收藏本站
参数资料
型号： MC68HC11A1VP2
厂商： ABILIS SYSTEMS
元件分类： 微控制器/微处理器
英文描述： 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDIP48
封装： PLASTIC, DIP-48
文件页数： 122/158页
文件大小： 3803K
代理商： MC68HC11A1VP2
ANALOG-TO-DIGITAL CONVERTER
MC68HC11A8
7-2
TECHNICAL DATA
7
7.3 Single-Channel Operation
There are two variations of single-channel operation. In the first variation (SCAN = 0),
the single selected channel is converted four consecutive times with the first result be-
ing stored in A/D result register 1 (ADR1) and the fourth result being stored in register
ADR4. After the fourth conversion is complete, all conversion activity is halted until a
new conversion command is written to the ADCTL register. In the second variation
(SCAN = 1), conversions continue to be performed on the selected channel with the
fifth conversion being stored in register ADR1 (overwriting the first conversion result),
the sixth conversion overwrites ADR2, and so on.
Figure 7-1 A/D Conversion Sequence
Figure 7-2 A/D Pin Model
7.4 Multiple-Channel Operation
There are two variations in multiple-channel operation. In the first variation (SCAN =
0), the selected group of four channels are converted, one time each, with the first re-
sult being stored in register ADR1 and the fourth result being stored in register ADR4.
After the fourth conversion is complete, all conversion activity is halted until a new con-
version command is written to the ADCTL register. In the second variation (SCAN =
1), conversions continue to be performed on the selected group of channels with the
fifth conversion being stored in register ADR1 (replacing the earlier conversion result
for the first channel in the group), the sixth conversion overwrites ADR2, and so on.
0
32
64
96
128 — E CYCLES
SAMPLE ANALOG INPUT
SUCCESSIVE APPROXIMATION SEQUENCE
MSB
4
CYCLES
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
2
CYC
END
REPEAT
SEQUENCE,
SCAN
=
1
SET
CC
FLAG
CONVERT FIRST
CHANNEL, UPDATE
ADR1
CONVERT SECOND
CHANNEL, UPDATE
ADR2
CONVERT THIRD
CHANNEL, UPDATE
ADR3
CONVERT FOURTH
CHANNEL, UPDATE
ADR4
12 E CYCLES
WRITE
TO
ADCTL
E CLOCK
DIFFUSION/POLY
< 2 pF
COUPLER
400 nA
JUNCTION
LEAKAGE
+ ~20V
– ~0.7V
*
* THIS ANALOG SWITCH IS CLOSED ONLY DURING THE 12-CYCLE SAMPLE TIME.
VRL
INPUT
+ ~12V
– ~0.7V
PROTECTION
DEVICE
≤ 4 K
DUMMY N-CHANNEL
OUTPUT DEVICE
ANALOG
INPUT
PIN
~ 20 pF
DAC
CAPACITANCE
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相关PDF资料
PDF描述
M30280F6HP 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP80
M30280F8HP-D9 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP80
M30280FCBHP-U7 16-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP80
M30291M8V-XXXHP 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP64
M3062CF8TGP-U 16-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP100
相关代理商/技术参数
参数描述
MC68HC11A8 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:8-Bit Microcontrollers
MC68HC11A8BCFN2 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:HCMOS Single-Chip Microcontroller
MC68HC11A8BCFU2 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:HCMOS Single-Chip Microcontroller
MC68HC11A8BCP2 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:HCMOS Single-Chip Microcontroller
MC68HC11A8BMP2 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:HCMOS Single-Chip Microcontroller
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*