參數資料
型號: MT312
廠商: ZARLINK SEMICONDUCTOR INC
元件分類: 消費家電
英文描述: Satellite Channel Decoder
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP80
封裝: MQFP-80
文件頁數: 77/90頁
文件大小: 318K
代理商: MT312
Microprocessor Control
MT312
77
11.6 Primary 2-Wire Bus Timing
Where:
S = Start
Sr = Restart, i.e. Start without stopping
fi
rst.
P = Stop.
Note 1.The rise time depends on the external bus pull up resistor.
Parameter: Primary 2-wire bus only
Symbol
Value
Unit
Min
Max
CLK1 clock frequency
f
CLK
0
450
kHz
Bus free time between a STOP and START condition.
t
BUFF
200
ns
Hold time (repeated) START condition.
t
HD;STA
200
ns
LOW period of CLK1 clock.
t
LOW
450
ns
HIGH period of CLK1 clock.
t
HIGH
600
ns
Set-up time for a repeated START condition.
t
SU;STA
200
ns
Data hold time (when input).
t
HD;DAT
100
ns
Data set-up time
t
SU;DAT
100
ns
Rise time of both CLK1 and DATA1 signals.
t
R
note 1
ns
Rise time of both CLK1 and DATA1 signals, (100pF to ground)
t
F
20
ns
Set-up time for a STOP condition.
t
SU;STO
200
ns
Table 8 - Primary 2-wire bus timing
P
S
P
DATA1
CLK1
t
HD;STA
t
HD;DAT
t
HIGH
t
SU;DAT
t
SU;STA
t
SU;STO
t
LOW
t
R
t
F
t
BUFF
Sr
Figure 26 - One DiSEqC
data byte - 0x11 (hex) plus parity bit
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