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| 型號(hào)： | T89C51RD2-SLRI-M |
| 廠商： | Atmel Corp. |
| 英文描述： | 0 to 40MHz Flash Programmable 8-bit Microcontroller |
| 中文描述： | 0至40MHz可編程閃存8位微控制器 |
| 文件頁(yè)數(shù)： | 6/170頁(yè) |
| 文件大?。?/td> | 1927K |
| 代理商： | T89C51RD2-SLRI-M |
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6
A/T89C51CC01
4129L–CAN–08/05
P3.0:7
I/O
Port 3:
Is an 8-bit bi-directional I/O port with internal pull-ups. Port 3 pins that have 1’s written to them are pulled high by the internal
pull-up transistors and can be used as inputs in this state. As inputs, Port 3 pins that are being pulled low externally will be a
source of current (I
IL
, see section "Electrical Characteristic") because of the internal pull-ups.
The output latch corresponding to a secondary function must be programmed to one for that function to operate (except for
TxD and WR). The secondary functions are assigned to the pins of port 3 as follows:
P3.0/RxD:
Receiver data input (asynchronous) or data input/output (synchronous) of the serial interface
P3.1/TxD:
Transmitter data output (asynchronous) or clock output (synchronous) of the serial interface
P3.2/INT0:
External interrupt 0 input/timer 0 gate control input
P3.3/INT1:
External interrupt 1 input/timer 1 gate control input
P3.4/T0:
Timer 0 counter input
P3.5/T1:
Timer 1 counter input
P3.6/WR:
External Data Memory write strobe; latches the data byte from port 0 into the external data memory
P3.7/RD:
External Data Memory read strobe; Enables the external data memory.
It can drive CMOS inputs without external pull-ups.
P4.0:1
I/O
Port 4:
Is an 2-bit bi-directional I/O port with internal pull-ups. Port 4 pins that have 1’s written to them are pulled high by the internal
pull-ups and can be used as inputs in this state. As inputs, Port 4 pins that are being pulled low externally will be a source of
current (IIL, on the datasheet) because of the internal pull-up transistor.
The output latch corresponding to a secondary function RxDC must be programmed to one for that function to operate. The
secondary functions are assigned to the two pins of port 4 as follows:
P4.0/TxDC:
Transmitter output of CAN controller
P4.1/RxDC:
Receiver input of CAN controller.
It can drive CMOS inputs without external pull-ups.
Table 1.
Pin Description (Continued)
Pin Name
Type
Description
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| T89C51RD2-SLTC-L | 0 to 40MHz Flash Programmable 8-bit Microcontroller |
| T89C51SND1 | Single Chip Microcontroller with MP3 Decoder and Man Machine Interface |
| T89C51SND1-ROTIL | Single Chip Microcontroller with MP3 Decoder and Man Machine Interface |
| T89C51IC2 | 8-bit Microcontroller with Flash and I2C Interface |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| T89C51RD2-SLSCL | 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:0 to 40 MHz Flash Programmable 8-bit Microcontroller |
| T89C51RD2-SLSC-L | 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:0 to 40MHz Flash Programmable 8-bit Microcontroller |
| T89C51RD2-SLSCM | 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:0 to 40 MHz Flash Programmable 8-bit Microcontroller |
| T89C51RD2-SLSC-M | 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:0 to 40MHz Flash Programmable 8-bit Microcontroller |
| T89C51RD2-SLSIL | 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:0 to 40 MHz Flash Programmable 8-bit Microcontroller |
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