Freescale Semiconductor, Inc.
GENERAL RELEASE SPECIFICATION
SECTION 1
GENERAL DESCRIPTION
The MC68HC05P4A is a 28-pin device based on the MC68HC05P4. The memory
map includes 4160 bytes of user ROM and 176 bytes of RAM. The MCU has two
8-bit input/output (I/O) ports, A and C. Port B has three I/O pins and port D has
two pins, one that is I/O and the other input only. The MC68HC05P4A includes a
simple serial I/O peripheral (SIOP) and an on-chip mask programmable computer
operating properly (COP) watchdog circuit.
1.1
Features
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Low Cost
HC05 Core
28-Pin Package
On-Chip Oscillator with RC or Crystal/Ceramic Resonator Mask Options
4160 Bytes of User ROM Including 16 User Vector Locations
ROM Security Feature
176 Bytes of On-Chip RAM
16-Bit Timer
Rev. 2.0
1-1
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