参数资料
型号: MC68HC11C0FN3
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 3 MHz, MICROCONTROLLER, PQCC68
封装: PLASTIC, LCC-68
文件页数: 70/76页
文件大小: 394K
代理商: MC68HC11C0FN3
MOTOROLA
MC68HC11C0
72
MC68HC11C0TS/D
Figure 17 Timing Diagram for a Sequence of Four A/D Conversions
Figure 18 Electrical Model of an Analog Input Pin (Sample Mode)
MSB
4
CYCLES
E CLOCK
WRITE
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 ADDR4
CONVERT THIRD
CHANNEL
AND UPDATE ADDR3
CONVERT SECOND
CHANNEL
AND UPDATE ADDR2
CONVERT FIRST
CHANNEL
AND UPDATE ADDR1
SET
REPEAT
E
CYCLES
128
96
64
32
0
TO
ADCTL
SEQUENCE
IF
SCAN = 1
CCF
FLAG
DAC
CAPACITANCE
VRL
ANALOG
INPUT
PIN
~ 20 pF
+ ~ 20 V
~ 0.7 V
< 2 pF
INPUT
PROTECTION
DEVICE
400 nA
JUNCTION
LEAKAGE
DIFFUSION AND
POLY COUPLER
≤ 4 k
* This analog switch is closed only during the 12-cycle sample time.
*
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