- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69026 > MC68HC05L25PB (FREESCALE SEMICONDUCTOR INC) 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP52 PDF資料下載
參數(shù)資料
| 型號： | MC68HC05L25PB |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP52 |
| 封裝： | TQFP-52 |
| 文件頁數(shù)： | 19/152頁 |
| 文件大小： | 897K |
| 代理商： | MC68HC05L25PB |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁當(dāng)前第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁第151頁第152頁
A/D Status and Control Register
MC68HC05L25 Data Sheet, Rev. 3.1
Freescale Semiconductor
115
12.8 A/D Status and Control Register
The ADSC register reports the completion of A/D conversion and provides control over oscillator
selection, analog subsystem power, and input channel selection.
CC — Conversion Complete
This read-only status bit is set when a conversion sequence has completed and data is ready to be
read from the ADDR register. CC is cleared when a channel is selected for conversion, when data is
read from the ADDR register, or when the A/D subsystem is turned off. Once a conversion has been
started, conversions of the selected channel will continue every 32 PH2 clock cycles until the ADSC
register is written to again. During continuous conversion operation, the ADDR register will be updated
with new data and the CC bit will be set every 32 PH2 clock cycles. Also, data from the previous
conversion will be overwritten regardless of the state of the CC bit.
1 = A/D conversion sequence completed
0 = A/D subsystem is off or conversion is in progress
ADRC — RC Oscillator Control
When ADRC is set, the A/D subsystem operates from the internal RC oscillator instead of the PH2
clock. The RC oscillator requires a time, tRCON, to stabilize before accurate conversion results can be
obtained. See 12.5.2 Internal versus External Oscillator for more information.
1 = RC OSC on
0 = RC OSC off
ADON — A/D Subsystem On
When the A/D subsystem is turned on (ADON = 1), it requires a time, tADON, to stabilize before
accurate conversion results can be attained.
1 = A/D subsystem enabled
0 = A/D subsystem disabled
Bits 4:3 — Reserved
These bits are not used and always read as zero.
CH2:CH0 — Channel Select Bits
Channel select bits CH2, CH1, and CH0 form a 3-bit field which is used to select an input to the A/D
converter. Channels 0 and 1 correspond to port A input pins PA4 and PA5. Channels 4–6 are used for
reference measurements. In single-chip mode, channels 2, 3, and 7 are reserved. If a conversion is
attempted with channel 2, 3, or 7 selected, the result will be undefined. Table 12-1 lists the inputs
selected by bits CH0–CH2.
If the ADON bit is set, and an input from channel 0 or 1 is selected, the corresponding port A pin will
not function as a digital port. If the port A data register is read when DDR = 0 while the A/D is on and
one of the shared input channels is selected using bits CH0–CH2, the corresponding port A pin will
Address:
$001E
Bit 7
654321
Bit 0
Read:
CC
ADRC
ADON
00
CH2
CH1
CH0
Write:
Reset:
00000000
= Unimplemented
Figure 12-1. A/D Status and Control Register (ADSC)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC68HC05LJ5P | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP16 |
| MC68HC05M4CFN | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC52 |
| MC68HC05M4MFN | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC52 |
| MC68HC05P1ADWR2 | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28 |
| MC68HSC05P1ADWR2 | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDSO28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC05L28 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit |
| MC68HC05L28B | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Flexible general-purpose microcomputer |
| MC68HC05L2B | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit |
| MC68HC05L2CB | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit |
| MC68HC05L6 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-Bit Microcomputer with Liquid Crystal Driver Circuitry |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。