參數(shù)資料
型號: T89C51RB2-SLSIL
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: 8-bit Microcontroller with 16 Kbytes/ 32 Kbytes FLASH
中文描述: 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 8/170頁
文件大?。?/td> 1927K
代理商: T89C51RB2-SLSIL
8
A/T89C51CC01
4129L–CAN–08/05
Figure 1.
Port 1, Port 3 and Port 4 Structure
Note:
The internal pull-up can be disabled on P1 when analog function is selected.
Port 0 and Port 2
Ports 0 and 2 are used for general-purpose I/O or as the external address/data bus. Port
0, shown in Figure 3, differs from the other Ports in not having internal pull-ups. Figure 3
shows the structure of Port 2. An external source can pull a Port 2 pin low.
To use a pin for general-purpose output, set or clear the corresponding bit in the Px reg-
ister (x = 0 or 2). To use a pin for general-purpose input, set the bit in the Px register to
turn off the output driver FET.
Figure 2.
Port 0 Structure
Notes:
1. Port 0 is precluded from use as general-purpose I/O Ports when used as
address/data bus drivers.
2. Port 0 internal strong pull-ups assist the logic-one output for memory bus cycles only.
Except for these bus cycles, the pull-up FET is off, Port 0 outputs are open-drain.
D
CL
Q
P1.X
P4.X
LATCH
INTERNAL
BUS
WRITE
TO
LATCH
READ
PIN
READ
LATCH
P1.x
P3.x
P4.x
ALTERNATE
OUTPUT
FUNCTION
VCC
INTERNAL
PULL-UP (1)
ALTERNATE
INPUT
FUNCTION
D
Q
P0.X
LATCH
INTERNAL
BUS
WRITE
TO
LATCH
READ
PIN
READ
LATCH
0
1
P0.x (1)
ADDRESS LOW/
DATA
CONTROL
VDD
(2)
相關(guān)PDF資料
PDF描述
T89C51RB2-SLSIM 8-bit Microcontroller with 16 Kbytes/ 32 Kbytes FLASH
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
T89C51RB2-SLSIM 功能描述:IC MICRO CTRL 16K FLASH 44PLCC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:89C 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 程序存儲器容量:32KB(32K x 8) 程序存儲器類型: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
T89C51RB2-SLTCL 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 16 Kbytes/ 32 Kbytes FLASH
T89C51RB2-SLTCM 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 16 Kbytes/ 32 Kbytes FLASH
T89C51RB2-SLTIL 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 16 Kbytes/ 32 Kbytes FLASH
T89C51RB2-SLTIM 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 16 Kbytes/ 32 Kbytes FLASH