參數(shù)資料
型號: MC68HC705P6ACP
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: HCMOS Microcontroller Unit
中文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP28
封裝: PLASTIC, DIP-28
文件頁數(shù): 52/130頁
文件大?。?/td> 1541K
代理商: MC68HC705P6ACP
Input/Output Ports
Advance Information
MC68HC705P6A
Rev. 2.0
52
Input/Output Ports
MOTOROLA
6.3 Port A
Port A is an 8-bit bidirectional port, which does not share any of its pins
with other subsystems (see
Figure 6-1
). The port A data register is
located at address $0000 and its data direction register (DDR) is located
at address $0004. The contents of the port A data register are
indeterminate at initial power up and must be initialized by user software.
Reset does not affect the data registers, but does clear the DDRs,
thereby setting all of the port pins to input mode. Writing a 1 to a DDR bit
sets the corresponding port pin to output mode. Port A has mask option
register enabled interrupt capability with an internal pullup device
NOTE:
The keyscan (pullup/interrupt) feature available on port A is NOT
available in the ROM device, MC68HC05P6.
Figure 6-1. Port A I/O and Interrupt Circuitry
READ $0000
WRITE $0000
READ $0004
DATA
REGISTER BIT
I/O
PIN
OUTPUT
INTERNAL HC05
DATA BUS
RESET
(RST)
WRITE $0004
DATA DIRECTION
REGISTER BIT
TO IRQ
INTERRUPT SYSTEM
V
DD
PULLUP MASK
OPTION REGISTER
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC705P6ADW 制造商:Rochester Electronics LLC 功能描述:MCU, 176 BYTES RAM, A/D - Bulk
MC68HC705P6AMDW 功能描述:IC MCU 4.6K OTP 2.1MHZ 28-SOIC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:HC05 標(biāo)準(zhǔn)包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN,SCI,SPI 外圍設(shè)備:POR,PWM,溫度傳感器,WDT 輸入/輸出數(shù):21 程序存儲器容量:40KB(20K x 16) 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323
MC68HC705P6AMP 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68HC705P6CDW 制造商:Motorola Inc 功能描述:
MC68HC705P6CP 制造商:Freescale Semiconductor 功能描述: 制造商:Motorola Inc 功能描述: