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參數(shù)資料
| 型號(hào)： | AT80C51RD2 |
| 廠商： | Atmel Corp. |
| 英文描述： | ER 6C 3#16 3#8 SKT RECP BOX |
| 中文描述： | 80C51的高性能ROM的8位微控制器 |
| 文件頁數(shù)： | 54/81頁 |
| 文件大小： | 1082K |
| 代理商： | AT80C51RD2 |
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AT80C51RD2/AT83C51Rx2
4113A–8051–09/02
Keyboard Interface
The T8xc51Rx2 implement a keyboard interface allowing the connection of a 8 x n
matrix keyboard. It is based on 8 inputs with programmable interrupt capability on both
high or low level. These inputs are available as alternate function of P1 and allow to exit
from idle and power-down modes.
The keyboard interfaces with the C51 core through 3 special function registers: KBLS,
the Keyboard Level Selection register (Table 42), KBE, The Keyboard Interrupt Enable
register (Table 41), and KBF, the Keyboard Flag register (Table 40).
Interrupt
The keyboard inputs are considered as 8 independent interrupt sources sharing the
same interrupt vector. An interrupt enable bit (KBD in IE1) allows global enable or dis-
able of the keyboard interrupt (see Figure 20). As detailed in Figure 21 each keyboard
input has the capability to detect a programmable level according to KBLS.x bit value.
Level detection is then reported in interrupt flags KBF.x that can be masked by software
using KBE.x bits.
This structure allow keyboard arrangement from 1 x n to 8 x n matrix and allows usage
of P1 inputs for other purpose.
Figure 20.
Keyboard Interface Block Diagram
Figure 21.
Keyboard Input Circuitry
Power Reduction Mode
P1 inputs allow exit from idle and power-down modes as detailed in Section “Power-
down Mode”, page 59.
P1:x
KBE.x
KBF.x
KBLS.x
0
1
V
CC
Internal Pull-up
P1.0
Keyboard Interface
Interrupt Request
KBD
IE1
Input Circuitry
P1.1
Input Circuitry
P1.2
Input Circuitry
P1.3
Input Circuitry
P1.4
Input Circuitry
P1.5
Input Circuitry
P1.6
Input Circuitry
P1.7
Input Circuitry
KBDIT
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| AT83C51RB2 | 80C51 High Performance ROM 8-bit Microcontroller |
| AT83C51RC2 | 80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2-3CSCM | Microcontroller |
| AT80C51RD2-3CSIM | Microcontroller |
| AT80C51RD2-RLTIL | Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT80C51RD2_05 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2_08 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2_09 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2-3CSCM | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT80C51RD2-3CSIM | 功能描述:IC MCU 8051 5V SPI 20MHZ 40-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:80C 標(biāo)準(zhǔn)包裝:9 系列:87C 核心處理器:8051 芯體尺寸:8-位 速度:40/20MHz 連通性:UART/USART 外圍設(shè)備:POR，WDT 輸入/輸出數(shù):32 程序存儲(chǔ)器容量:32KB（32K x 8） 程序存儲(chǔ)器類型:OTP EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:0°C ~ 70°C 封裝/外殼:40-DIP（0.600"，15.24mm） 包裝:管件 |
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