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参数资料
型号： AD9549A/PCBZ
厂商： Analog Devices Inc
文件页数： 46/76页
文件大小： 0K
描述： BOARD EVALUATION FOR AD9549A
设计资源： AD9549 Schematics
AD9549 Gerber Files
标准包装： 1
主要目的： 计时，时钟发生器
嵌入式： 否
已用 IC / 零件： AD9549A
主要属性： 8 kHz ~ 750 MHz 输入
次要属性： 差分输出
已供物品： 板
AD9549
Rev. D | Page 50 of 76
Addr
(Hex)
Type1
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
BIt 2
Bit 1
Bit 0
Default
(Hex)
0x01A6
M
FTW0
(open-loop
frequency
tuning
word)
FTW0, Bits[47:0]
LSB: Register 0x01A6
0x00
0x01A7
M
0x00
0x01A8
M
0x00
0x01A9
M
0x00
0x01AA
M
Startup
cond.
0x01AB
M
Startup
cond.
0x01AC
and
0x01AD
M
Phase
(open loop
only)
DDS phase word, Bits[15:0]
0x00
Reference selector/holdover
0x01C0
M
Automatic
control
Holdover
mode
Reserved
Automatic
selector
Automatic
recover
Automatic
holdover
0x00
0x01C1
M
Override
Enable
line card
mode
Enable
ref input
override
REF_AB
Enable
holdover
override
Holdover
on/off
0x00
0x01C2
Averaging
window
FTW windowed average size, Bits[3:0]
0x00
0x01C3
Reference
validation
Reserved
Validation timer, Bits[4:0]
0x00
Doubler and output drivers
0x0200
HSTL
driver
OPOL
(polarity)
Reserved
HSTL output doubler,
Bits[1:0]
0x05
0x0201
CMOS
driver
CMOS mux
0x00
Monitor
0x0300
RO
Status
Reserved
PFD freq.
too high
PFD freq.
too low
Freq. est.
done
Ref
selected
Free run
Ph. lock
detected
Freq. lock
detected
N/A
0x0301
RO
Reserved
REFA
valid
REFA
LOR
REFA OOL
REFB valid
REFB LOR
REFB OOL
N/A
0x0302
RO
IRQ status
PFD freq.
too high
PFD
freq. too
low
Freq. est.
done
Ref
selected
Free run
Phase lock
detected
Freq. lock
detected
0x00
0x0303
RO
REFA
valid
REFA
LOR
REFA OOL
REFB valid
REFB LOR
REFB OOL
0x00
0x0304
IRQ mask
Reserved
Ref
changed
Leave
free run
Enter
free run
0x00
0x0305
Freq. est.
done
Phase
unlock
Phase lock
Freq.
Unlock
Freq. lock
0x00
0x0306
Reserved
REFA
valid
!REFA
valid
REFA
LOR
!REFA LOR
REFA OOL
!REFA OOL
0x00
0x0307
Reserved
REFB
valid
!REFB
valid
REFB
LOR
!REFB LOR
REFB OOL
!REFB OOL
0x00
0x0308
S1 pin
config
REF?
REF? LOR
REF?
OOL
REF? not
valid
Phase
lock
Freq. lock
Reserved
IRQ
0x60
0x0309
S2 pin
config
REF?
REF? LOR
REF?
OOL
REF? not
valid
Phase
lock
Freq. lock
Reserved
IRQ
0xE0
0x030A
S3 pin
config
REF?
REF? LOR
REF?
OOL
REF? not
valid
Phase
lock
Freq. lock
Reserved
IRQ
0x08
0x030B
S4 pin
config
REF?
REF? LOR
REF?
OOL
REF? not
valid
Phase
lock
Freq. lock
Reserved
IRQ
0x01
0x030C
Control
Enable
REFA LOR
Enable
REFA OOL
Enable
REFB
LOR
Enable
REFB OOL
Enable
phase
lock det.
Enable
frequency
lock det.
0xA2
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