参数资料
型号: MC68HC11C0MFN2
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 2 MHz, MICROCONTROLLER, PQCC68
封装: PLASTIC, LCC-68
文件页数: 69/76页
文件大小: 394K
代理商: MC68HC11C0MFN2
MC68HC11C0
MOTOROLA
MC68HC11C0TS/D
71
11 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 MC68HC11C0 A/D converter system, a four-channel mul-
tiplexed-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 technique
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 16 A/D Converter Block Diagram
PE0/
AN0
PE1/
AN1
PE2/
AN2
PE3/
AN3
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
ADDR 3 A/D RESULT 3
RESULT REGISTER INTERFACE
RESULT
INTERNAL
DATA BUS
VRH
VRL
ADDR 4 A/D RESULT 4
ADDR 2 A/D RESULT 2
ADDR 1 A/D RESULT 1
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