MC68HC05SU3A Datasheet, PDF (15/80 Pages) Freescale Semiconductor, Inc – Fully static chip design featuring the industry standard 8-bit M68HC05 core

Freescale Semiconductor, Inc.
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GENERAL DESCRIPTION
The MC68HC05SU3A HCMOS microcontroller is a member of the M68HC05 family of low-cost
single-chip microcontrollers. This 8-bit microcontroller unit (MCU) contains on-chip oscillator,
CPU, RAM, ROM, I/O, and Timer. The MC68HC05SU3A is pin compatible with the MC6805U3
and is provided as a low power upgrade path for MC6805U3 applications. The low power
advantage of CMOS is combined with the addition of I/O and port modifications which help
eliminate external components in cost sensitive applications.
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Features
• Fully static chip design featuring the industry standard 8-bit M68HC05 core
• Pin compatible with the MC6805U3
• Power saving STOP, WAIT, and SLOW modes
• 3840 bytes of user ROM with security feature
• 192 bytes of user RAM (64 bytes for stack)
• 32 bidirectional I/O lines
• Keyboard interrupts
• 8-bit count-down timer with programmable 7-bit prescaler
• On-chip crystal oscillator, with built-in capacitor for RC option
• Second software programmable external interrupt line (IRQ2)
• Direct LED drive capability on all ports
• Programmable 20KΩ pull-up resistors integrated into I/O ports
(1.9KΩ pull-up resistors integrated into PB0 and PB1)
• Internal 60KΩ pull-up resistor on RESET pin
• Internal 100KΩ pull-up resistor on IRQ pin
• Low Voltage Reset
• Available in 40-pin PDIP, 42-pin SDIP and 44-pin QFP packages
MC68HC05SU3A
GENERAL DESCRIPTION
For More Information On This Product,
Go to: www.freescale.com
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