V
參數(shù)資料
型號: AT90S8535-8PI
廠商: Atmel
文件頁數(shù): 85/127頁
文件大?。?/td> 0K
描述: IC MCU 8K FLSH 8MHZ A/D IT 40DIP
標(biāo)準(zhǔn)包裝: 18
系列: AVR® 90S
核心處理器: AVR
芯體尺寸: 8-位
速度: 8MHz
連通性: SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 8KB(4K x 16)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 512 x 8
RAM 容量: 512 x 8
電壓 - 電源 (Vcc/Vdd): 4 V ~ 6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 40-DIP(0.600",15.24mm)
包裝: 管件
PIC16C71X
DS30272A-page 60
1997 Microchip Technology Inc.
FIGURE 8-14: EXTERNAL POWER-ON
RESET CIRCUIT (FOR SLOW
VDD POWER-UP)
Note 1: External Power-on Reset circuit is
required only if VDD power-up slope is too
slow. The diode D helps discharge the
capacitor quickly when VDD powers down.
2: R < 40 k
is recommended to make sure
that voltage drop across R does not violate
the device’s electrical specication.
3: R1 = 100
to 1 k will limit any current
owing into MCLR from external capacitor
C in the event of MCLR/VPP pin break-
down due to Electrostatic Discharge
(ESD) or Electrical Overstress (EOS).
C
R1
R
D
VDD
MCLR
PIC16CXX
FIGURE 8-15: EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 1
FIGURE 8-16: EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 2
Note 1: This circuit will activate reset when VDD
goes below (Vz + 0.7V) where Vz = Zener
voltage.
2: Internal brown-out detection on the
PIC16C710/711/715 should be disabled
when using this circuit.
3: Resistors should be adjusted for the char-
acteristics of the transistor.
VDD
33k
10k
40k
VDD
MCLR
PIC16CXX
Note 1: This brown-out circuit is less expensive,
albeit less accurate. Transistor Q1 turns
off when VDD is below a certain level
such that:
2: Internal brown-out detection on the
PIC16C710/711/715 should be disabled
when using this circuit.
3: Resistors should be adjusted for the
characteristics of the transistor.
VDD
R1
R1 + R2
= 0.7V
VDD
R2
40k
VDD
MCLR
PIC16CXX
R1
Q1
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