參數(shù)資料
型號(hào)： AD9853AS
廠商： ANALOG DEVICES INC
元件分類： 通信及網(wǎng)絡(luò)
英文描述： Programmable Digital OPSK/16-QAM Modulator
中文描述： SPECIALTY TELECOM CIRCUIT, PQFP44
封裝： METRIC, QFP-44
文件頁(yè)數(shù)： 13/31頁(yè)
文件大?。?/td> 335K
代理商： AD9853AS
AD9853
–13–
REV. C
S
DEVICE ADDRESS
A(S)
REGISTER ADDRESS
A(S)
DATA
A(S)
WRITE
DATA
A(S)
P
S
DEVICE ADDRESS
A(S)
REGISTER ADDRESS
A(S)
READ
DATA
A
(M)
P
DEVICE ADDRESS
A(S)
DATA
S
A(M)
LSB = 0
LSB = 1
A(S) = ACKNOWLEDGE BY SLAVE
A(M) = ACKNOWLEDGE BY MASTER
S = START CONDITION
P = STOP CONDITION
A
(M) = NO ACKNOWLEDGE BY MASTER
Figure 27. Serial Control Bus—Read and Write Sequences
R/W
MSB
A
1
0
0
0
0
0
LSB
0 = WRITE / 1 = READ
ADDRESS CONTROL
(SET VIA DEVICE PIN 6)
Figure 28. Serial Control Bus—8-Bit Device Address Detail
t
FH
t
FL
FEC DISABLE/
ENABLE CONTROL
T
X
ENABLE
t
FH
= FEC TO T
X
ENABLE SETUP TIME = 0ns
t
FL
= FEC TO T
X
ENABLE HOLD TIME = 0ns
Figure 29. FEC Enable/Disable Timing Diagram
t
TR
t
RL
T
X
ENABLE
RESET
CONTROL CLOCK
CONTROL DATA
t
RH
t
PWH
t
PWL
t
CH
t
DS
t
DH
t
CS
t
TR
= MINIMUM T
X
ENABLE LOW TO RESET LOW = 10ns
t
RL
= MINIMUM RESET PULSEWIDTH = 10ns
t
RH
= MINIMUM RESET TO START CONDITION = 10ns
t
CH
= MINIMUM CLOCK HOLD TIME START CONDITION = 10ns
t
CS
= MINIMUM CLOCK SETUP TIME STOP CONDITION = 10ns
t
DS
= MINIMUM DATA SETUP TIME = 10ns
t
DH
= MINIMUM DATA HOLD TIME = 10ns
t
PWH
=
t
PWL
= MINIMUM CLOCK PULSEWIDTH HIGH/LOW = 10ns
t
MP
= MINIMUM CLOCK PERIOD = 40ns = 25MHz
t
MP
Figure 30. Serial Control Interface Timing Diagram
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