AD9553/PCBZ Analog Devices Inc, AD9553/PCBZ Datasheet - Page 33

• Manufacturer Part Number: AD9553/PCBZ
• Description: Clock Translator Eval. Board
• Manufacturer: Analog Devices Inc

Specifications of AD9553/PCBZ

• Silicon Manufacturer: Analog Devices
• Silicon Core Number: AD9553
• Kit Application Type: Clock & Timing
• Application Sub Type: Clock Translator
• Peak Reflow Compatible (260 C): Yes
• Msl: MSL 3 - 168 Hours
• Rohs Compliant: Yes
• Development Tool Type: Hardware - Eval/Demo Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

REGISTER MAP
A bit that is labeled ACLR is an active high, autoclearing bit. When set to a Logic 1 state, the control logic automatically returns it to a
Logic 0 state upon completion of the indicated task.
Table 27. Register Map
Addr.
(Hex)
0x00
0x04
0x05
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
0x1C
0x1D
0x1E
Register
Name
Serial port
control
Readback
control
I/O update
PLL charge
pump and
PFD control
VCO control
PLL and
output
frequency
control
Input
receiver and
band gap
control
XTAL
control
Unused
(MSB)
Bit 7
0
Unused
Unused
Enable SPI
control of
charge
pump
current
Unused
Antibacklash Control[1:0]
Calibrate
VCO (ACLR)
Unused
Unused
Reference
reset (ACLR)
Disable SPI
control of
XTAL tuning
capacitance
Unused
Unused
Unused
P
1
Divider[1:0]
P
Feedback Divider (N)[3:0]
0
Divider[2:0]
Bit 6
LSB first
Unused
Unused
Enable SPI
control of
antiback-
lash
period
Unused
Enable
ALC
Unused
Unused
0
Unused
Unused
Unused
P
2
Divider[3:0]
(00000 = maximum, 11111 = minimum)
Bit 5
Soft reset
(ACLR)
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
VCO Level Control[5:0]
Charge Pump
Band Gap Voltage Adjust[4:0]
Mode[1:0]
VCO Band Control[6:0]
(3.5 μA granularity, ~900 μA full scale)
ALC Threshold[2:0]
Charge Pump Current Control[7:0]
Rev. A | Page 33 of 44
Bit 4
1
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Feedback Divider (N)[19:12]
Feedback Divider (N)[11:4]
P
1
(0.25 pF per bit, inverted binary coding)
Divider[9:2]
XTAL Tuning Capacitor Control[5:0]
Bit 3
1
Unused
Unused
Disable
charge
pump
Unused
Unused
Enable SPI
control of
feedback
divider
Enable test
port
Unused
Unused
Unused
Unused
Unused
Unused
P
2
Divider[9:4]
Unused
Unused
Unused
Bit 2
Soft reset
Unused
Unused
PFD
feedback
input edge
control
Unused
Enable SPI
control of
VCO
calibration
Unused
Enable SPI
control of
output
dividers
Unused
Unused
Test Mux[1:0]
Charge Pump Clock DIV[2:0]
Bit 1
LSB first
Unused
Unused
PFD
reference
input edge
control
Unused
Boost VCO
supply
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
(LSB)
Bit 0
0
Readback
control
I/O update
(ACLR)
Force VCO
to midpoint
frequency
PLL lock
detector
power-
down
Enable SPI
control of
VCO band
setting
Unused
Unused
Unused
Reset PLL
(ACLR)
Unused
Unused
Unused
Enable SPI
control of
band gap
voltage
Unused
Unused
Unused
AD9553
Default
0x18
0x00
0x00
0x80
0x30
0x00
0x00
0x70
0x80
0x80
0x00
0x80
0x00
0x00
0x20
0x00
0x01
0x00
0x20
0x00
0x80
0x00
0x00