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參數(shù)資料
| 型號： | PIC16C505 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 14-Pin, 8-Bit CMOS Microcontroller(每個I/O口有25mA驅(qū)動/吸收電流,12個I/O口，帶WDT的微控制器) |
| 中文描述： | 14引腳，8位CMOS微控制器（每個的I / O口有25毫安驅(qū)動/吸收電流，12個的I / O口，帶看門狗的微控制器） |
| 文件頁數(shù)： | 30/80頁 |
| 文件大?。?/td> | 617K |
| 代理商： | PIC16C505 |
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PIC16C505
DS40192A-page 30
Preliminary
1998 Microchip Technology Inc.
7.2.5
INTERNAL 4 MHz RC OSCILLATOR
The internal RC oscillator provides a fixed 4 MHz (nom-
inal) system clock at VDD = 5V and 25
°
C, see “Electri-
cal Specifications” section for information on variation
over voltage and temperature..
In addition, a calibration instruction is programmed into
the last address of memory which contains the calibra-
tion value for the internal RC oscillator. This location is
always uncode protected regardless of the code pro-
tect settings. This value is programmed as a
MOVLW XX
instruction where XX is the calibration value, and is
placed at the reset vector. This will load the W register
with the calibration value upon reset and the PC will
then roll over to the users program at address 0x000.
The user then has the option of writing the value to the
OSCCAL Register (05h) or ignoring it.
OSCCAL, when written to with the calibration value, will
“trim” the internal oscillator to remove process variation
from the oscillator frequency. .
For the PIC16C505, only bits <7:2> of OSCCAL are
implemented.
7.3
RESET
The device differentiates between various kinds of
reset:
a) Power on reset (POR)
b) MCLR reset during normal operation
c) MCLR reset during SLEEP
d) WDT time-out reset during normal operation
e) WDT time-out reset during SLEEP
f) Wake-up from SLEEP on pin change
Some registers are not reset in any way; they are
unknown on POR and unchanged in any other reset.
Most other registers are reset to “reset state” on power-
on reset (POR), on MCLR, WDT or wake-up on pin
change reset during normal operation. They are not
affected by a WDT reset during SLEEP or MCLR reset
during SLEEP, since these resets are viewed as
resumption of normal operation. The exceptions to this
are TO, PD, and RBWUF bits. They are set or cleared
differently in different reset situations. These bits are
used in software to determine the nature of reset. See
Table 7-3 for a full description of reset states of all
registers.
Note:
Please note that erasing the device will
also erase the pre-programmed internal
calibration value for the internal oscillator.
The calibration value must be read prior to
erasing the part. so it can be repro-
grammed correctly later.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PIC16C505/JW | 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 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 |
| PIC16C505-04/P | 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 4MHz PDIP14 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 |
| PIC16C505-04/P | 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU (TUBE 30) 16C505 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 16C505 DIP14 |
| PIC16C505-04/SL | 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 4MHz SOIC14 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 |
| PIC16C505-04/SL | 制造商:Microchip Technology Inc 功能描述:8BIT CMOS MCU SMD 16C505 SOIC14 |
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