- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄381493 > AT83C51RB2XXX-SLSIL (ATMEL CORP) Microcontroller PDF資料下載
參數(shù)資料
| 型號： | AT83C51RB2XXX-SLSIL |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Microcontroller |
| 中文描述： | 8-BIT, MROM, 40 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數(shù)： | 54/81頁 |
| 文件大小： | 1082K |
| 代理商： | AT83C51RB2XXX-SLSIL |
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頁當前第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
55
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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AT83C51RB2XXX-SLSIM | Microcontroller |
| AT83C51RC2XXX-3CSCM | Microcontroller |
| AT83C51RC2XXX-3CSIM | Microcontroller |
| AT83C51RC2XXX-RLTIL | Microcontroller |
| AT83C51RC2XXX-RLTIM | Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT83C51RB2XXX-SLSIM | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Microcontroller |
| AT83C51RC2 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:80C51 High Performance ROM 8-bit Microcontroller |
| AT83C51RC2-3CSUL | 制造商:IRF 制造商全稱:International Rectifier 功能描述:High Performance 8-bit Microcontroller |
| AT83C51RC2-3CSUM | 制造商:IRF 制造商全稱:International Rectifier 功能描述:High Performance 8-bit Microcontroller |
| AT83C51RC2-RLTUL | 制造商:IRF 制造商全稱:International Rectifier 功能描述:High Performance 8-bit Microcontroller |
發(fā)布緊急采購，3分鐘左右您將得到回復。