ST9040 datasheet(35/56 Pages) STMICROELECTRONICS

35 / 56 page

ST90E40

ST90T40

16K EPROM HCMOS MCU

WITH EEPROM, RAM AND A/D CONVERTER

(Ordering Information at the end of the Datasheet)

PQFP80

PLCC68

RUN, WFI and HALT modes

Minimum instruction cycle time: 500ns

(12MHz internal)

Internal Memory :

EPROM

16Kbytes

RAM

256 bytes

EEPROM

512 bytes

224 general purpose registers available as

RAM, accumulators or index pointers

(Register File)

80-pin Plastic Quad Flat Pack package for

ST90T40Q

68-lead Plastic Leaded Chip Carrier package for

ST90T40C

80-pin Windowed Ceramic Quad Flat Pack

package for ST90E40G

68-lead Windowed Ceramic LeadedChip Carrier

package for ST90E40L

DMA controller, Interrupt handler and Serial Pe-

ripheral Interface as standard features

56 fully programmable I/O pins

Up to 8 external plus 1 non-maskableinterrupts

16 bit Timer with 8 bit Prescaler, able to be used

as a Watchdog Timer

Two 16 bit Multifunction Timers, each with an 8

bit prescaler and 13 operating modes

8 channel 8 bit Analog to Digital Converter, with

Analog Watchdogs and external references

Serial Communications Interface with asynchro-

nous and synchronous capability

Rich Instruction Set and 14 Addressingmodes

Division-by-Zero trap generation

Versatile Development tools,including assembler,

linker, C-compiler, archiver, graphic oriented de-

buggerand hardware emulators

Real Time Operating System

Compatible with ST9036 and ST9040 16K ROM

devices

CQFP80W

March 1994

CLCC68W

35/56

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