參數(shù)資料
型號: UCB1100LP
廠商: NXP Semiconductors N.V.
英文描述: Advanced modem/audio analog front-end
中文描述: 先進的調(diào)制解調(diào)器/音頻模擬前端
文件頁數(shù): 28/36頁
文件大?。?/td> 290K
代理商: UCB1100LP
Philips Semiconductors
Preliminary specification
UCB1100
Advanced modem/audio analog front-end
1998 May 08
28
6.10
The nreset signal is captured in the UCB1100 using a asynchronous
pulse stretching circuit. The nreset signal may be pulled down when
the sibclk is still stopped. The internal circuitry remembers this reset
signal and generates an internal reset signal from at least 5 sibclk
periods.
Reset Circuitry
D
R
D
D
’1’
NRESET
sibclk
internal
reset
Q
Q
Q
COUNT
3
&
arstn
SN00159
Figure 34.
Block Diagram of the Reset Circuitry
trsti
tlnrst
0
1
2
3
sibclk
nreset
arstn
count
internal reset
SN00160
Figure 35.
Timing Diagram of the Reset Circuitry
SYMBOL
PARAMETER
CONDITIONS
LIMITS
UNIT
MIN
TYP
MAX
t
lnrst
t
rsti
t
pclrsti
nreset pulse width
5
ns
width of internal reset signal
5 * t
sibclk
ns
delay between rising edge sibclk and internal reset
25
ns
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