SiM3C1xx
4. Precision32™ SiM3C1xx System Overview
The SiM3C1xx Precision32™ devices are fully integrated, mixed-signal system-on-a-chip MCUs. Highlighted
features are listed below. Refer to Table 6.1 for specific product feature selection and part ordering numbers.
Core:
ARM Cortex-M3 CPU.
80 MHz maximum operating frequency.
Branch target cache and prefetch buffers to minimize wait states.
Memory:
32-bit
32–256 kB Flash; in-system programmable, 8–32 kB SRAM (including 4 kB retention SRAM,
which preserves state in PM9 mode).
Power:
Low
drop-out (LDO) regulator for CPU core voltage.
Power-on reset circuit and brownout detectors.
3.3 V output LDO for direct power from 5 V supplies.
External transistor regulator.
Power Management Unit (PMU).
I/O:
Up to 65 total multifunction I/O pins:
Up
to six programmable high-power capable (5–300 mA, 1.8–5 V).
Up to twelve 5 V tolerant general purpose pins.
Two flexible peripheral crossbars for peripheral routing.
Clock
Sources:
oscillator with PLL: 23
–
80 MHz with ± 1.5% accuracy in free-running mode.
Low-power internal oscillator: 20 MHz and 2.5 MHz modes.
Low-frequency internal oscillator: 16.4 kHz.
External RTC crystal oscillator: 32.768 kHz.
External oscillator: Crystal, RC, C, CMOS clock modes.
Programmable clock divider allows any oscillator source to be divided by binary factor from 1-128.
Internal
Data
Peripherals:
DMA Controller.
128/192/256-bit Hardware AES Encryption.
16/32-bit CRC.
Timers/Counters
6-channel
16-Channel
and PWM:
Enhanced Programmable Counter Array (EPCAn) supporting advanced PWM and capture/compare.
2 x 2-channel Standard Programmable Counter Array (PCAn) supporting PWM and capture/compare.
2 x 32-bit Timers - can be split into 4 x 16-bit Timers, support PWM and capture/compare.
Real Time Clock (RTCn).
Low Power Timer.
Watchdog Timer.
Communications
External
Peripherals:
Memory Interface.
2 x USARTs and 2 x UARTs with IrDA and ISO7816 SmartCard support.
3 x SPIs.
2 x I2C.
I
2
S
(receive and transmit).
Analog:
x 12-Bit Analog-to-Digital Converters (SARADC).
2 x 10-Bit Digital-to-Analog Converter (IDAC).
16-Channel Capacitance-to-Digital Converter (CAPSENSE).
2 x Low-Current Comparators (CMP).
1 x Current-to-Voltage Converter (IVC) module with two channels.
2
Debugging
With on-chip power-on reset, voltage supply monitor, watchdog timer, and clock oscillator, the SiM3C1xx devices
are truly standalone system-on-a-chip solutions. The Flash memory is reprogrammable in-circuit, providing non-
On-Chip
Preliminary Rev. 0.8
31
SILABS [ SILICON LABORATORIES ]
