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GENERAL DESCRIPTION

The XA-S3 device is a member of Philips Semiconductors’ XA (eXtended Architecture) family of high performance 16-bit single-chip microcontrollers.

The XA-S3 device combines many powerful peripherals on one

chip. With its high performance A/D converter, timers/counters, watchdog, Programmable Counter Array (PCA), I2C interface, dual UARTs, and multiple general purpose I/O ports, it is suited for general multipurpose high performance embedded control functions.

Specific features of the XA-S3

? 2.7 V to 5.5 V operation.

? 32 K bytes of on-chip EPROM/ROM program memory.

? 1024 bytes of on-chip data RAM.

? Supports off-chip addressing up to 16 megabytes (24 address

lines). A clock output reference is added to simplify external bus

interfacing.

? High performance 8-channel 8-bit A/D converter with automatic

channel scan and repeated read functions. Completes a

conversion in 4.46 microseconds at 30 MHz. Alternate operating

mode allows 10-bit conversion results.

? Three standard counter/timers with enhanced features. All timers

have a toggle output capability.

? Watchdog timer.

? 5-channel 16-bit Programmable Counter Array (PCA).

? I2C-bus serial I/O port with byte-oriented master and slave functions.

? Two enhanced UARTs with independent baud rates.

? Seven software interrupts.

? Active low reset output pin indicates all reset occurrences

(external reset, watchdog reset and the RESET instruction). A

reset source register allows program determination of the cause of

the most recent reset.

? 50 I/O pins, each with 4 programmable output configurations.

? 30 MHz operating frequency at 2.7–5.5 V VDD.

? Power saving operating modes: Idle and Power-down. Wake-up

from power-down via an external interrupt is supported.

? 68-pin PLCC and 80-pin PQFP packages.