參數(shù)資料
型號: PIC16LF872T-I/SS
廠商: Microchip Technology
文件頁數(shù): 98/167頁
文件大小: 0K
描述: IC MCU FLASH 2KX14 EE A/D 28SSOP
產(chǎn)品培訓模塊: Asynchronous Stimulus
標準包裝: 2,100
系列: PIC® 16F
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
連通性: I²C,SPI
外圍設備: 欠壓檢測/復位,POR,PWM,WDT
輸入/輸出數(shù): 22
程序存儲器容量: 3.5KB(2K x 14)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 64 x 8
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 2.2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 5x10b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 28-SSOP(0.209",5.30mm 寬)
包裝: 帶卷 (TR)
36
8048C–AVR–02/12
ATtiny43U
Figure 8-2.
Typical Connection of Boost Converter.
When the boost converter is not connected the microcontroller can be powered directly from an
external source and is then subject to the standard supply voltage limits defined in “Electrical
It is recommended to use the Brown-out Detection (BOD) circuit only with the lowest BOD level
(1.8V), when using the integrated boost converter. This is because supply voltage of the micro-
controller can drop to lowest BOD levels during regular operation. See “Brown-out Detection” on
8.2
Modes of Operation
The boost converter has three main modes of operation; Stop, Start, and Active. Operation
begins from Stop Mode and is transferred to Start Mode when input voltage, V
BAT, is sufficiently
high for stable operation. When the converter has managed to raise the output voltage, V
CC, to a
sustainable level control is then transferred to the main mode of operation, Active Mode.
The modes of operation are illustrated in Figure 8-3, below.
Figure 8-3.
Operating Modes of Boost Converter.
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
VCC
GND
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
VBAT
LSW
C3
C1
L1
D1
VIN
START
MODE
STOP
MODE
V
B
A
T
<
V S
TO
P
FIR
M
W
AR
E
V
B
A
T
>
V
S
T
A
R
T
V
B
A
T
<
V
S
T
O
P
VCC < VBO
OST
V
CC >
V
BOOST
ENTRY
REGULATED
LOW CURRENT
f(
I L
O
A
D
)
ACTIVE
MODE
f(
I
L
O
A
D
)
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