AD6654/PCB Analog Devices Inc, AD6654/PCB Datasheet - Page 55

• Manufacturer Part Number: AD6654/PCB
• Description: BOARD EVALUATION FOR AD6654
• Manufacturer: Analog Devices Inc

Specifications of AD6654/PCB

• Module/board Type: Evaluation Board
• For Use With/related Products: AD6554
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

MASTER/SLAVE PCLK MODES
The parallel ports can operate in either master or slave mode.
The mode is set via PCLK master mode bit in the Parallel Port
Control 2 register. The parallel ports power up in slave mode to
avoid possible contentions on the PCLK pin.
In master mode, PCLK is an output derived by dividing
PLL_CLK down by the PCLK divisor. The PCLK divisor can
have a value of 1, 2, 4, or 8, depending on the 2-bit PCLK
divisor word setting in the Parallel Port Control 2 register. The
highest PLCK rate in master mode is 200 MHz. Master mode is
PxCH [2:0]
Px [15:0]
PxGAIN
PxACK
PxREQ
PCLK
PxIQ
Figure 60. Parallel I/Q Mode with an AGC Gain Word
t
DPREQ
Rev. 0 | Page 55 of 88
t
t
t
DPP
DPIQ
Q [15:8]
DPCH
I [15:8]
selected by setting the PCLK master mode bit in the Parallel
Port Control 2 register.
In slave mode, external circuitry provides the PCLK signal.
Slave mode PCLK signals can be either synchronous or
asynchronous. The maximum slave mode PCLK frequency is
also 200 MHz.
PxCH [2:0] = CHANNEL #
PCLK
rate
GAIN [11:0]
t
DPGAIN
0000 +
=
PLL
PCLK
_
CLK
divisor
rate
AD6654