参数资料
型号: AD9949AKCPZRL
厂商: Analog Devices Inc
文件页数: 17/36页
文件大小: 0K
描述: IC CCD SIGNAL PROCESSOR 40-LFCSP
标准包装: 2,500
类型: CCD 信号处理器,12 位
输入类型: 逻辑
输出类型: 逻辑
接口: 3 线串口
安装类型: 表面贴装
封装/外壳: 40-VFQFN 裸露焊盘,CSP
供应商设备封装: 40-LFCSP
包装: 带卷 (TR)
AD9949
Rev. B | Page 24 of 36
H-COUNTER SYNCHRONIZATION
The H-Counter reset occurs seven CLI cycles following the HD falling edge. The PxGA steering is synchronized with the reset of the
internal H-Counter (see Figure 26).
As mentioned in the H-Counter Behavior section, the AD9949 H-counter rolls over to zero and continues counting when the maximum
counter length is exceeded. The newer AD9949A product does not roll over but holds at its maximum value until the next HD rising edge
occurs.
000
1
2
111
0
3
11
00
0123456789
10
11
12
14
15
0123
02
H-COUNTER
RESET
VD
NOTES
1. INTERNAL H-COUNTER IS RESET 7 CLI CYCLES AFTER THE HD FALLING EDGE (WHEN USING VDHDEDGE = 0).
2. TYPICAL TIMING RELATIONSHIP: CLI RISING EDGE IS COINCIDENT WITH HD FALLING EDGE.
3. PxGA STEERING IS SYNCRONIZED WITH THE RESET OF THE INTERNAL H-COUNTER (MOSAIC SEPARATE MODE IS SHOWN).
HD
XX
X
PxGA GAIN
REGISTER
CLI
3
XX
X
H-COUNTER
(PIXEL COUNTER)
X
03751-027
Figure 26. H-Counter Synchronization
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