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| 型號： | MC68HC705SR3CP |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | PLASTIC, DIP-40 |
| 文件頁數(shù)： | 20/96頁 |
| 文件大?。?/td> | 3045K |
| 代理商： | MC68HC705SR3CP |
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MC68HC05SR3
Freescale
3-1
INPUT/OUTPUT PORTS
3
INPUT/OUTPUT PORTS
The MC68HC05SR3 has 32 bidirectional I/O lines, arranged as four 8-bit I/O ports (Port A, B, C,
and D). The individual bits in these ports are programmable as either inputs or outputs under
software control by the Data Direction Registers (DDRs). All port pins each has an associated
20K
pull-up resistor, which can be connected/disconnected under software control. Also, each
port pin is capable of sinking and driving a maximum current of 10mA (e.g. direct drive for LEDs).
Port A can also be configured for keyboard interrupts.
3.1
Parallel Ports
Port A, B, C, and D are 8-bit bidirectional ports. Each Port pin is controlled by the corresponding
bits in a Data Direction Register and a Data Register as shown in Figure 3-1. The functions of the
I/O pins are summarized in Table 3-1.
3.1.1
Port Data Registers
Each Port I/O pin has a corresponding bit in the Port Data Register. When a Port I/O pin is
programmed as an output the state of the corresponding data register bit determines the state of
the output pin. All Port I/O pins can drive a current of 10mA when programmed as outputs. When
a Port pin is programmed as an input, any read of the Port Data Register will return the logic state
of the corresponding I/O pin. The locations of the Data Registers for Port A, B, C, and D are at
$00, $01, $02, and $03 respectively. The Port Data Registers are unaffected by reset.
Table 3-1 I/O Pin Functions
R/W
DDR
I/O Pin Function
0
The I/O pin is in input mode. Data is written into the output data latch.
0
1
Data is written into the output data latch and output to the I/O pin.
1
0
The state of the I/O pin is read.
1
The I/O pin is in an output mode. The output data latch is read.
TPG
25
05SR3.Book Page 1 Thursday, August 4, 2005 1:08 PM
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PDF描述 |
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| MC68HC705SR3CFB | 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQFP44 |
| MC68HC705SR3CB | 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDIP42 |
| MC68HC05SR3CB | 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDIP42 |
| MC68HC05SR3CP | 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDIP40 |
| MC68HC705SR3B | 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDIP42 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC705SR3CPE | 功能描述:8位微控制器 -MCU 8B MCU 192 BYTES RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小: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 |
| MC68HC705SR3CPE | 制造商:Freescale Semiconductor 功能描述:8-Bit Microcontroller IC |
| MC68HC705SR3PE | 功能描述:IC MCU 3.75K 2.1MHZ OTP 40-DIP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 標(biāo)準(zhǔn)包裝:1 系列:AVR® ATmega 核心處理器:AVR 芯體尺寸:8-位 速度:16MHz 連通性:I²C，SPI，UART/USART 外圍設(shè)備:欠壓檢測/復(fù)位，POR，PWM，WDT 輸入/輸出數(shù):32 程序存儲器容量:32KB（16K x 16） 程序存儲器類型:閃存 EEPROM 大小:1K x 8 RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:44-TQFP 包裝:剪切帶 (CT) 其它名稱:ATMEGA324P-B15AZCT |
| MC68HC706P6ACDW | 制造商:Motorola Inc 功能描述: |
| MC68HC708MP16CFU | 制造商:MAJOR 功能描述: |
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