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Introduction
STR73xF
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1.2
On-Chip Peripherals
CAN Interfaces
The three CAN modules are compliant with the CAN specification V2.0 part B (active). The
bit rate can be programmed up to 1 MBaud. These are not available in the STR735 and
STR736.
DMA
4 DMA controllers, each with 4 data streams manage memory to memory, peripheral to
peripheral, peripheral to memory and memory to peripheral transfers. The DMA requests
are connected to TIM timers, BSPI0, BSPI1, BSPI2 and ADC. One of the streams can be
configured to be triggered by a software request, independently from any peripheral activity.
16-bit Timers (TIM)
Each of the ten timers (six in 100-pin devices) have a 16-bit free-running counter with 7-bit
prescaler, up to two input capture/output compare functions, a pulse counter function, and a
PWM channel with selectable frequency. This provides a total of 16 independent PWMs (12
in 100-pin devices) when added with the PWM modules (see next paragraph).
PWM Modules (PWM)
The six 16-bit PWM modules have independently programmable periods and duty-cycles,
with 5+3 bit prescaler factor.
Timebase Timers (TB)
The three 16-bit Timebase Timers with 8-bit prescaler for general purpose time triggering
operations.
Realtime Clock (RTC)
The RTC provides a set of continuously running counters driven by separate clock signal
derived from the main oscillator. The RTC can be used as a general timebase or
clock/calendar/alarm function. When the STR73xF is in LPWFI mode the RTC keeps
running, powered by the low power voltage regulator.
UARTs
The 4 UARTs allow full duplex, asynchronous, communications with external devices with
independently programmable TX and RX baud rates up to 625K baud.
Buffered Serial Peripheral Interfaces (BSPI)
Each of the three BSPIs allow full duplex, synchronous communications with external
devices, master or slave communication at up 6 Mb/s (@36 MHz System Clock).
I2C Interfaces
The two I2C Interfaces provide multi-master and slave functions, support normal and fast
I2C mode (400 kHz) and 7 or 10-bit addressing modes.
A/D Converter
The 10-bit Analog to Digital Converter, converts up to 16 channels in single-shot or
continuous conversion modes (12 channels in 100-pin devices). The minimum conversion
time is 3us.