參數(shù)資料
型號(hào)： MB91F267APMC-GE1
廠商： Fujitsu Semiconductor America Inc
文件頁(yè)數(shù)： 18/53頁(yè)
文件大?。?/td> 0K
描述： IC MCU FLASH 128KB FLASH 64LQFP
標(biāo)準(zhǔn)包裝： 1
系列： FR MB91265A
核心處理器： FR60Lite RISC
芯體尺寸： 32-位
速度： 33MHz
連通性： UART/USART
外圍設(shè)備： DMA，WDT
輸入/輸出數(shù)： 49
程序存儲(chǔ)器容量： 128KB（128K x 8）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 4K x 8
電壓 - 電源 (Vcc/Vdd)： 4 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 11x8/10b
振蕩器型： 外部
工作溫度： -40°C ~ 105°C
封裝/外殼： 64-LQFP
包裝： 托盤
其它名稱： 865-1092
28
8183F–AVR–06/12
ATtiny24A/44A/84A
6.2.4
Low-Frequency Crystal Oscillator
To use a 32.768 kHz watch crystal as the clock source for the device, the Low-frequency Crystal
Oscillator must be selected by setting CKSEL fuses to ‘0110’. The crystal should be connected
as shown in Figure 6-3. To find suitable capacitors please consult the manufacturer’s datasheet.
For this oscillator start-up times can be set with the SUT fuses, as shown in Table 6-7.
Notes:
1. These options should be used only if frequency stability at start-up is not important.
The Low-frequency Crystal Oscillator provides an internal load capacitance, see Table 6-8 at
each TOSC pin.
6.2.5
Crystal Oscillator / Ceramic Resonator
XTAL1 and XTAL2 are input and output, respectively, of an inverting amplifier which can be con-
figured for use as an On-chip Oscillator, as shown in Figure 6-3 Either a quartz crystal or a
ceramic resonator may be used.
Figure 6-3.
Crystal Oscillator Connections
C1 and C2 should always be equal for both crystals and resonators. The optimal value of the
capacitors depends on the crystal or resonator in use, the amount of stray capacitance, and the
electromagnetic noise of the environment. Some initial guidelines for choosing capacitors for
Table 6-7.
Start-up Times for the Low Frequency Crystal Oscillator Clock Selection
SUT[1:0]
Start-up Time
from Power Down
Additional Delay
from Reset
Recommended usage
00
4 ms
Fast rising power or BOD enabled
01
64 ms
Slowly rising power
10
32K CK
64 ms
Stable frequency at start-up
11
Reserved
Table 6-8.
Capacitance of Low-Frequency Crystal Oscillator
Device
32 kHz Osc. Type
Cap (Xtal1/Tosc1)
Cap (Xtal2/Tosc2)
ATtiny24A/44A/84A
System Osc.
16 pF
6 pF
XTAL2
XTAL1
GND
C2
C1
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參數(shù)描述
MB91F267APMC-GS 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontrollers
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MB91F267N 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontroller
MB91F267NA 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontrollers
MB91F267NAPMC-G 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32-bit Proprietary Microcontrollers
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