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| 型號(hào)： | SAF-C515A-LM |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, 18 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | METRIC, PLASTIC, QFP-80 |
| 文件頁(yè)數(shù)： | 16/58頁(yè) |
| 文件大?。?/td> | 634K |
| 代理商： | SAF-C515A-LM |
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Semiconductor Group
23
1997-10-01
C515A
Digital I/O Ports
The C515A allows for digital I/O on 48 lines grouped into 6 bidirectional 8-bit ports. Each port bit
consists of a latch, an output driver and an input buffer. Read and write accesses to the I/O ports P0
through P5 are performed via their corresponding special function registers P0 to P5.
The output drivers of port 0 and 2 and the input buffers of port 0 are also used for accessing external
memory. In this application, port 0 outputs the low byte of the external memory address, time-
multiplexed with the byte being written or read. Port 2 outputs the high byte of the external memory
address when the address is 16 bits wide. Otherwise, the port 2 pins continue emitting the P2 SFR
contents.
Analog Input Ports
Ports 6 is available as input port only and provides two functions. When used as digital inputs, the
corresponding SFR P6 contains the digital value applied to the port 6 lines. When used for analog
inputs the desired analog channel is selected by a three-bit field in SFR ADCON0. Of course, it
makes no sense to output a value to these input-only ports by writing to the SFR P6. This will have
no effect.
If a digital value is to be read, the voltage levels are to be held within the input voltage specifications
(
V
IL/VIH). Since P6 is not bit-addressable, all input lines of P6 are read at the same time by byte
instructions.
Nevertheless, it is possible to use port 6 simultaneously for analog and digital input. However, care
must be taken that all bits of P6 that have an undetermined value caused by their analog function
are masked.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAFC515C8EM | 制造商:Infineon Technologies AG 功能描述:8bit microcontrollerSAF-C515C-8EM MQFP80 |
| SAF-C515C-8EM | 制造商:Infineon Technologies AG 功能描述:IC 8BIT MCU OTP SMD 制造商:Infineon Technologies AG 功能描述:IC, 8BIT MCU OTP, SMD |
| SAFC515C-8EM | 制造商:Infineon Technologies AG 功能描述:IC 8BIT CPU SMD MQFP80 515 |
| SAF-C515C-8EM CA | 功能描述:8位微控制器 -MCU 8 BIT OTP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線(xiàn)寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| SAFC515C8EM-BC | 制造商:Infineon Technologies AG 功能描述:MCU 8-Bit C500 8051 CISC 64KB EPROM 5V 80-Pin MQFP |
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