參數(shù)資料
型號(hào): PCA9698BS,118
廠商: NXP Semiconductors
文件頁(yè)數(shù): 21/48頁(yè)
文件大?。?/td> 0K
描述: IC I/O EXPANDER I2C 40B 56HVQFN
產(chǎn)品培訓(xùn)模塊: I²C Bus Fundamentals
特色產(chǎn)品: NXP - I2C Interface
標(biāo)準(zhǔn)包裝: 1
接口: I²C
輸入/輸出數(shù): 40
中斷輸出:
頻率 - 時(shí)鐘: 1MHz
電源電壓: 2.3 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 56-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 56-HVQFN
包裝: 標(biāo)準(zhǔn)包裝
包括: POR
產(chǎn)品目錄頁(yè)面: 826 (CN2011-ZH PDF)
其它名稱: 568-3240-6
28
7810C–AVR–10/12
Atmel ATmega328P [Preliminary]
Figure 8-2.
Crystal Oscillator Connections
The Low Power Oscillator can operate in three different modes, each optimized for a specific fre-
quency range. The operating mode is selected by the fuses CKSEL3..1 as shown in Table 8-3
Notes:
1. .This option should not be used with crystals, only with ceramic resonators.
2. If 8 MHz frequency exceeds the specification of the device (depends on VCC), the CKDIV8
Fuse can be programmed in order to divide the internal frequency by 8. It must be ensured
that the resulting divided clock meets the frequency specification of the device.
The CKSEL0 Fuse together with the SUT1..0 Fuses select the start-up times as shown in Table
Table 8-3.
Low Power Crystal Oscillator Operating Modes(2)
Frequency Range
(MHz)
Recommended Range for
Capacitors C1 and C2 (pF)
CKSEL3..1
0.4 - 0.9
0.9 - 3.0
12 - 22
101
3.0 - 8.0
12 - 22
110
8.0 - 16.0
12 - 22
111
Table 8-4.
Start-up Times for the Low Power Crystal Oscillator Clock Selection
Oscillator Source /
Power Conditions
Start-up Time from
Power-down and
Power-save
Additional Delay
from Reset
(VCC = 5.0V)
CKSEL0
SUT1..0
Ceramic resonator, fast
rising power
258 CK
14CK + 4.1 ms(1)
000
Ceramic resonator, slowly
rising power
258 CK
14CK + 65 ms(1)
001
Ceramic resonator, BOD
enabled
1K CK
14CK(2)
010
Ceramic resonator, fast
rising power
1K CK
14CK + 4.1 ms(2)
011
Ceramic resonator, slowly
rising power
1K CK
14CK + 65 ms(2)
100
XTAL2 (TOSC2)
XTAL1 (TOSC1)
GND
C2
C1
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