參數(shù)資料
型號： PEF24901H
英文描述： ?Quad ISDN Echocancellation Circuit Digital Front-End for 4B3T Line Code?
中文描述： ？四整體數(shù)位服務(wù)網(wǎng)路Echocancellation電路數(shù)字前端4B3T線路碼的終結(jié)？
文件頁數(shù)： 61/73頁
文件大小： 1618K
代理商： PEF24901H
PEB 2466
PEF 2466
Electrical Characteristics and Timing Diagrams
Hardware Reference Manual
52
2001-02-20
8.8
Signaling Interface Timing
8.8.1
Timing from the
μ
C Interface to the SO/SB-pins
Figure 32
Signaling Output Timing (data downstream)
8.8.2
Timing from the SI/SB-pins to the
μ
C Interface
The register update and interrupt behavior resulting from signaling input changes (data
upstream
–
pins SI and SB, if programmed as signaling inputs) depend on internal
sampling clocks, counters and register settings. See
Chapter 5.3.2
for a functional
description.
Parameter
Symbol
Limit Values
typ.
Unit
min.
30
40
40
max.
t
dSout_min
+ t
C_Load
100
t
dSBD_min
+ t
C_Load
SO/SB delay time
1)
SB to
‘
Z
’
- time
SB to
‘
drive
’
-time
1)
All delay times are made up by two components: an intrinsic time (min-time), caused by internal processing,
and a second component t
C_Load
= 0.4ns*C
Load
/pF, caused by external circuitry (C-load).
t
dSout
t
dSBZ
t
dSBD
ns
ns
ns
DCLK
Bit 2
DIN
SO/SB Output
Old Value
New Value
SB
(Output
Input)
Output)
(Input
SB
dSBD
t
High Imp.
t
dSBZ
t
dSout
High Imp.
Bit 1
Bit 0
2466_232
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