The MC68HC05E6 is a member of the M68HC05 family of HCMOS
microcomputers. Features of the MC68HC05E6 include 6K bytes of user
ROM, 160 bytes of EEPROM, a keyboard interface, an A/D converter and
a 16-bit timer. The device is further enhanced by a core timer which
enables real time interrupts at, for example, 8ms intervals and a
watchdog facility which guards against CPU 'runaway'. The on-board
EEPROM facilitates storage of alterable, non-volatile, user specified
data, such as personalisation data or control parameters. The features
highlighted make the part ideally suited to various control applications,
while the low voltage design and low cost option ensure that it can also
be used in telecommunications applications such as telephone handsets.
For maximum I/O capability, the 44-pin version of the MC68HC05E6 is
recommended, however for cost-sensitive applications a 28-pin version
is also available.

The MC68HC705E6 is an EPROM version of the MC68HC05E6, with
the user ROM replaced by a similar amount of EPROM. All references
to the MC68HC05E6 apply equally to the MC68HC705E6, unless
otherwise noted.
 

Features
* Fully static design featuring the industry-standard M68HC05 core
* On-chip oscillator with crystal or ceramic resonator clock options
* 6000 bytes of user ROM
plus 16 bytes of user vectors
(MC68HC05E6);
6144 bytes of user EPROM plus 16 bytes of user
vectors (MC68HC705E6)
* 240 bytes of bootloader ROM (MC68HC705E6)
* 160 bytes of EEPROM
* 128 bytes of RAM
* Single supply voltage (no external voltage required for EEPROM
programming)
* 4-channel, 8-bit A/D converter
* 16-bit programmable timer with input capture and output compare
* 15-stage multipurpose core timer with overflow, watchdog and
real-time interrupt
* 32 programmable bidirectional I/O lines and four input-only lines
including eight fixed wire pull-ups (port A), eight fixed wire
pull-downs (port B) and 16 software selectable pull-ups (ports C
and D)
* Keyboard interrupt facility available on all pins of port C
* Low voltage indicator (LVI)
* Power saving STOP and WAIT modes
* Available in 44-pin QFP and 28-pin SOIC packages;