參數(shù)資料
型號: MC68HC11EA9CFN3
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
文件頁數(shù): 51/58頁
文件大?。?/td> 583K
代理商: MC68HC11EA9CFN3
MC68HC11EA9
MOTOROLA
MC68HC11EA9TS/D
55
Figure 15 A/D Conversion Sequence
Figure 16 Electrical Model of an A/D Input Pin (Sample Mode)
MSB
4
CYCLES
E CLOCK
WRITE
TO
ADCTL
BIT 6
2
CYC
BIT 5
2
CYC
BIT 4
2
CYC
BIT 3
2
CYC
BIT 2
2
CYC
BIT 1
2
CYC
LSB
2
CYC
END
12 E CYCLES
SAMPLE ANALOG INPUT
SUCCESSIVE APPROXIMATION SEQUENCE
2
CYC
CONVERT FOURTH
CHANNEL
AND UPDATE ADR4
CONVERT THIRD
CHANNEL
AND UPDATE ADR3
CONVERT SECOND
CHANNEL
AND UPDATE ADR2
CONVERT FIRST
CHANNEL
AND UPDATE ADR1
SET
CCF
FLAG
REPEAT
SEQUENCE
IF
SCAN
=
1
E
CYCLES
128
96
64
32
0
EA9 A/D CONVERSION TIM
EA9 ANALOG INPUT PIN
ANALOG
INPUT
PIN
400 nA
JUNCTION
LEAKAGE
< 2 pF
+ ~20 V
– ~0.7 V
~20 pF
DAC
CAPACITANCE
VRL
DIFFUSION AND
POLY COUPLER
< 4 K
INPUT
PROTECTION
DEVICE
*THIS ANALOG SWITCH IS CLOSED ONLY DURING THE 12-CYCLE SAMPLE TIME.
*
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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