参数资料
型号: XRT8001ID-F
厂商: Exar Corporation
文件页数: 32/48页
文件大小: 0K
描述: IC WAN T1/E1 DUAL 18SOIC
标准包装: 20
类型: 时钟/频率发生器
PLL:
主要目的: 以太网(WAN),T1/E1
输入: 时钟
输出: 时钟
电路数: 1
比率 - 输入:输出: 1:2
差分 - 输入:输出: 无/无
频率 - 最大: 16.384kHz
电源电压: 3.3 V ~ 5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 18-SOIC(0.295",7.50mm 宽)
供应商设备封装: 18-SOIC
包装: 管件
其它名称: 1016-1358-5
XRT8001
38
Rev. 1.01
Optional
+ 5V
18
17
16
15
1
2
3
4
SDO
SYNC
FIN
Vcc
SDI
CSB
SCLK
GND
1.544 MHz
2.048 MHz
N.C.
5
6
7
8
9
GND
CKL1
V
CC
MSB
GND
LOCKDET
V
CC
CLK
2
GND
14
13
12
11
10
VCC
+ 5V
PLD
or
P
+ 5V
Serial Port Control
N.C.
Reset
Busy
VER_REQ
VER_PASS/FAIL
+5V
Clock and Data In
8/64 kHz out
Optional
+ 5V
18
17
16
15
1
2
3
4
SDO
SYNC
FIN
Vcc
SDI
CSB
SCLK
GND
1.544 MHz
2.048 MHz
N.C.
5
6
7
8
9
GND
CKL1
V
CC
MSB
GND
LOCKDET
V
CC
CLK
2
GND
14
13
12
11
10
VCC
+ 5V
PLD
or
P
+ 5V
Serial Port Control
N.C.
Reset
Busy
VER_REQ
VER_PASS/FAIL
+5V
Clock and Data In
8/64 kHz out
XRT8001
Figure 22. Typical Application Example: Generating 2.048MHz from 1.544MHz
Serial Port Programming in Four Steps
Step
Procedure
Result
1
Set the "MSB_OUT" output pin to "high"
Configures XRT8001 to operate in "Master" mode
2
Write the value "00101" into Command
Configures XRT8001 to accept an "N x 1.544MHz clock
Register CR0 (located at 0x00)
signal via the "FIN" input pin., and output a "K x 64kHz"
clock signal via the "CLK1" output pin. (For this
application N = 1 and K = 32). This step also enables
"PLL #1" within the XRT8001
3
Write the value "00000" into Command
Sets "N" (as in "N x 1.544MHz") to be "1"
Register CR1 (located at 0x01)
4
Write the value "11111" into Command
Sets "K" (as in "K x 64kHz") to be "32"
Register CR2 (located at 0x02)
5
Write the value "01000" into Command
Enables the output driver for CLK1
Register CR4 (located at 0x04)
8.0 Generating 2.048MHz from 1.55MHz
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