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参数资料
| 型号： | MC68HC705P6ACP |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP28 |
| 封装： | PLASTIC, DIP-28 |
| 文件页数： | 33/98页 |
| 文件大小： | 532K |
| 代理商： | MC68HC705P6ACP |
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Port D
MC68HC705P6A Advance Information Data Sheet, Rev. 2.1
Freescale Semiconductor
39
Figure 6-3. Port C I/O Circuitry
6.5 Port D
Port D is a 2-bit port with one bidirectional pin (PD5) and one input-only pin (PD7). Pin PD7 is shared with
the 16-bit timer. The port D data register is located at address $0003 and its data direction register (DDR)
is located at address $0007. The contents of the port D data register are indeterminate at initial powerup
and must be initialized by user software. Reset does not affect the data registers, but clears the DDRs,
thereby setting PD5 to input mode. Writing a 1 to DDR bit 5 sets PD5 to output mode (see Figure 6-4).
Port D may be used for general I/O applications regardless of the state of the 16-bit timer. Since PD7 is
an input-only line, its state can be read from the port D data register at any time.
Figure 6-4. Port D I/O Circuitry
6.6 I/O Port Programming
Each pin on port A through port D (except pin 7 of port D) can be programmed as an input or an output
under software control as shown in Table 6-1, Table 6-2, Table 6-3, and Table 6-4. The direction of a pin
is determined by the state of its corresponding bit in the associated port data direction register (DDR). A
pin is configured as an output if its corresponding DDR bit is set to a logic 1. A pin is configured as an
input if its corresponding DDR bit is cleared to a logic 0.
READ $0002
WRITE $0002
READ $0006
DATA
REGISTER BIT
I/O
PIN
OUTPUT
INTERNAL HC05
DATA BUS
RESET
(RST)
WRITE $0006
DATA DIRECTION
REGISTER BIT
READ $0003
WRITE $0003
READ $0007
DATA
REGISTER BIT
I/O
PIN
OUTPUT
INTERNAL HC05
DATA BUS
RESET
(RST)
WRITE $0007
DATA DIRECTION
REGISTER BIT
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 标准包装:250 系列:56F8xxx 核心处理器:56800E 芯体尺寸:16-位 速度:60MHz 连通性:CAN，SCI，SPI 外围设备:POR，PWM，温度传感器，WDT 输入/输出数:21 程序存储器容量:40KB（20K x 16） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:6K x 16 电压 - 电源 (Vcc/Vdd):2.25 V ~ 3.6 V 数据转换器:A/D 6x12b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:48-LQFP 包装:托盘 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: |
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