參數(shù)資料
型號(hào): CY28508OXCT
廠商: Silicon Laboratories Inc
文件頁(yè)數(shù): 9/13頁(yè)
文件大?。?/td> 0K
描述: IC CLOCK SSCG 3DIFF PAIR 28SSOP
標(biāo)準(zhǔn)包裝: 1,000
類型: *
PLL:
輸入: 晶體
輸出: 時(shí)鐘
電路數(shù): 1
比率 - 輸入:輸出: 1:4
差分 - 輸入:輸出: 無(wú)/是
頻率 - 最大: 333.3MHz
除法器/乘法器: 是/無(wú)
電源電壓: 2.375 V ~ 3.465 V
工作溫度: 0°C ~ 70°C
安裝類型: *
封裝/外殼: *
供應(yīng)商設(shè)備封裝: *
包裝: *
CY28508
........................ Document #: 38-07534 Rev. *F Page 5 of 13
Byte 3: Dial-a-Frequency Control Register N1 [default = 224.70 MHz, N = 86d, ODSEL = 1]
Bit
@Pup
Description
7
0
Reserved, set = 0.
61
N6, MSB
50
N5
41
N4
30
N3
21
N2
11
N1
00
N0, LSB
Byte 4: Dial-a-Frequency Control Register M1 [default = 224.70 MHz, M = 49d, ODSEL = 1]
Bit
@Pup
Description
7
1
Reserved, set = 1.
6
1
SWODSEL: Output divider select. 0 = /2, 1 = /3.
Changing the output divider causes large instantaneous changes in the CPU pulse width and
should only be changed before system operation is to occur.
5
1
M5 MSB.
41
M4
30
M3
20
M2
10
M1
0
1
M0, LSB.
Byte 5: Dial-a-Frequency Control Register N2 – Only Bit 7 is Used by the CY28508
Bit
@Pup
Description
7
0
UP/DN pulse width limit. During Smooth-Track, the bandwidth hence the slew rate is controlled through
limiting the pulse width of the UP/DN pulse outputs of the phase detector going to the charge pump. The
default is 0 = 20 ns and can be programmed to 1 = 40 ns, which will increase the slew rate.
6
0
Reserved, set = 0.
5
1
Reserved, set = 1.
4
1
Reserved, set = 1.
3
0
Reserved, set = 0.
2
0
Reserved, set = 0.
1
0
Reserved, set = 0.
0
Reserved, set = 0.
Byte 6: Dial-a-Frequency Control Register M2 – Only Bits 6 and 7 are Used by the CY28508
Bit
@Pup
Description
7
1
FSEL Control: 1 = HW FSEL, 0 = SW FSEL
6
1
SW FSEL: 0 = SW MN0 select, 1 = SW MN1 select. Only valid when B6b7 = 0.
5
1
Reserved, set = 1.
4
1
Reserved, set = 1.
3
0
Reserved, set = 0.
2
0
Reserved, set = 0.
1
0
Reserved, set = 0.
0
Reserved, set = 0.
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