参数资料
型号: ADN2855ACPZ-R7
厂商: Analog Devices Inc
文件页数: 2/20页
文件大小: 0K
描述: IC CLK/RECOVERY MULTI 32LFCSP
标准包装: 1,500
类型: 时钟和数据恢复(CDR)
PLL:
主要目的: GPON,BPON,GEPON
输入: CML
输出: LVDS
电路数: 1
比率 - 输入:输出: 1:2
差分 - 输入:输出: 是/是
频率 - 最大: 200MHz
电源电压: 3 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 32-VFQFN 裸露焊盘,CSP
供应商设备封装: 32-LFCSP-VQ(5x5)
包装: 带卷 (TR)
ADN2855
Rev. A | Page 10 of 20
Table 7. Internal Register Map1
Reg. Name
R/W
Address
D7
D6
D5
D4
D3
D2
D1
D0
CTRLA
W
0x08
FREF range
Data rate/DIV_FREF ratio
0
Lock to REFCLK
CTRLA_RD
R
0x05
Readback CTRLA
CTRLB
W
0x09
0
Initiate
acquisition
0
CTRLB_RD
R
0x06
Readback CTRLB
CTRLC
W
0x11
0
Bus swap
Parallel
CLKOUT mode
RxCLK phase
adjust
0
Output boost
CTRLD
W
0x22
Output
mode
Disable
data buffer
Disable clock
buffer
0
Serial CLKOUT
mode
1
All writeable registers default to 0x00.
Table 8. Control Register, CTRLA1
Bit No.
Description
[7:6]
FREF range
00 = 10 MHz to 25 MHz
01 = 25 MHz to 50 MHz
10 = 50 MHz to 100 MHz
11 = 100 MHz to 200 MHz
[5:2]
Data rate/DIV_FREF ratio
0000 = 1
0001 = 2
0010 = 4
n = 2n
1000 = 256
[1]
Set to 0
[0]
Lock to RFCLK
0 = lock to input data
1 = lock to reference clock
1
Where DIV_FREF is the divided down reference referred to the 10 MHz to
20 MHz band (see the Reference Clock section).
Table 9. Control Register, CTRLB
Bit No.
Description
[7:6]
Set to 0
[5]
Initiate acquisition; write a 1 followed by 0
to initiate a new acquisition
[4:0]
Set to 0
Table 10. Control Register, CTRLC
Bit No.
Description
[7:6]
Set to 0
[5]
Bus swap
0 = DAT3 is earliest bit
1 = DAT0 is earliest bit
[4]
Parallel CLKOUT mode
0 = full rate parallel clock
1 = half rate parallel clock (DDR mode)
[3:2]
RxCLK phase adjust
00 = CLK edge in center of eye
01 = +2 UI vs. baseline (CLK edge aligned with
data transition)
10 = +0.5 UI vs. baseline
11 = 1.5 UI vs. baseline
[1]
Set to 0
[0]
Output boost
0 = default
1 = boost output swing
Table 11. Control Register, CTRLD
Bit No.
Description
[7]
Output mode
0 = parallel output
1 = serial output
[6]
Disable data buffer
0 = default
1 = disable data output buffer
[5]
Disable clock buffer
0 = default
1 = disable clock output buffer
[4:1]
Set to 0
[0]
Serial CLKOUT mode
0 = half rate serial clock
1 = full rate serial clock
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