參數(shù)資料
型號： MC68HC705BD3
廠商： Motorola, Inc.
英文描述： 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述： 8位微控制器單元（MCU）。（8位微控制器）
文件頁數(shù)： 24/112頁
文件大小： 676K
代理商： MC68HC705BD3
MOTOROLA
2-4
MC68HC05BD3
PIN DESCRIPTION AND I/O PORTS
2
2.3.3
Port C
Port C is an 8-bit bidirectional port which shares pins with PWM and SSP subsystem. See
Section 6 for a detailed description of PWM and Section 8 for a detailed description of SSP. These
pins are configured to PWM output when the corresponding bits in the Configuration register 1 are
set, except PC6 and PC7. PC6 and PC7 are configured to SSP outputs when the corresponding
bits in the Configuration register 2 are set. The Port C data register is at $02 and the data direction
register (DDR) is at $06. Reset does not affect the data register, but clears the data direction
register, thereby returning the ports to inputs. Writing a one to a DDR bit sets the corresponding
port bit to output mode.
2.3.4
Port D
Port D is a 2-bit bidirectional port which shares pins with M-Bus subsystem. See Section 7 for a
detailed description of M-Bus. These pins are configured to the corresponding functions when the
corresponding bits in the Configuration register 2 are set. They are +5V open-drain I/O pins when
used as M-Bus I/O. The Port D data register is at $03 and the data direction register (DDR) is at
$07. Reset does not affect the data register, yet clears the data direction register, thereby returning
the ports to inputs. Writing a one to a DDR bit sets the corresponding port bit to output mode.
2.3.5
Input/Output Programming
Bidirectional port lines may be programmed as an input or an output under software control. The
direction of the pins is determined by the state of the corresponding bit in the port data direction
register (DDR). Each port has an associated DDR. Any I/O port pin is configured as an output if
its corresponding DDR bit is set. A pin is configured as an input if its corresponding DDR bit is
cleared.
During Reset, all DDRs are cleared, which configure all port pins as inputs. The data direction
registers are capable of being written to or read by the processor. During the programmed output
state, a read of the data register actually reads the value of the output data latch and not the I/O
pin.
Table 2-1
I/O Pin Functions
R/W
0
0
1
1
DDR
0
1
0
1
I/O Pin Function
The I/O pin is in input mode. Data is written into the output data latch.
Data is written into the output data latch and output to the I/O pin.
The state of the I/O pin is read.
The I/O pin is in an output mode. The output data latch is read.
TPG
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC705BD3P 制造商:Motorola 功能描述:MOTOROLA NXC4C
MC68HC705BD7P1 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68HC705C4ACP 制造商:Freescale Semiconductor 功能描述:
MC68HC705C8AB 功能描述:IC MCU 8K OTP 2.1MHZ 42-SDIP 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
MC68HC705C8ACB 制造商:Rochester Electronics LLC 功能描述:HCO5 CORE + 8K RAM + EPR - Bulk
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