參數(shù)資料
型號: GMS87C7216LQ
廠商: Electronic Theatre Controls, Inc.
元件分類: 數(shù)學(xué)處理器
英文描述: 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 8位單晶片微控制器
文件頁數(shù): 57/121頁
文件大小: 1645K
代理商: GMS87C7216LQ
GMS81C7208/7216
FEB. 2005 Ver 1.04
53
(3) AD pin sharing with normal I/O port
The analog input pins AN1 to AN3 also function as input/output
port (PORT R21~R23) pins. When A/D conversion is performed
with any of pins AN1 to AN3 selected, be sure not to execute a
PORT input instruction while conversion is in progress, as this
may reduce the conversion resolution.
Also, if digital pulses are applied to a pin adjacent to the pin in the
process of A/D conversion, the expected A/D conversion value
may not be obtainable due to coupling noise. Therefore, avoid ap-
plying pulses to pins adjacent to the pin undergoing A/D conver-
sion.
(4) AV
DD
pin input impedance
A series resistor string of approximately 10k
is connected be-
tween the AV
DD
pin and the AV
SS
pin.
Therefore, if the output impedance of the reference voltage
source is high, this will result in parallel connection to the series
resistor string between the AV
DD
pin and the AV
SS
pin, and there
will be a large reference voltage error.
Figure 14-3 A/D Converter Operation Flow
Figure 14-4 A/D Converter Control Register
ENABLE A/D CONVERTER
A/D START ( ADST = 1 )
NOP
ADSF = 1
A/D INPUT CHANNEL SELECT
ANALOG REFERENCE SELECT
READ ADR
YES
NO
BTCL
7
-
6
5
4
3
2
1
0
ADEN
ADST
A/D status bit
0: A/D conversion is in progress
1: A/D conversion is completed
Analog input channel select
001: Channel 1 (AN1)
010: Channel 2 (AN2)
011: Channel 3 (AN3)
INITIAL VALUE: -0-0 0001
B
ADDRESS: 0EC
H
ADCM
ADSF
A/D converter Enable bit
0: A/D converter module turn off and
current is not flow.
1: Enable A/D converter
R/W
R/W
R/W
R/W
R/W
R
A/D start bit
0: -
1: A/D start
Setting this bit starts an A/D conversion.
After one cycle, bit is cleared to “0” by hardware.
-
ADS2
INITIAL VALUE: Undefined
ADDRESS: 0ED
ADR
A/D Conversion Data
BTCL
7
6
5
4
3
2
1
0
R
R
R
R
R
R
R
R
-
-
相關(guān)PDF資料
PDF描述
GNR20D101K VARISTOR
GNR20D102K VARISTOR
GNR20D112K VARISTOR
GNR20D121K VARISTOR
GNR20D151K VARISTOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
GMS87C7216Q 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLERS
GM-S-88 功能描述:以太網(wǎng)和電信連接器 8P8C R/A PCB SHIELD LOW PROFILE BLACK RoHS:否 制造商:Pulse 產(chǎn)品:Modular Jacks 性能類別: USOC 代碼:RJ45 位置/觸點數(shù)量: 安裝風(fēng)格:Through Hole 端口數(shù)量:1 x 1 型式:Female 屏蔽: 電流額定值: 電壓額定值: 觸點電鍍: 外殼材料:Thermoplastic IP 等級:
GM-S-88-50 功能描述:以太網(wǎng)和電信連接器 8P8C R/A PCB SHIELD LOW PROFILE BLK 50u RoHS:否 制造商:Pulse 產(chǎn)品:Modular Jacks 性能類別: USOC 代碼:RJ45 位置/觸點數(shù)量: 安裝風(fēng)格:Through Hole 端口數(shù)量:1 x 1 型式:Female 屏蔽: 電流額定值: 電壓額定值: 觸點電鍍: 外殼材料:Thermoplastic IP 等級:
GMS90 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLERS
GMS90C31 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS