Silicon Laboratories SiM3L1xx, User Manual

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S i M 3 L 1 x x
32 Rev 1.1
4. Precision32™ SiM3L1xx System Overview
The SiM3L1xx Precision32™ devices are fully integrated, mixed-signal system-on-a-chip MCUs. Highlighted
features are listed below. Refer to Table
5.1 for specific product feature selection and part ordering numbers.
 Core:

32-bit ARM Cortex-M3 CPU.

50 MHz maximum operating frequency.

Branch target cache and prefetch buffers to minimize wait states.
 Memory:
32–256 kB flash; in-system programmable, 8–32 kB SRAM configurable to retention mode in
4 kB blocks. Blocks configured to retention mode preserve state in the low power PM8 mode.
 Power:

Three adjustable low drop-out (LDO) regulators.

DC-DC buck converter allows dynamic voltage scaling for maximum efficiency (250 mW output).

Power-on reset circuit and brownout detectors.

Power Management Unit (PMU).

Specialized charge pump reduces power consumption in low power modes.

Process/Voltage/Temperature (PVT) Monitor.

Register state retention in lowest power mode.
 I/O:
Up to 62 contiguous 5 V tolerant I/O pins and one flexible peripheral crossbar.
 Clock Sources:

Internal oscillator with PLL: 23
–
50 MHz with ± 1.5% accuracy in free-running mode.

Low-power internal oscillator: 20 MHz.

Low-frequency internal oscillator: 16.4 kHz.

External RTC crystal oscillator: 32.768 kHz.

External oscillator: Crystal, RC, C, CMOS clock.
 Integrated LCD Controller (4x40).
 Data Peripherals:

10-Channel DMA Controller.

3 x Data Transfer Managers.

128/192/256-bit Hardware AES Encryption.

CRC with programmable 16-bit polynomial, one 32-bit polynomial, and bus snooping capability.

Encoder / Decoder.
 Timers/Counters:

3 x 32-bit Timers.

1 x Enhanced Programmable Counter Array (EPCA).

Real Time Clock (RTC0).

Low Power Timer.

Watchdog Timer.

Low Power Mode Advanced Capture Counter (ACCTR).
 Communications Peripherals:

1 x USART with IrDA and ISO7816 SmartCard support.

1 x UART that operates in low power mode (PM8).

2 x SPIs.

1 x I2C.
 Analog:

1 x 12-Bit Analog-to-Digital Converter (SARADC).

1 x 10-Bit Digital-to-Analog Converter (IDAC).

2 x Low-Current Comparators (CMP).
 On-Chip Debugging
With on-chip power-on reset, voltage supply monitor, watchdog timer, and clock oscillators, the SiM3L1xx devices
are truly stand-alone system-on-a-chip solutions. The flash memory is reprogrammable in-circuit, providing non-
volatile data storage and allowing field upgrades of the firmware. User firmware has complete control of all