MC68HC711E20CFN2 Freescale Semiconductor, MC68HC711E20CFN2 Datasheet - Page 55

• Manufacturer Part Number: MC68HC711E20CFN2
• Description: IC MCU 20K 2MHZ OTP 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711E20CFN2

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 2MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 38
• Program Memory Size: 20KB (20K x 8)
• Program Memory Type: OTP
• Eeprom Size: 512 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

3.6.2 Direct
3.6.3 Extended
3.6.4 Indexed
3.6.5 Inherent
M68HC11E Family — Rev. 3.2
MOTOROLA
In the direct addressing mode, the low-order byte of the operand
address is contained in a single byte following the opcode, and the
high-order byte of the address is assumed to be $00. Addresses
$00–$FF are thus accessed directly, using 2-byte instructions.
Execution time is reduced by eliminating the additional memory access
required for the high-order address byte. In most applications, this
256-byte area is reserved for frequently referenced data. In M68HC11
MCUs, the memory map can be configured for combinations of internal
registers, RAM, or external memory to occupy these addresses.
In the extended addressing mode, the effective address of the argument
is contained in two bytes following the opcode byte. These are 3-byte
instructions (or 4-byte instructions if a prebyte is required). One or two
bytes are needed for the opcode and two for the effective address.
In the indexed addressing mode, an 8-bit unsigned offset contained in
the instruction is added to the value contained in an index register (IX or
IY). The sum is the effective address. This addressing mode allows
referencing any memory location in the 64-Kbyte address space. These
are 2- to 5-byte instructions, depending on whether or not a prebyte is
required.
In the inherent addressing mode, all the information necessary to
execute the instruction is contained in the opcode. Operations that use
only the index registers or accumulators, as well as control instructions
with no arguments, are included in this addressing mode. These are
1- or 2-byte instructions.
Central Processor Unit (CPU)
Central Processor Unit (CPU)
Addressing Modes
Technical Data
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