1.1. S3F8S45 Microcontroller

The S3F8S45 MCU features 16 KB of Flash ROM. Using a proven modular design

approach, the S3F8S45 MCU was developed by integrating the following peripheral modules with the SAM88 core:

• Five programmable I/O ports, including three 8-bit ports and two 7-bit ports for a total

of 38 pins

• Eight bit-programmable pins for external interrupts

• One 8-bit basic timer for oscillation stabilization and watchdog functions (system reset)

• Three 8-bit timer/counters and two 16-bit timer/counters with selectable operating modes

• Watch timer for real time

• LCD controller/driver

• A/D converter with 9 selectable input pins

• Synchronous SIO modules

• Two asynchronous UART modules

• Pattern generation module

• Battery level detector

The S3F8S45 MCU is currently available in 44-pin QFP, 42-pin SDIP, and 32-pin SDIP

packages.

Features

The S3F8S45 MCU offers the following features:

• SAM88 RC CPU core

• Program memory (full Flash ROM):

– 16K x 8 bits program memory

– Internal Flash (program) memory

○ Sector size: 128 bytes

○ 10 years data retention

○ Fast programming time; user program and sector erase available

○ Endurance: 10,000 erase/program cycles

○ External serial programming support

○ Expandable On-Board Program (OBP) sector

• Data memory (RAM)

– LCD display data memory

– 528 x 8 bits data memory

• Instruction set

– 78 instructions

– IDLE and STOP instructions added for power-down modes

• 38 I/O pins

– 8 pins shared with other signal pins

– 30 pins shared with LCD signal outputs

• Interrupts

– 8 interrupt levels and 22 interrupt sources

– Fast interrupt processing feature

• 8-bit basic timer

– Watchdog timer function

• 2 watchdog timer clock sources:

– Basic timer

– 32 kHz internal RC oscillator, selectable by the Smart Option

• 8-bit Timer/Counter A:

– Programmable 8-bit internal timer

– External event counter function

– PWM and capture function