Figure 1. MCU Start-up, RESET Tied to VCC Figure 2. MCU Start-u" />
參數(shù)資料
型號: SC16C654DBIB64,157
廠商: NXP Semiconductors
文件頁數(shù): 47/58頁
文件大?。?/td> 0K
描述: IC QUAD UART 64BYTE 64LQFP
標(biāo)準(zhǔn)包裝: 800
通道數(shù): 4,QUART
FIFO's: 64 字節(jié)
電源電壓: 2.5V,3.3V,5V
帶自動流量控制功能:
帶IrDA 編碼器/解碼器:
帶故障啟動位檢測功能:
帶調(diào)制解調(diào)器控制功能:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 64-LQFP
供應(yīng)商設(shè)備封裝: 64-LQFP(10x10)
包裝: 托盤
其它名稱: 935276671157
SC16C654DBIB64
SC16C654DBIB64-ND
51
7674F–AVR–09/09
ATmega164P/324P/644P
Figure 1. MCU Start-up, RESET Tied to VCC
Figure 2. MCU Start-up, RESET Extended Externally
Table 1. Power On Reset Specifications
Note:
1. Before rising, the supply has to be between
V
PORMIN and VPORMAX to ensure a Reset.
9.0.4
External Reset
An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the
minimum pulse width (see “System and Reset Characteristics” on page 332) will generate a
reset, even if the clock is not running. Shorter pulses are not guaranteed to generate a reset.
When the applied signal reaches the Reset Threshold Voltage – V
RST – on its positive edge, the
delay counter starts the MCU after the Time-out period – t
TOUT – has expired.
Symbol
Parameter
Min
Typ
Max
Units
V
POT
Power-on Reset Threshold Voltage (rising)
1.1
1.4
1.7
V
Power-on Reset Threshold Voltage (falling)(1)
0.8
1.3
1.6
V
VPORMAX
VCC Max. start voltage to ensure internal
Power-on Reset signal
0.4
V
VPORMIN
VCC Min. start voltage to ensure internal
Power-on Reset signal
-0.1
V
VCCRR
VCC Rise Rate to ensure Power-on Reset
0.01
V/ms
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
RST
V
PORMA
X
VCC
CCRR
V
PORMIN
RESET
TIME-OUT
INTERNAL
RESET
tTOUT
VRST
VCC
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