mc68hc11f1cpu3 Freescale Semiconductor, Inc, mc68hc11f1cpu3 Datasheet - Page 126
mc68hc11f1cpu3
Manufacturer Part Number
mc68hc11f1cpu3
Description
Mc68hc11f1 Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC11F1CPU3.pdf
(158 pages)
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10-2
Port E pins can also be used as digital inputs. Reads of port E pins are not recom-
mended during the sample portion of an A/D conversion cycle, when the gate signal
to the N-channel input gate is on. Because no P-channel devices are directly connect-
ed to either input pins or reference voltage pins, voltages above V
latchup problem, although current should be limited according to maximum ratings.
Refer to Figure 10-2, which is a functional diagram of an input pin.
PE0/
PE1/
PE2/
PE3/
PE4/
PE5/
PE6/
PE7/
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
ANALOG
ADDR 1 A/D RESULT 1
MUX
Figure 10-1 A/D Converter Block Diagram
Freescale Semiconductor, Inc.
RESULT
For More Information On This Product,
ANALOG-TO-DIGITAL CONVERTER
ADDR 2 A/D RESULT 2
SUCCESSIVE APPROXIMATION
REGISTER AND CONTROL
WITH SAMPLE AND HOLD
8-BIT CAPACITIVE DAC
Go to: www.freescale.com
RESULT REGISTER INTERFACE
ADDR 3 A/D RESULT 3
ADCTL A/D CONTROL
ADDR 4 A/D RESULT 4
DD
TECHNICAL DATA
do not cause a
V
V
RH
RL
MC68HC11F1
DATA BUS
INTERNAL
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