The POR circuit holds the devi" />
參數(shù)資料
型號(hào): PIC10F322T-I/OT
廠商: Microchip Technology
文件頁(yè)數(shù): 139/210頁(yè)
文件大?。?/td> 0K
描述: MCU 8BIT 896B FLASH SOT23-6
產(chǎn)品培訓(xùn)模塊: 8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝: 1
系列: PIC® 10F
核心處理器: PIC
芯體尺寸: 8-位
速度: 16MHz
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 3
程序存儲(chǔ)器容量: 896B(512 x 14)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 64 x 8
電壓 - 電源 (Vcc/Vdd): 2.3 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 3x8b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: SOT-23-6
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: PIC10F322T-I/OTDKR
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PIC10(L)F320/322
DS41585A-page 34
Preliminary
2011 Microchip Technology Inc.
5.1
Power-on Reset (POR)
The POR circuit holds the device in Reset until VDD has
reached an acceptable level for minimum operation.
Slow rising VDD, fast operating speeds or analog
performance may require greater than minimum VDD.
The PWRT, BOR or MCLR features can be used to
extend the start-up period until all device operation
conditions have been met.
5.1.1
POWER-UP TIMER (PWRT)
The Power-up Timer provides a nominal 64 ms time-
out on POR or Brown-out Reset.
The device is held in Reset as long as PWRT is active.
The PWRT delay allows additional time for the VDD to
rise to an acceptable level. The Power-up Timer is
enabled by clearing the PWRTE bit in Configuration
Word.
The Power-up Timer starts after the release of the POR
and BOR.
For additional information, refer to Application Note
AN607, “Power-up Trouble Shooting” (DS00607).
5.2
Brown-Out Reset (BOR)
The BOR circuit holds the device in Reset when VDD
reaches a selectable minimum level. Between the
POR and BOR, complete voltage range coverage for
execution protection can be implemented.
The Brown-out Reset module has four operating
modes controlled by the BOREN<1:0> bits in Configu-
ration Word. The four operating modes are:
BOR is always on
BOR is off when in Sleep
BOR is controlled by software
BOR is always off
Refer to Table 5-1 for more information.
The Brown-out Reset voltage level is selectable by
configuring the BORV bit in Register 3-1.
A VDD noise rejection filter prevents the BOR from trig-
gering on small events. If VDD falls below VBOR for a
duration greater than parameter TBORDC, the device
will reset. See Figure 5-2 for more information.
TABLE 5-1:
BOR OPERATING MODES
5.2.1
BOR IS ALWAYS ON
When the BOREN bits of Configuration Word are
programmed to ‘11’, the BOR is always on. The device
start-up will be delayed until the BOR is ready and VDD
is higher than the BOR threshold.
BOR protection is active during Sleep. The BOR does
not delay wake-up from Sleep.
5.2.2
BOR IS OFF IN SLEEP
When the BOREN bits of Configuration Word are
programmed to ‘10’, the BOR is on, except in Sleep.
The device start-up will be delayed until the BOR is
ready and VDD is higher than the BOR threshold.
BOR protection is not active during Sleep. The device
wake-up will be delayed until the BOR is ready.
5.2.3
BOR CONTROLLED BY SOFTWARE
When the BOREN bits of Configuration Word are
programmed to ‘01’, the BOR is controlled by the
SBOREN bit of the BORCON register. The device start-
up is not delayed by the BOR ready condition or the
VDD level.
BOR protection begins as soon as the BOR circuit is
ready. The status of the BOR circuit is reflected in the
BORRDY bit of the BORCON register.
BOR protection is unchanged by Sleep.
BOREN<1:0>
SBOREN
Device Mode
BOR Mode
Device Operation upon:
Release of POR/Wake- up from Sleep
11
X
Active
Waits for BOR ready(1)
10
X
Awake
Active
Waits for BOR ready
Sleep
Disabled
01
1
XActive
Begins immediately
0
XDisabled
00
X
XDisabled
Note 1:
Even though this case specifically waits for the BOR, the BOR is already operating, so there is no delay in
start-up.
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