S i M 3 U 1 x x
36
Preliminary Rev. 0.8
With on-chip power-on reset, voltage supply monitor, watchdog timer, and clock oscillator, the SiM3U1xx devices
are truly standalone 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
peripherals and may individually shut down and gate the clocks of any or all peripherals for power savings.
The on-chip debugging interface (SWJ-DP) allows non-intrusive (uses no on-chip resources), full speed, in-circuit
debugging using the production MCU installed in the final application. This debug logic supports inspection and
modification of memory and registers, setting breakpoints, single stepping, and run and halt commands. All analog
and digital peripherals are fully functional while debugging.
Each device is specified for 1.8 to 3.6 V operation over the industrial temperature range (–40 to +85 °C). The Port
I/O and RESET pins are powered from the IO supply voltage. The SiM3U1xx devices are available in 40-pin or 64-
pin QFN, 64-pin or 80-pin TQFP, or 92-pin LGA packages. All package options are lead-free and RoHS compliant.
See Table 6.1 for ordering information. A block diagram is included in Figure 4.1.
Figure 4.1. Precision32™ SiM3U1xx Family Block Diagram
USB0
2 kB Buffer
5 Bidirectional
Endpoints
Internal Oscillator
I/O
EMIF
Standard I/O pins
Crossbars
5 V tolerant pins
High Drive pins
Digital
USART0
USART1
UART0
UART1
I2C0
I2C1
I2S0
AES0
CRC0
SPI2
SPI1
SPI0
PCA1
PCA0
EPCA0
Timer 0
Timer 1
Low Power Timer (LPTIMER0)
Voltage Supply
Monitor (VMON0)
Watchdog
Timer
(WDTIMER0)
ARM Cortex M3
Core
Debug /
Programming
Hardware
DMA
16-Channel Controller
Peripheral Crossbar
Power On Reset /
PMU
AH
B
APB
Analog
Comparator 0
Comparator 1
IDAC0
IDAC1
SARADC0
IVC0
Capacitive Sensing 0
SARADC1
Power
Low Dropout Regulator (LDO0)
Voltage Regulator (VREG0)
External Regulator (EXTVREG0)
Power Management Unit (PMU)
Memory
32/64/128/256 kB Flash
4/12/28 kB RAM
4 kB retention RAM
DMA access available for these peripherals
Clock Control
Clocking
USB Oscillator (USB0OSC)
External Oscillator Control (EXTOSC0)
Phase-Locked Loop (PLL0OSC)
Peripheral Clock Control (CLKCTRL)
Low Frequency Oscillator (LFOSC0)
Low Power Oscillator (LPOSC0)
Real-Time Clock (RTC0OSC)