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| 型號(hào)： | MC68HC705JB2DW |
| 廠(chǎng)商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 3 MHz, MICROCONTROLLER, PDSO20 |
| 封裝： | SOIC-20 |
| 文件頁(yè)數(shù)： | 75/128頁(yè) |
| 文件大?。?/td> | 2493K |
| 代理商： | MC68HC705JB2DW |
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GENERAL RELEASE SPECIFICATION
August 28, 1998
INPUT/OUTPUT PORTS
MC68HC705JB2
7-4
REV 1.1
7.2
PORT B
Port B is a 3-bit bidirectional port which functions as shown in Figure 7-2. Each
Port B pin is controlled by the corresponding bits in a data direction register, a
data register, and a pulldown/up register. The Port B Data Register is located at
address $0001. The Port B Data Direction Register (DDRB) is located at address
$0005. The Port B Pulldown/up Register (PDURB) is located at address $0011.
Reset clears the DDRB and the PDURB. The Port B Data Register is unaffected
by reset.
PB0 is a standard push-pull I/O pin with pulldown option; and is shared with TCAP.
PB1 and PB2 are of open-drain type, with pullup option, each capable of sinking
25mA (typical) current at VOL 0.5V max. These two pins may be connected
together to constitute a single pin capable of sinking 50mA (typical). In this case,
both PB1 and PB2 data bits will have to be written with the same value at the
same write cycle.
Figure 7-2. Port B I/O Circuitry
7.2.1 Port B Data Register
All Port B I/O pins have a corresponding bit in the Port B Data Register. When a
Port B pin is programmed as an output the state of the corresponding data
register bit determines the state of the output pin. When a Port B pin is
programmed as an input, any read of the Port B Data Register will return the logic
state of the corresponding I/O pin. The Port B data register is unaffected by reset.
Unused bits will always read as logic zeros, and any write to these bits will be
ignored. The Port B data register is unaffected by reset.
Write $0011
Read $0001
Write $0001
Read $0005
Write $0005
Internal HC05
Data Bus
100
A
Pulldown
Data
Register Bit
Output
Mask Option
(Software Pulldown/up Inhibit)
Reset
(RST)
Data Direction
Register Bit
Pulldown/up
Register Bit
VDD
100K
Pullup
Note: Each I/O port pin can have either pullup or pulldown device, but not both.
PB1 and PB2 output drivers are of open-drain type
I/O Pin
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For More Information On This Product,
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| MC68HC705JB4DW | 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
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| MC68HC705JP7CDW | 功能描述:IC MCU 8BIT 28-SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標(biāo)準(zhǔn)包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設(shè)備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數(shù):26 程序存儲(chǔ)器容量:64KB（64K x 8） 程序存儲(chǔ)器類(lèi)型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤(pán) 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱(chēng):497-9032STM32F101T8U6-ND |
| MC68HC705JP7CP | 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述: |
| MC68HC705K1CDW | 制造商:Motorola Inc 功能描述: |
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