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| 型号： | PCA9698BS,118 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 31/48页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 40B 56HVQFN |
| 产品培训模块： | I²C Bus Fundamentals |
| 特色产品： | NXP - I2C Interface |
| 标准包装： | 1 |
| 接口： | I²C |
| 输入/输出数： | 40 |
| 中断输出： | 是 |
| 频率 - 时钟： | 1MHz |
| 电源电压： | 2.3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 56-VFQFN 裸露焊盘 |
| 供应商设备封装： | 56-HVQFN |
| 包装： | 标准包装 |
| 包括： | POR |
| 产品目录页面： | 826 (CN2011-ZH PDF) |
| 其它名称： | 568-3240-6 |
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37
7810C–AVR–10/12
Atmel ATmega328P [Preliminary]
9.
Power Management and Sleep Modes
Sleep modes enable the application to shut down unused modules in the MCU, thereby saving
power. The AVR provides various sleep modes allowing the user to tailor the power consump-
tion to the application’s requirements.
When enabled, the Brown-out Detector (BOD) actively monitors the power supply voltage during
the sleep periods. To further save power, it is possible to disable the BOD in some sleep modes.
See “BOD Disable” on page 38 for more details.
9.1
Sleep Modes
Figure 8-1 on page 25 presents the different clock systems in the ATmega328P, and their distri-
bution. The figure is helpful in selecting an appropriate sleep mode. Table 9-1 shows the
different sleep modes, their wake up sources BOD disable ability.
Notes:
1. Only recommended with external crystal or resonator selected as clock source.
2. If Timer/Counter2 is running in asynchronous mode.
3. For INT1 and INT0, only level interrupt.
To enter any of the six sleep modes, the SE bit in SMCR must be written to logic one and a
SLEEP instruction must be executed. The SM2, SM1, and SM0 bits in the SMCR Register select
which sleep mode (Idle, ADC Noise Reduction, Power-down, Power-save, Standby, or Extended
Standby) will be activated by the SLEEP instruction. See Table 9-2 on page 42 for a summary.
If an enabled interrupt occurs while the MCU is in a sleep mode, the MCU wakes up. The MCU
is then halted for four cycles in addition to the start-up time, executes the interrupt routine, and
resumes execution from the instruction following SLEEP. The contents of the Register File and
SRAM are unaltered when the device wakes up from sleep. If a reset occurs during sleep mode,
the MCU wakes up and executes from the Reset Vector.
Table 9-1.
Active Clock Domains and Wake-up Sources in the Different Sleep Modes.
Active Clock Domains
Oscillators
Wake-up Sources
Softw
are
BOD
Disab
le
Sleep Mode
clk
CPU
clk
FL
A
S
H
clk
IO
clk
ADC
clk
ASY
Ma
in
Cl
o
c
k
Sourc
e
Enab
led
Timer
Oscillator
Enab
led
INT1,
INT
0
and
Pin
Ch
ang
e
TWI
Ad
dress
Match
Timer2
SPM/EEPR
OM
Re
ady
ADC
WDT
Ot
her/
O
Idle
XXX
X
X
XXX
ADC Noise
Reduction
XX
X
XX(2)
XX
X
Power-down
XX
X
Power-save
X
XX
X
Standby(1)
XX
X
Extended
Standby
XX
X
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| PCA9698DGG | 功能描述:接口-I/O扩展器 I2C I/O EXPANDER GP RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
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| PCA9698DGG/S911-T | 功能描述:接口-I/O扩展器 40BT I2C FM+TPGPIO IN-RS-PU OE RoHS:否 制造商:NXP Semiconductors 逻辑系列: 输入/输出端数量: 最大工作频率:100 kHz 工作电源电压:1.65 V to 5.5 V 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:HVQFN-16 封装:Reel |
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