參數(shù)資料
型號： 24C02SC
廠商： Microchip Technology Inc.
英文描述： 2K 5.0V IIC serial EEPROMs(2.5V~5.5V,2K位,1M次擦寫周期,ISO7816標準)
中文描述： 2K 5.0V國際進口電壓（2.5V?5.5V的和2K位，100萬次擦寫周期，符合ISO7816標準串行EEPROM）
文件頁數(shù)： 99/170頁
文件大?。?/td> 4191K
代理商： 24C02SC
2003 Microchip Technology Inc.
Preliminary
DS40300C-page 97
PIC16F62X
14.5.5
TIMEOUT SEQUENCE
On power-up the timeout sequence is as follows: First
PWRT timeout is invoked after POR has expired. Then
OST is activated. The total timeout will vary based on
oscillator configuration and PWRTE bit status. For
example, in ER mode with PWRTE bit erased (PWRT
disabled), there will be no timeout at all. Figure 14-8,
Figure 14-9
and
Figure 14-10
sequences.
depict
timeout
Since the timeouts occur from the POR pulse, if MCLR
is kept low long enough, the timeouts will expire. Then
bringing MCLR high will begin execution immediately
(see Figure 14-9). This is useful for testing purposes or
to synchronize more than one PIC16F62X device
operating in parallel.
Table 14-7 shows the RESET conditions for some
special registers, while Table 14-8 shows the RESET
conditions for all the registers.
14.5.6
POWER CONTROL (PCON) STATUS
REGISTER
The Power Control/STATUS register, PCON (address
8Eh) has two bits.
Bit0 is BOD (Brown-out). BOD is unknown on Power-
on Reset. It must then be set by the user and checked
on subsequent RESETS to see if BOD = 0 indicating
that a brown-out has occurred. The BOD STATUS bit is
a don’t care and is not necessarily predictable if the
brown-out circuit is disabled (by setting BODEN bit = 0
in the Configuration word).
Bit1 is POR (Power-on Reset). It is a ‘0’ on Power-on
Reset and unaffected otherwise. The user must write a
‘1’ to this bit following a Power-on Reset. On a
subsequent RESET if POR is ‘0’, it will indicate that a
Power-on Reset must have occurred (V
DD
may have
gone too low).
TABLE 14-4:
TIMEOUT IN VARIOUS SITUATIONS
TABLE 14-5:
STATUS/PCON BITS AND THEIR SIGNIFICANCE
TABLE 14-6:
SUMMARY OF REGISTERS ASSOCIATED WITH BROWN-OUT
Oscillator Configuration
Power-up
Brown-out Detect
Reset
Wake-up
from SLEEP
PWRTE = 0
PWRTE = 1
XT, HS, LP
72 ms + 1024 T
OSC
1024 T
OSC
72 ms + 1024 T
OSC
1024 T
OSC
ER, INTRC, EC
72 ms
—
72 ms
—
POR
BOD
TO
PD
0
X
1
1
Power-on Reset
0
X
0
X
Illegal, TO is set on POR
0
X
X
0
Illegal, PD is set on POR
1
0
X
X
Brown-out Detect Reset
1
1
0
u
WDT Reset
1
1
0
0
WDT Wake-up
1
1
u
u
MCLR Reset during normal operation
1
1
1
0
MCLR Reset during SLEEP
Legend: u = unchanged, x = unknown.
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR Reset
Value on all
other
RESETS
(1)
03h
STATUS
IRP
RP1
RPO
TO
PD
Z
DC
C
0001 1xxx
000q quuu
8Eh
PCON
—
—
—
—
OSCF
Reset
POR
BOD
---- 1-0x
---- u-uq
Note
1:
Other (non Power-up) Resets include MCLR Reset, Brown-out Detect Reset and Watchdog Timer Reset during normal opera-
tion.
相關PDF資料
PDF描述
24C02A 2K 5.0V CMOS serial EEPROMs(2K位,5.0V,IIC串行EEPROM)
24C02C 2K 5.0V IIC serial EEPROMs(2K位，1M次擦寫周期，硬件寫保護，二線串行接口,EEPROM)
24C02C-EP 2K 5.0V I 2 C ⑩ Serial EEPROM
24C02C-ESN 2K 5.0V I 2 C ⑩ Serial EEPROM
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相關代理商/技術參數(shù)
參數(shù)描述
24C02SC/S 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SERIAL EEPROM|256X8|CMOS|DIE
24C02SC-/S 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:1K/2K 5.0V I2C Serial EEPROMs for Smart Cards
24C02SC/S08 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SERIAL EEPROM|256X8|CMOS|DIE
24C02SC-/S08 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:1K/2K 5.0V I2C Serial EEPROMs for Smart Cards
24C02SC/W 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SERIAL EEPROM|256X8|CMOS|WAFER
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