SLOW V
參數(shù)資料
型號: AT91SAM9XE512-QU
廠商: Atmel
文件頁數(shù): 5/159頁
文件大?。?/td> 0K
描述: MCU ARM9 512K FLASH 208-PQFP
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 24
系列: SAM9XE
核心處理器: ARM9
芯體尺寸: 16/32-位
速度: 180MHz
連通性: EBI/EMI,以太網(wǎng),I²C,MMC,SPI,SSC,UART/USART,USB
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 96
程序存儲(chǔ)器容量: 512KB(512K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 56K x 8
電壓 - 電源 (Vcc/Vdd): 1.65 V ~ 1.95 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 208-MQFP,208-PQFP
包裝: 托盤
配用: AT91SAM9XE-EK-ND - KIT EVAL FOR AT91SAM9XE
AT91SAM-ICE-ND - EMULATOR FOR AT91 ARM7/ARM9
PIC16F62X
DS40300C-page 100
Preliminary
2003 Microchip Technology Inc.
FIGURE 14-11:
EXTERNAL POWER-ON
RESET CIRCUIT (FOR
SLOW VDD POWER-UP)
FIGURE 14-12:
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 1
FIGURE 14-13:
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 2
Note
1: External Power-on Reset circuit is required
only if V
DD power-up slope is too slow. The
diode D helps discharge the capacitor
quickly when V
DD powers down.
2: R < 40 k
is recommended to make sure
that voltage drop across R does not violate
the device’s electrical specification.
3: R1 = 100
to 1 k will limit any current
flowing into MCLR from external capacitor
C in the event of MCLR/V
PP pin breakdown
due to Electrostatic Discharge (ESD) or
Electrical Overstress (EOS).
C
R1
R
D
V
DD
MCLR
PIC16F62X
V
DD
Note
1: This circuit will activate RESET when V
DD
goes below (Vz + 0.7V) where Vz = Zener
voltage.
2: Internal Brown-out Detect Reset circuitry
should be disabled when using this circuit.
V
DD
33k
10k
40k
V
DD
MCLR
PIC16F62X
Vdd x
R1
R1 + R2
= 0.7 V
V
DD
R2
40k
V
DD
MCLR
PIC16F62X
R1
Q1
Note
1:
This Brown-out Circuit is less expensive, albeit
less accurate. Transistor Q1 turns off when V
DD is
below a certain level such that:
2:
Internal Brown-out Detect Reset should be
disabled when using this circuit.
3:
Resistors should be adjusted for the
characteristics of the transistor.
V
DD x
R1
R1 + R2
= 0.7V
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