參數(shù)資料
型號(hào): MC68HC11G7CFN
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC84
封裝: PLASTIC, LCC-84
文件頁(yè)數(shù): 140/195頁(yè)
文件大?。?/td> 1940K
代理商: MC68HC11G7CFN
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INPUT/OUTPUT PORTS
4-11
4.12
PORT J
Port J is a general purpose 4-bit I/O port which also supports some of the timer functions (see
SECTION 6: PROGRAMMABLE TIMER, REAL TIME INTERRUPT AND PULSE
ACCUMULATOR). Two of the pins are used for input capture/output compare. One of the pins is
used as a clock input for the timer counter registers. The one remaining pin is for general purpose
I/O. Any channels not used for timers may be used as general purpose I/O.
Bit 0 of Port J is used as the TCK input or for general purpose I/O. The data direction is always under
the control of DDRJ bit 0, whether TCK is enabled or not. If the pin is configured as an output by DDRJ
bit 0, the output data in Port J bit 0 becomes the input data to TCK.
Bits 1 and 2 of Port J is used for output compare or input capture or as general purpose I/O. If the
associated output compare is not enabled, the data directions of these pins are dependent on DDRJ
bits 1 and 2. If an output compare is enabled, the associated pin is configured automatically as an
output. If a pin is programmed as an output and input capture is enabled, the output data becomes
the input data to the input capture.
Bit 3 of Port J is a general purpose I/O pin and the data direction of the pin is determined by the state
of DDRJ bit 3. All DDRJ bits are cleared at reset.
4.12.1
Data Register (PORTJ)
0
PJ3
PJ2
PJ1
PJ0
PORTJ
$1031
7
6
5
4
3
2
1
0
RESET:
Alternate Pin Function:
O7/I6
O6/I5
TCK
READ:
Any time (inputs return pin levels, outputs return pin driver input levels).
WRITE:
Data stored in an internal latch (drives pins only if configured as outputs).
RESET:
General purpose high impedance inputs ($00).
4.12.2
Data Direction Register (DDRJ)
0
DDJ3
DDJ2
DDJ1
DDJ0
DDRJ
$1032
7
6
5
4
3
2
1
0
RESET:
READ:
Any time.
WRITE:
Any time.
RESET:
$00 (all general purpose I/O configured for input only).
0 – Bits set to zero configure the corresponding I/O pins as inputs.
1 – Bits set to one configure the corresponding I/O pins as outputs.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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MC68HC11K0CFNE3 功能描述:8位微控制器 -MCU 8B MCU 768 RAM - EPP 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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