參數(shù)資料
型號(hào)： SB80C188EC20
廠商： INTEL CORP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, 20 MHz, MICROPROCESSOR, PQFP100
封裝： SHRINK, QFP-100
文件頁(yè)數(shù)： 35/57頁(yè)
文件大?。?/td> 1573K
代理商： SB80C188EC20
80C186EC188EC 80L186EC188EC
DERATING CURVES
272434 – 13
Figure 14 Typical Output Delay Variations versus Load Capacitance
272434 – 14
Figure 15 Typical Rise and Fall Variations versus Load Capacitance
RESET
The processor will perform a reset operation any
time the RESIN pin is active The RESIN pin is syn-
chronized before it is presented internally which
means that the clock must be operating before a
reset can take effect From a power-on state RESIN
must be held active (low) in order to guarantee cor-
rect initialization of the processor Failure to pro-
vide RESIN while the device is powering up will
result in unspecified operation of the device
Figure 16 shows the correct reset sequence when
first applying power to the processor An external
clock connected to CLKIN must not exceed the VCC
threshold being applied to the processor This is nor-
mally not a problem if the clock driver is supplied
with the same VCC that supplies the processor
When attaching a crystal to the device RESIN must
remain active until both VCC and CLKOUT are stable
(the length of time is application specific and de-
pends on the startup characteristics of the crystal
circuit) The RESIN pin is designed to operate cor-
rectly using a RC reset circuit but the designer must
ensure that the ramp time for VCC is not so long that
RESIN is never sampled at a logic low level when
VCC reaches minimum operating conditions
Figure 17 shows the timing sequence when RESIN
is applied after VCC is stable and the device has
been operating Note that a reset will terminate all
activity and return the processor to a known operat-
ing state Any bus operation that is in progress at the
time RESIN is asserted will terminate immediately
(note that most control signals will be driven to their
inactive state first before floating)
While
RESIN
is
active
bus
signals
LOCK
A19S16ONCE and A1816 are configured as in-
puts and weakly held high by internal pullup transis-
tors Only A19ONCE can be overdriven to a low
and is used to enable the ONCE Mode Forcing
LOCK or A1816 low at any time while RESIN is low
is prohibited and will cause unspecified device oper-
ation
40
相關(guān)PDF資料
PDF描述
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SB80L186EB8 16-BIT, 8 MHz, MICROPROCESSOR, PQFP80
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SB80C188EC-20 制造商:未知廠家 制造商全稱:未知廠家 功能描述:16-Bit Microprocessor
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SB80C188EC-25 制造商:未知廠家 制造商全稱:未知廠家 功能描述:16-Bit Microprocessor
SB80C188XL12 功能描述:IC MPU 16-BIT 5V 12MHZ 80-SQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:- 標(biāo)準(zhǔn)包裝:2 系列:MPC8xx 處理器類型:32-位 MPC8xx PowerQUICC 特點(diǎn):- 速度:133MHz 電壓:3.3V 安裝類型:表面貼裝 封裝/外殼:357-BBGA 供應(yīng)商設(shè)備封裝:357-PBGA（25x25） 包裝:托盤
SB80C188XL20 功能描述:IC MPU 16-BIT 5V 20MHZ 80-SQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:- 標(biāo)準(zhǔn)包裝:2 系列:MPC8xx 處理器類型:32-位 MPC8xx PowerQUICC 特點(diǎn):- 速度:133MHz 電壓:3.3V 安裝類型:表面貼裝 封裝/外殼:357-BBGA 供應(yīng)商設(shè)備封裝:357-PBGA（25x25） 包裝:托盤
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