參數(shù)資料
型號： ADUC841
廠商： Analog Devices, Inc.
英文描述： MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU
中文描述： MicroConverter的12位ADC和嵌入式高速DAC的62 - kB的閃存微控制器
文件頁數(shù)： 59/88頁
文件大?。?/td> 903K
代理商： ADUC841
ADuC841/ADuC842/ADuC843
MOSI is shared with P3.3 and, as such, has the same
configuration as the one shown in Figure 61.
Rev. 0 | Page 59 of 88
MCO
I2CM
Q3
Q4
SCLOCK
PIN
Q2
Q1
(OFF)
DV
DD
50ns GLITCH
REJECTION FILTER
SPE = 0 (I
2
C ENABLE)
HARDWARE I
2
C
(SLAVE ONLY)
SFR
BITS
0
Figure 63. SCLOCK Pin I/O Functional Equivalent in I
2
C Mode
Q3
Q1
Q2 (OFF)
DV
DD
Q4 (OFF)
SDATA/
MOSI
PIN
SPE = 1 (SPI ENABLE)
HARDWARE SPI
(MASTER/SLAVE)
0
Figure 64. SDATA/MOSI Pin I/O Functional Equivalent in SPI Mode
Q3
Q4
Q2
Q1
(OFF)
DV
DD
MCO
SDATA/
MOSI
PIN
50ns GLITCH
REJECTION FILTER
SPE = 0 (I
2
C ENABLE)
HARDWARE I
2
C
(SLAVE ONLY)
SFR
BITS
MCI
MDE
I2CM
0
Figure 65. SDATA/MOSI Pin I/O Functional Equivalent in I
2
C Mode
Read-Modify-Write Instructions
Some 8051 instructions that read a port read the latch while
others read the pin. The instructions that read the latch rather
than the pins are the ones that read a value, possibly change it,
and then rewrite it to the latch. These are called read-modify-
write instructions, which are listed below. When the destination
operand is a port or a port bit, these instructions read the latch
rather than the pin.
Table 27. Read-Write-Modify Instructions
Instruction
Description
ANL
Logical AND, e.g., ANL P1, A
ORL
(Logical OR, e.g., ORL P2, A
XRL
(Logical EX-OR, e.g., XRL P3, A
JBC
Jump if Bit = 1 and clear bit, e.g., JBC P1.1,
LABEL
CPL
Complement bit, e.g., CPL P3.0
INC
Increment, e.g., INC P2
DEC
Decrement, e.g., DEC P2
DJNZ
Decrement and Jump if Not Zero, e.g., DJNZ
P3, LABEL
MOV PX.Y, C
1
Move Carry to Bit Y of Port X
CLR PX.Y
1
Clear Bit Y of Port X
SETB PX.Y
1
Set Bit Y of Port X
1
These instructions read the port byte (all 8 bits), modify the addressed bit,
and then write the new byte back to the latch.
Read-modify-write instructions are directed to the latch rather
than to the pin to avoid a possible misinterpretation of the
voltage level of a pin. For example, a port pin might be used to
drive the base of a transistor. When 1 is written to the bit, the
transistor is turned on. If the CPU then reads the same port bit
at the pin rather than the latch, it reads the base voltage of the
transistor and interprets it as a Logic 0. Reading the latch rather
than the pin returns the correct value of 1.
相關(guān)PDF資料
PDF描述
ADUC841BCP62-3 MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU
ADUC841BCP62-5 Cable Gland (Clamp); Connector Shell Size:10SL, 12S; Thread Size:5/8-24; Approval Categories:MIL-C-5015; Series:97 RoHS Compliant: Yes
ADUC841BCP8-3 10-823955-004
ADUC841BCP8-5 Cable Gland (Clamp); Connector Shell Size:14, 14S; Thread Size:3/4-20; Body Material:Zinc Alloy
ADUC841BS62-3 MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADUC841BCP32-5 制造商:Analog Devices 功能描述:MICROCONVERTER 1-CYCLE VERSION ADUC829 - Trays
ADUC841BCP62-3 制造商:Analog Devices 功能描述:MCU 8-Bit ADuC8xx 8052 CISC 62KB Flash 3V 56-Pin LFCSP EP 制造商:Rochester Electronics LLC 功能描述:8BIT CISC 62KB FLASH 20MHZ 3.3V 56LFCSP - Bulk
ADUC841BCP62-5 制造商:Analog Devices 功能描述:MCU 8-Bit ADuC8xx 8052 CISC 62KB Flash 5V 56-Pin LFCSP EP
ADUC841BCP8-3 制造商:Analog Devices 功能描述:MCU 8-bit ADuC8xx 8052 CISC 62KB Flash 3V 56-Pin LFCSP EP 制造商:Rochester Electronics LLC 功能描述:8BIT CISC 62KB FLASH 20MHZ 3.3V 56LFCSP - Bulk
ADUC841BCP8-5 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU
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