurable to function either as a general purpose UART or as an asynchronous
Smartcard interface as defined by ISO 7816-3. It includes Smartcard clock generation and
provides support features for synchronous cards.
Buffered serial peripheral interfaces (BSPI)
Each of the two SPIs allow full duplex, synchronous communications with external devices,
master or slave communication at up to 5.5 Mb/s in Master mode and 4 Mb/s in Slave mode.
I
The two I
I
One I
be used at a time.
HDLC interface
The High Level Data Link Controller (HDLC) unit supports full duplex operation and NRZ,
NRZI, FM0 or MANCHESTER protocols. It has an internal 8-bit baud rate generator.
A/D converter
The Analog to Digital Converter, converts in single channel or up to 4 channels in single-
shot or round robin mode. Resolution is 12-bit with a sampling frequency of up to 1 kHz. The
input voltage range is 0-2.5V.
Watchdog
The 16-bit Watchdog Timer protects the application against hardware or software failures
and ensures recovery by generating a reset.
I/O ports
The 48 I/O ports are programmable as Inputs or Outputs.
External interrupts
Up to 14 external interrupts are available for application use or to wake up the application
from STOP mode.
2
2
C interfaces
C mode (400 kHz) and 7 or 10-bit addressing modes.
2
C Interface is multiplexed with one SPI, so either 2xSPI+1x I
2
C Interfaces provide multi-master and slave functions, support normal and fast
2
C or 1xSPI+2x I
STR71xF
2
C may