參數(shù)資料
型號： MC68HC11KA4TS
廠商： Motorola, Inc.
英文描述： KPT 3C 3#16 PIN PLUG
中文描述： 8位微控制器
文件頁數(shù)： 48/68頁
文件大小： 365K
代理商： MC68HC11KA4TS
MOTOROLA
48
MC68HC11KA4
MC68HC11KA4TS/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 MC68HC11KA4/KA2 A/D converter system is an 8-channel
(four channels on 64-pin version), 8-bit, multiplexed-input, successive-approximation converter. It does
not require external sample and hold circuits. The sample and hold time is 12 clock cycles. Refer to
Fig-
ure 15
.
The clock source for the A/D converter's charge pump, like the clock source for the EEPROM charge
pump, is selected with the CSEL bit in the OPTION register. When the E clock is slower than 1 MHz,
the CSEL bit must be set to ensure that the successive approximation sequence for the A/D converter
will be completed before any charge loss occurs. In the case of the EEPROM, it is the efficiency of the
charge pump that is affected.
Figure 14 A/D Converter Block Diagram
The A/D converter can operate in single or multiple conversion modes. Multiple conversions are per-
formed in sequences of four. Sequences can be performed on a single channel or on a group of chan-
nels.
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
C
C
C
M
S
C
C
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
V
RH
V
RL
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC11KA4VFN2 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
MC68HC11KA4VFN3 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
MC68HC11KA4VFN4 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
MC68HC11KA4VFU2 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
MC68HC11KA4VFU3 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
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