參數(shù)資料
型號： MC68HC705C9AP
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP40
封裝： PLASTIC, DIP-40
文件頁數(shù)： 144/177頁
文件大?。?/td> 1941K
代理商： MC68HC705C9AP
MC68HC705C9A — Rev. 4.0
Advance Information
MOTOROLA
Input/Output (I/O) Ports
69
Advance Information — MC68HC705C9A
Section 7. Input/Output (I/O) Ports
7.1 Contents
7.2 Introduction
This section briefly describes the 31 input/output (I/O) lines arranged as
one 7-bit and three 8-bit ports. All of these port pins are programmable
as either inputs or outputs under software control of the data direction
registers.
NOTE:
To avoid a glitch on the output pins, write data to the I/O port data
register before writing a one to the corresponding data direction register.
7.3 Port A
Port A is an 8-bit bidirectional port which does not share any of its pins
with other subsystems. The port A data register is at $0000 and the data
direction register (DDR) is at $0004. The contents of the port A data
register are indeterminate at initial powerup and must be initialized by
user software. Reset does not affect the data registers, but clears the
data direction registers, thereby returning the ports to inputs. Writing a 1
to a DDR bit sets the corresponding port bit to output mode. A block
diagram of the port logic is shown in Figure 7-1.
相關(guān)PDF資料
PDF描述
MC68HC705C9AFB 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP44
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC705C9AVFNE 功能描述:8位微控制器 -MCU 8B MCU 352 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
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MC68HC705G1B 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68HC705J1A 制造商:Freescale Semiconductor 功能描述:
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