ST7GEME4

Introduction

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Introduction

The ST7GEME4 device is a member of the ST7 microcontroller family designed for USB

applications. All devices are based on a common industry-standard 8-bit core, featuring an

enhanced instruction set.

The ST7GEME4 is factory-programmed ROM devices and as such are not

reprogrammable.

It operates at a 4 MHz external oscillator frequency.

Under software control, all devices can be placed in Halt mode, reducing power

consumption when the application is in idle or stand-by state.

The enhanced instruction set and addressing modes of the ST7 offer both power and

flexibility to software developers, enabling the design of highly efficient and compact

application code. In addition to standard 8-bit data management, all ST7 microcontrollers

feature true bit manipulation, 8x8 unsigned multiplication and indirect addressing modes.

The ST7GEME4 includes an ST7 Core, up to 16 Kbytes of program memory, up to 512

bytes of user RAM and the following on-chip peripherals:

●

USB full speed interface with 7 endpoints, programmable in/out configuration and

embedded 3.3 V voltage regulator and transceivers (no external components are

needed).

●

ISO 7816-3 UART interface with programmable baud rate from 372 clock pulses up to

11.625 clock pulses

●

Smartcard supply block able to provide programmable supply voltage and I/O voltage

levels to the smartcards

●

Low voltage reset ensuring proper power-on or power-off of the device (selectable by

option)

●

8-bit timer (TBU)