MC68HC811E2FN Freescale Semiconductor, MC68HC811E2FN Datasheet - Page 21
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MC68HC811E2FN
Manufacturer Part Number
MC68HC811E2FN
Description
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68HC811E2FN.pdf
(242 pages)
Specifications of MC68HC811E2FN
Cpu Family
HC11
Device Core Size
8b
Frequency (max)
4MHz
Interface Type
SCI/SPI
Program Memory Type
ROMLess
Program Memory Size
Not Required
Total Internal Ram Size
256Byte
# I/os (max)
38
Number Of Timers - General Purpose
8
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
3V
On-chip Adc
8-chx8-bit
Instruction Set Architecture
CISC
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
52
Package Type
PLCC
Lead Free Status / Rohs Status
Supplier Unconfirmed
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1.4.1 V
Power is supplied to the MCU through V
operates from a single 5-volt (nominal) power supply. Low-voltage devices in the E series operate at
3.0–5.5 volts.
Very fast signal transitions occur on the MCU pins. The short rise and fall times place high, short duration
current demands on the power supply. To prevent noise problems, provide good power supply bypassing
at the MCU. Also, use bypass capacitors that have good
high-frequency characteristics and situate them as close to the MCU as possible. Bypass requirements
vary, depending on how heavily the MCU pins are loaded.
Freescale Semiconductor
DD
and V
OPTIONAL POWER-ON DELAY AND MANUAL RESET SWITCH
RESET SWITCH
MANUAL
SS
4.7 kΩ
Figure 1-8. External Reset Circuit with Delay
V DD
Figure 1-7. External Reset Circuit
M68HC11E Family Data Sheet, Rev. 5.1
4.7 k Ω
1.0 µF
MC34(0/1)64
GND
V DD
IN
DD
2
3
RESET
and V
MC34164
GND
IN
1
RESET
SS
V DD
. V
4.7 kΩ
DD
is the power supply, V
MC34064
TO RESET
OF M68HC11
GND
V DD
IN
RESET
V DD
4.7 kΩ
SS
is ground. The MCU
TO RESET
OF M68HC11
Pin Descriptions
21
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