The ST7263B microcontrollers form a sub-family of the ST7 MCUs dedicated to USB applications. The devices are based on an industry-standard 8-bit core and feature an enhanced instruction set. They operate at a 24 MHz or 12 MHz oscillator frequency. Under software control, the ST7263B MCUs may be placed in either Wait or Halt modes, thus reducing power consumption. The enhanced instruction set and addressing modes afford real programming potential. In addition to standard 8-bit data management, the ST7263B MCUs feature true bit manipulation, 8×8 unsigned multiplication and indirect addressing modes. The devices include an ST7 Core, up to 32Kbytes of program memory, up to 1024 bytes of RAM, 27 I/O lines and the following on-chip peripherals: USB low speed interface with 3 endpoints with programmable in/out configuration using the DMA architecture with embedded 3.3V voltage regulator and transceivers (no external components are needed).8-bit analog-to-digital converter (ADC) with 12 multiplexed analog inputs Industry standard asynchronous SCI serial interfaceWatchdog 16-bit timer featuring an external clock input, 2 Input Captures, 2 Output Compares with Pulse Generator capabilitiesFast I²C multimaster interfaceLow voltage reset (LVD) ensuring proper power-on or power-off of the deviceThe ST72F63B devices are Flash versions. They support programming in IAP mode (in-application programming) via the on-chip USB interface.
Memories 4, 8, 16 or 32 Kbytes program memory: high density Flash (HDFlash), FastROM or ROM with Read-Out and Write protection In-application programming (IAP) and in-circuit programming (ICP) 384, 512 or 1024 bytes RAM memory (128-byte stack)
Clock, reset and supply management Run, Wait, Slow and Halt CPU modes 12 or 24 MHz oscillator RAM Retention mode Optional low voltage detector (LVD)
USB (universal serial bus) Interface DMA for low speed applications compliant with USB 1.5 Mbs (version 2.0) and HID specifications (version 1.0) Integrated 3.3 V voltage regulator and transceivers Supports USB DFU class specification Suspend and Resume operations 3 endpoints with programmable Input/Output configuration
Up to 27 I/O ports Up to 8 high sink I/Os (10 mA at 1.3 V) 2 very high sink true open drain I/Os (25 mA at 1.5 V) Up to 8 lines individually programmable as interrupt inputs
1 analog peripheral 8-bit A/D converter with 8 or 12 channels
2 timers Programmable watchdog 16-bit timer with 2 Input Captures, 2 Output Compares, PWM output and clock input
2 communication Interfaces Asynchronous serial communications Interface I²C multimaster Interface up to 400 kHz
Instruction Set 63 basic instructions 17 main addressing modes 8 x 8 unsigned multiply instruction True bit manipulation
Development tools Versatile development tools (under Windows) including assembler, linker, C-compiler, archiver, source level debugger, software library, hardware emulator, programming boards and gang programmers, HID and DFU software layers
