AT command reference for the SIM900 GSM/GPRS module, provided as a 1.53 MB PDF. The manual lists the commands used to control calls, SMS, network registration, GPRS data…

PDF datasheet for the Atmel AT89S51, an 8051-compatible microcontroller with 4 KB of in-system programmable flash and 128 bytes of RAM.

Microchip datasheet for the dsPIC30F4013 digital signal controller, a 16-bit device combining a microcontroller with DSP capabilities, in a 5.22 MB PDF.

Summary datasheet for the ATmega406 AVR microcontroller, a 179 KB PDF. The ATmega406 is aimed at smart battery management, so this part often turns up inside laptop and…

Complete datasheet for the ATmega164, ATmega324 and ATmega644 AVR microcontrollers, a 2.66 MB PDF.

Datasheet covering the Microchip PIC18Fxx20 microcontroller family, a 7.04 MB PDF document.

Microchip PIC18C601 and PIC18C801 datasheet in a 5.62 MB PDF. These are ROMless microcontrollers designed to run from external program memory, so boards using them also…

Microchip datasheet for the PIC18Fxx8 family, the largest file in this set at 7.43 MB, where xx marks the different memory and pin-count variants.

Microchip datasheet in PDF format, 2.87 MB, for the PIC16F872 flash microcontroller, a 28-pin member of the PIC16F87x line.

Microchip datasheet for the PIC18F1220 and PIC18F1320, 18-pin PIC18 flash microcontrollers, about 5.48 MB.

Full 5.89 MB PDF datasheet for the Microchip PIC18Fxx39 group of 8-bit flash microcontrollers, a family that includes on-chip motor control features.

Full datasheet for the ATmega406 AVR microcontroller, a 1.68 MB PDF. This chip is designed for smart lithium battery packs, integrating cell balancing, voltage and…

Family manual for the Atmel AVR XMEGA D series, a 5.25 MB PDF describing the core, memories, clock system, power management, ports, timers, communication peripherals…

Datasheet for the Microchip PIC16C433, provided as a 2.43 MB PDF file. The document contains the device pinout, memory organisation, peripheral descriptions, instruction…

Datasheet for the RN-42 Bluetooth module, document version 2.32r, originally from Roving Networks and later Microchip.

Datasheet for the STMicroelectronics STM32F205RET6, an ARM Cortex-M3 microcontroller from the STM32F2 series, in a 2.22 MB PDF.

Family datasheet for the Microchip PIC16F87x microcontrollers, a 3.74 MB PDF covering the flash parts in this group such as the 28- and 40-pin variants, indicated by the…

PDF datasheet of 1.77 MB for the Microchip PIC16C712 and PIC16C716 8-bit microcontrollers.

A general PIC reference document in PDF form, 869 KB in size. The name gives only a generic book title and no specific device, author or edition, so its exact contents…

Full datasheet covering the ATmega325, ATmega3250, ATmega645 and ATmega6450 AVR microcontrollers, a 2.69 MB PDF.

Full Atmel datasheet for the AT89S8253, an 8051-compatible microcontroller with 12 KB of in-system programmable flash and 2 KB of onboard EEPROM.

Datasheet for the Atmel AT89S8252, an 8051-family microcontroller with 8 KB of downloadable flash, 2 KB of EEPROM and an SPI interface used for in-system programming.

Atmel datasheet for the AT89S53, an 8051-compatible microcontroller with 12 KB of in-system programmable flash and SPI serial programming.

Datasheet in PDF form for the IT8987E, an ITE embedded controller of the kind used in laptops to manage power-on, keyboard, battery charging and fan control.

Microchip datasheet for the PIC12F629 and PIC12F675, 8-pin flash microcontrollers, in a 4.81 MB PDF.

Datasheet for the Microchip PIC16C72, an 8-bit OTP or EPROM microcontroller with an analog-to-digital converter, supplied as a 1.13 MB PDF.

Datasheet in PDF form for the Atmel ATmega323, an older 8-bit AVR microcontroller with in-system programmable flash, EEPROM, SRAM and JTAG interface.

Instruction set reference in PDF format, 758 KB; the name alone does not specify the architecture, though it sits alongside AVR documents and most likely is the Atmel…

Family manual for the Atmel AVR XMEGA A series, a 4.96 MB PDF that explains the CPU, DMA, event system, clocks, power management, timers, USART, SPI, TWI, ADC, DAC…

PDF datasheet for the Atmel AT89C1051, the smallest member of the 20-pin 8051-compatible family, offering 1 KB of flash, 64 bytes of RAM and an analog comparator.

Microchip datasheet for the PIC16F8x devices, the classic 18-pin flash and EEPROM microcontrollers of the PIC16F83 and PIC16F84 type, in a 1.97 MB PDF.

Datasheet for the Microchip PIC16LC74B, a compact 615 KB PDF. The LC prefix indicates the low-voltage version of the PIC16C74B, with an extended supply range suited to…

Preliminary datasheet for the Atmel AT91SAM7S series of ARM7TDMI-based flash microcontrollers, a 10.5 MB PDF.

Datasheet for the Atmel AT89C1051U, a 20-pin 8051-compatible microcontroller with 1 KB of flash; the U version adds a UART and second timer compared with the basic…

Application note for C51 parts, the common shorthand for 8051-family microcontrollers, provided as a 492 KB PDF.

A 3.50 MB PDF datasheet from Microchip describing the PIC16C717, PIC16C770 and PIC16C771 microcontrollers in one shared document.

Programming specification from Microchip describing how to program the flash and data EEPROM memory of PIC16F87X microcontrollers, supplied as a 201 KB PDF.

Datasheet for the KB9022Q, an ENE Technology keyboard and embedded controller found on many notebook motherboards, in a compact 137 KB PDF.

PDF titled as a midrange reference, filed as a datasheet at 3.31 MB. The name gives no manufacturer or part number, though such titles are often used for reference…