This is information on a product in full production.
April 2014
DocID025832 Rev 2
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STM32F042x
ARM
®
-based 32-bit MCU, up to 32 KB Flash, crystal-less USB
FS 2.0, CAN, 8 timers, ADC & comm. interfaces, 2.0 - 3.6 V
Datasheet
-
production data
Features
Core: ARM
32-bit Cortex
-M0 CPU,
frequency up to 48 MHz
Memories
– 16 to 32 Kbytes of Flash memory
– 6 Kbytes of SRAM with HW parity
CRC calculation unit
Reset and power management
– Digital and I/Os supply: V
DD
= 2
V to 3.6
V
– Analog supply: V
DDA
= V
DD
to 3.6
V
– Selected I/Os: V
DDIO2
= 1.65
V to 3.6
V
– Power-on/Power down reset (POR/PDR)
– Programmable voltage detector (PVD)
– Low power modes: Sleep, Stop, Standby
– V
BAT
supply for RTC and backup registers
Clock management
– 4 to 32 MHz crystal oscillator
– 32 kHz oscillator for RTC with calibration
– Internal 8 MHz RC with x6 PLL option
– Internal 40 kHz RC oscillator
– Internal 48 MHz oscillator with automatic
trimming based on
ext. synchronization
Up to 37 fast I/Os
– All mappable on external interrupt vectors
– Up to 37 I/Os with 5
V tolerant capability
and 8 with independent supply V
DDIO2
5-channel DMA controller
One 12-bit, 1.0
μ
s ADC (up to 10 channels)
– Conversion range: 0 to 3.6 V
– Separate analog supply: 2.4
V to 3.6
V
Up to 14 capacitive sensing channels for
touchkey, linear and rotary touch sensors
Calendar RTC with alarm and periodic wakeup
from Stop/Standby
Nine timers
– One 16-bit advanced-control timer for six
channel PWM output
– One 32-bit and four 16-bit timers, with up to
four IC/OC, OCN, usable for IR control
decoding
– Independent and system watchdog timers
– SysTick timer
Communication interfaces
– One I
2
C interface supporting Fast Mode
Plus (1 Mbit/s) with 20 mA current sink,
SMBus/PMBus and wakeup
– Two USARTs supporting master
synchronous SPI and modem control; one
with ISO7816 interface, LIN, IrDA, auto
baud rate detection and wakeup feature
– Two SPIs (18 Mbit/s) with four to 16
programmable bit frames, one with I
2
S
interface multiplexed
– CAN interface
– USB 2.0 full-speed interface, able to run
from internal 48 MHz oscillator and with
BCD and LPM support
HDMI CEC, wakeup on header reception
Serial wire debug (SWD)
96-bit unique ID
All packages ECOPACK
2
Table 1. Device summary
Reference
Part number
STM32F042xx
STM32F042F4, STM32F042G4,
STM32F042K4, STM32F042T4,
STM32F042C4
STM32F042F6, STM32F042G6,
STM32F042K6, STM32F042T6,
STM32F042C6
LQFP48 7x7
UFQFPN48 7x7
WLCSP36
UFQFPN32 5x5
UFQFPN28 4x4
TSSOP20
LQFP32 5x5
