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| 型號： | MC68HCP11A1CFN3 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | HCMOS Single-Chip Microcontroller |
| 中文描述： | 8-BIT, EEPROM, 3 MHz, MICROCONTROLLER, PQCC52 |
| 封裝： | PLASTIC, LCC-52 |
| 文件頁數(shù)： | 39/158頁 |
| 文件大小： | 776K |
| 代理商： | MC68HCP11A1CFN3 |
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MC68HC11A8
TECHNICAL DATA
PARALLEL I/O
MOTOROLA
4-1
4
4 PARALLEL I/O
The MC68HC11A8 has 40 I/O pins arranged as five 8-bit ports. All of these pins serve
multiple functions depending on the operating mode and data in the control registers.
This section explains the operation of these pins only when they are used for parallel
l/O.
Ports C and D are used as general purpose input and/or output pins under direct con-
trol of their respective data direction registers. Ports A, B, and E, with the exception of
port A pin 7, are fixed direction inputs or outputs and therefore do not have data direc-
tion registers. Port B, port C, the STRA pin, and the STRB pin are used for strobed
and/or handshake modes of parallel l/O, as well as general purpose l/O.
4.1 General-Purpose I/O (Ports C and D)
Each port l/O line has an associated bit in a specific port data register and port data
direction register. The data direction register bits are used to specify the primary direc-
tion of data for each l/O line. When an output line is read, the value at the input to the
pin driver is returned. When a line is configured as an input, that pin becomes a high-
impedance input. If a write is executed to an input line, the value does not affect the l/
O pin, but is stored in an internal latch. When the line becomes an output, this value
appears at the l/O pin. Data direction register bits are cleared by reset to configure l/
O pins as inputs.
The AS and R/W pins are dedicated to bus control while in the expanded multiplexed
operating modes, or parallel l/O strobes (STRA and STRB) while in the single chip op-
erating modes.
4.2 Fixed Direction I/O (Ports A, B, and E)
The lines for ports A, B, and E (except for port A bit 7) have fixed data directions. When
port A is being used for general purpose l/O, bits 0, 1, and 2 are configured as input
only and writes to these lines have no effect. Bits 3, 4, 5, and 6 of port A are configured
as output only and reads of these lines return the levels sensed at the input to the line
drivers. Port A bit 7 can be configured as either a general-purpose input or output us-
ing the DDRA7 bit in the pulse accumulator control register. When port B is being used
for general purpose output, it is configured as output only and reads of these lines will
return the levels sensed at the input of the pin drivers. Port E contains the eight A/D
channel inputs, but these lines may also be used as general purpose digital inputs.
Writes to the port E address have no effect.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HCP11A1FN | 制造商:MOTORALA 功能描述: |
| MC68HCP11E0CP2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HCP11E0FN | 功能描述:MICROCONTROLLER MCU 8ADC 3MHC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC11 標準包裝: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)轉換器:A/D 6x12b 振蕩器型:內部 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 |
| MC68HCP11E0FNE | 功能描述:8位微控制器 -MCU 8B MCU 512RAM COP A/D 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 安裝風格:SMD/SMT |
| MC68HCP11E1CFNE2 | 功能描述:8位微控制器 -MCU 8B MCU 512 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 安裝風格:SMD/SMT |
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