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參數(shù)資料
| 型號： | PIC10F220 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 6-Pin, 8-Bit Flash Microcontrollers |
| 中文描述： | 6引腳，8位閃存微控制器 |
| 文件頁數(shù)： | 36/78頁 |
| 文件大?。?/td> | 583K |
| 代理商： | PIC10F220 |
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PIC10F220/222
DS41270B-page 34
Preliminary
2006 Microchip Technology Inc.
8.2
Oscillator Configurations
8.2.1
OSCILLATOR TYPES
The PIC10F220/222 devices are offered with internal
oscillator mode only.
INTOSC: Internal 4/8 MHz Oscillator
8.2.2
INTERNAL 4/8 MHz OSCILLATOR
The internal oscillator provides a 4/8 MHz (nominal)
system clock (see
Section 10.0 “Electrical Charac-
teristics”
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 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.
8.3
Reset
The device differentiates between various kinds of
Reset:
Power-on Reset (POR)
MCLR Reset during normal operation
MCLR Reset during Sleep
WDT Time-out Reset during normal operation
WDT Time-out Reset during Sleep
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), 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 GPWUF 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 8-1 for a full description of Reset states of all
registers.
TABLE 8-1:
RESET CONDITIONS FOR REGISTERS – PIC10F220/222
Note:
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 reprogrammed correctly
later.
Register
Address
Power-on Reset
MCLR Reset, WDT Time-out, Wake-up On Pin Change,
W
INDF
TMR0
PC
—
00h
01h
02h
qqqq qqqu
(1)
qqqq qqqu
(1)
xxxx xxxx
uuuu uuuu
xxxx xxxx
uuuu uuuu
1111 1111
1111 1111
STATUS
FSR
OSCCAL
GPIO
ADCON0
ADRES
OPTION
TRIS
Legend:
Note
03h
04h
05h
06h
07h
08h
—
—
0--1 1xxx
q00q quuu
111x xxxx
111u uuuu
1111 1110
uuuu uuuu
---- xxxx
---- uuuu
11-- 1100
11-- 1100
xxxx xxxx
uuuu uuuu
1111 1111
1111 1111
---- 1111
---- 1111
u
= unchanged,
x
= unknown, – = unimplemented bit, read as ‘
0
’,
q
= value depends on condition.
Bits <7:2> of W register contain oscillator calibration values due to
MOVLW XX
instruction at top of memory.
1:
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| PIC10F220-E/OT | 功能描述:8位微控制器 -MCU 384B Flash 16B RAM 4 I/O 8bit ADC 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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