AS8267 datasheet(91/136 Pages) AMSCO

91 / 136 page

Data Sheet AS8267 / AS8268

Revision 1.0, 19-Jun-07

Page 91 of 136

SPI.................. serial peripheral interface, used to access an external EEPROM

LCDD .............. LCD driver block

RTC ................ real time clock, time/data may be set via UART1 (SCT)

MPIO............... multi-purpose I/O pins, configurable inputs and outputs

DSP ................ digital signal processing unit interfaces to analog front end (AFE)

AFE................. analog front end, includes amplifiers and A to D converters

SCT ................ system control unit, combined with UART1 used for debugging/programming of the device

Key Features

8051 compatible 8 bit oriented microcontroller core

128 bytes of internal data memory (I_RAM)

32kB Flash memory

1kB data memory (X_RAM)

Von Neumann architecture, shared program and data memory

Cycle optimized compared to standard 8051, some instructions are executed in a single clock cycle

128 bytes of SFR range

Standard SFRs: Timer 0, UART1 (with 16 baudrate reg.)

Specific SFRs: UART2 (with 16 bit baudrate reg.), SQRT block

Fully compatible 8051 instruction set including DA, MUL and DIV instruction

7 internal interrupt sources

Ports P0, P1, P2, P3 are not implemented

P0 and P2 are accessible as registers

No idle mode via PCON

Automatic bootload of application program after power-on reset

6 clock cycles per instruction (12 cycles in standard 8051)

1 data pointer DPTR

AS8267 Datasheet(PDF) 91 Page - ams AG