參數(shù)資料
型號: CY28317PVXC-2T
廠商: Silicon Laboratories Inc
文件頁數(shù): 17/20頁
文件大?。?/td> 0K
描述: IC CLK FTG VIA PL/E133T 48SSOP
標準包裝: 1,000
類型: 時鐘/頻率發(fā)生器
PLL:
輸入: 晶體
輸出: HCSL,LVCMOS
電路數(shù): 1
比率 - 輸入:輸出: 1:20
差分 - 輸入:輸出: 無/是
頻率 - 最大: 248MHz
電源電壓: 3.135 V ~ 3.465 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 48-BSSOP(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 48-SSOP
包裝: 帶卷 (TR)
CY28317-2
....................... Document #: 38-07094 Rev. *B Page 6 of 20
CY28317-2 Serial Configuration Map
1. The serial bits will be read by the clock driver in the following
order:
Byte 0 – Bits 7, 6, 5, 4, 3, 2, 1, 0
Byte 1 – Bits 7, 6, 5, 4, 3, 2, 1, 0
Byte N – Bits 7, 6, 5, 4, 3, 2, 1, 0
2. All unused register bits (reserved and N/A) should be
written to a “0” level.
3. All register bits labeled “Write with 1" must be written to one
during initialization.
Byte 0: Control Register 0
Bit
Pin#
Name
Default
Description
Bit 7
Spread Select1
0
See definition in Bit[0]
Bit 6
SEL2
0
Bit 5
SEL1
0
Bit 4
SEL0
0
Bit 3
FS_Override
0
0 = Select operating frequency by FS[4:0] input pins
1 = Select operating frequency by SEL[4:0] settings
Bit 2
SEL4
0
Bit 1
SEL3
0
Bit 0
Spread Select0
0
‘00’ = OFF
‘01’ = –0.5%
‘10’ = ±0.5%
‘11’ = ±0.25%
Byte 1: Control Register 1
Bit
Pin#
Name
Default
Description
Bit 7
10
Latched FS4 input
X
Latched FS[4:0] inputs. These bits are read-only.
Bit 6
11
Latched FS3 input
X
Bit 5
2
Latched FS2 input
X
Bit 4
26
Latched FS1 input
X
Bit 3
27
Latched FS0 input
X
Bit 2
48
CPU0
1
(Active/Inactive)
Bit 1
47
CPU1
1
(Active/Inactive)
Bit 0
44, 43
CPUT, CPUC
1
(Active/Inactive)
Byte 2: Control Register 2
Bit
Pin#
Name
Default
Description
Bit 7
39
SDRAM6
1
(Active/Inactive)
Bit 6
10
PCI0_F
1
(Active/Inactive)
Bit 5
17
PCI6
1
(Active/Inactive)
Bit 4
16
PCI5
1
(Active/Inactive)
Bit 3
15
PCI4
1
(Active/Inactive)
Bit 2
14
PCI3
1
(Active/Inactive)
Bit 1
13
PCI2
1
(Active/Inactive)
Bit 0
11
PCI1
1
(Active/Inactive)
Byte 3: Control Register 3
Bit
Pin#
Name
Default
Description
Bit 7
Reserved
1
Reserved
Bit 6
SEL_48MHz
0
0 = 24 MHz
1 = 48 MHz
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