AD9853 Analog Devices, AD9853 Datasheet - Page 13

• Manufacturer Part Number: AD9853
• Description: Programmable Digital OPSK/16-QAM Modulator
• Manufacturer: Analog Devices

REV. C
ENABLE CONTROL
FEC DISABLE/
WRITE
READ
T
X
ENABLE
S
S
CONTROL CLOCK
DEVICE ADDRESS
DEVICE ADDRESS
CONTROL DATA
S = START CONDITION
P = STOP CONDITION
MSB
T
LSB = 0
X
ENABLE
RESET
t
t
0
FH
FL
= FEC TO T
= FEC TO T
Figure 28. Serial Control Bus—8-Bit Device Address Detail
t
Figure 27. Serial Control Bus—Read and Write Sequences
FH
0
A(S)
A(S)
t
Figure 30. Serial Control Interface Timing Diagram
TR
Figure 29. FEC Enable/Disable Timing Diagram
0
X
X
t
t
t
t
t
t
t
t
t
TR
RL
RH
CH
CS
DS
DH
PWH
MP
ENABLE HOLD TIME = 0ns
ENABLE SETUP TIME = 0ns
REGISTER ADDRESS
REGISTER ADDRESS
= MINIMUM T
= MINIMUM RESET PULSEWIDTH = 10ns
= MINIMUM RESET TO START CONDITION = 10ns
= MINIMUM CLOCK HOLD TIME START CONDITION = 10ns
= MINIMUM CLOCK SETUP TIME STOP CONDITION = 10ns
= MINIMUM DATA SETUP TIME = 10ns
= MINIMUM DATA HOLD TIME = 10ns
= MINIMUM CLOCK PERIOD = 40ns = 25MHz
=
A(S) = ACKNOWLEDGE BY SLAVE
A(M) = ACKNOWLEDGE BY MASTER
0
t
t
t
PWL
RL
RH
= MINIMUM CLOCK PULSEWIDTH HIGH/LOW = 10ns
0
X
ENABLE LOW TO RESET LOW = 10ns
1
t
CH
t
PWH
A(S)
A(S)
A
t
t
MP
DS
–13–
t
R/W
PWL
S
DATA
DEVICE ADDRESS
LSB
0 = WRITE / 1 = READ
ADDRESS CONTROL
(SET VIA DEVICE PIN 6)
LSB = 1
A(S)
t
DH
A(M) = NO ACKNOWLEDGE BY MASTER
DATA A(S)
A(S)
DATA
P
A(M)
t
CS
t
FL
DATA A(M)
AD9853
P