參數(shù)資料
型號(hào)： MC68HC11EA9VFN3
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PQCC52
封裝： PLASTIC, LCC-52
文件頁(yè)數(shù)： 50/58頁(yè)
文件大?。?/td> 583K
代理商： MC68HC11EA9VFN3
MOTOROLA
MC68HC11EA9
54
MC68HC11EA9TS/D
9 Analog-to-Digital Converter
The analog-to-digital (A/D) converter system uses an all-capacitive charge-redistribution technique to
convert analog signals to digital values. The MC68HC(7)11EA9 A/D converter system, a four-channel
multiplexed-input successive-approximation converter, is accurate to
±1 least significant bit (LSB). It
does not require external sample and hold circuits because of the type of charge-redistribution tech-
nique used.
Dedicated pins VRH and VRL provide the reference supply voltage inputs.
A multiplexer allows the single A/D converter to select one of 16 analog signals.
Figure 14 A/D Block Diagram
EA9 A/D BLOCK
PE0
AN0
PE1
AN1
PE2
AN2
PE3
AN3
PE4
AN4
PE5
AN5
PE6
AN6
PE7
AN7
ANALOG
MUX
8-BIT CAPACITIVE DAC
WITH SAMPLE AND HOLD
SUCCESSIVE APPROXIMATION
REGISTER AND CONTROL
ADCTL A/D CONTROL
CB
CC
CD
MULT
SCAN
CCF
CA
ADR1 A/D RESULT 1
ADR2 A/D RESULT 2
ADR3 A/D RESULT 3
ADR4 A/D RESULT 4
RESULT REGISTER INTERFACE
RESULT
INTERNAL
DATA BUS
VRH
VRL
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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