MC68HC705X32CFU Freescale Semiconductor, MC68HC705X32CFU Datasheet - Page 43

• Manufacturer Part Number: MC68HC705X32CFU
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC705X32CFU

• Cpu Family: HC05
• Device Core Size: 8b
• Frequency (max): 4MHz
• Interface Type: SCI
• Program Memory Type: EPROM
• Program Memory Size: 32KB
• Total Internal Ram Size: 528Byte
• # I/os (max): 32
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 64
• Package Type: PQFP
• Lead Free Status / Rohs Status: Supplier Unconfirmed

The MC68HC05X16 MCU is capable of addressing 16384 bytes of memory and registers with its
program counter. The memory map includes 15118 bytes of user ROM (including user vectors),
576 bytes of bootstrap ROM, 352 bytes of RAM and 256 bytes of EEPROM.
3.1
All the I/O, control and status registers of the MC68HC05X16 are contained within the first 32-byte
block of the memory map, as shown in
bytes of memory.
The miscellaneous register is shown in
to several modules.
3.2
The user RAM comprises 176 bytes of memory, from $0050 to $00FF. This is shared with a 64 byte
stack area. The stack begins at $00FF and may extend down to $00C0. The user RAM also
comprises 176 bytes from $0250 to $02FF which is completely free for the user.
Note:
3.3
The user ROM consists of 15118 bytes of ROM mapped as follows:
•
•
MC68HC05X16
15102 bytes of user ROM from $0300 to $3DFD
16 bytes of user vectors from $3FF0 to $3FFF
Using the stack area for data storage or temporary work locations requires care to prevent
the data from being overwritten due to stacking from an interrupt or subroutine call.
Registers
RAM
ROM
Freescale Semiconductor, Inc.
MEMORY AND REGISTERS
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MEMORY AND REGISTERS
Section 3.8
Figure
3
3-1. MCAN registers are contained in the next 30
as this register contains bits which are relevant
3-1
3