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參數資料
| 型號： | CY28323 |
| 英文描述： | Clocks and Buffers |
| 中文描述： | 時鐘和緩沖器 |
| 文件頁數： | 9/17頁 |
| 文件大?。?/td> | 240K |
| 代理商： | CY28323 |
CY28312B-2
Document #: 38-07596 Rev. **
Page 9 of 17
Byte 13: Programmable Frequency Select N–Value Register
Bit
Name
Default
0
0
0
0
0
0
0
0
Description
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CPU_FSEL_N7
CPU_FSEL_N6
CPU_FSEL_N5
CPU_FSEL_N4
CPU_FSEL_N3
CPU_FSEL_N2
CPU_FSEL_N1
CPU_FSEL_N0
If Prog_Freq_EN is set, W300 will use the values programmed in
CPU_FSEL_N[7:0] and CPU_FSEL_M[6:0] to determine the CPU output
frequency. The new frequency will start to load whenever CPU_FSELM[6:0] is
updated.
The setting of FS_Override bit determines the frequency ratio for CPU,
SDRAM, AGP and SDRAM. When it is cleared, W312 will use the same
frequency ratio stated in the Latched FS[4:0] register. When it is set,
CY28312B-2 will use the frequency ratio stated in the SEL[4:0] register.
CY28312B-2 supports programmable CPU frequency ranging from 50 MHz to
248 MHz.
Byte 14: Programmable Frequency Select N–Value Register
Bit
Name
Default
0
Description
Bit 7
Pro_Freq_EN
Programmable output frequencies enabled
0 = disabled
1 = enabled
If Prog_Freq_EN is set, W300 will use the values programmed in
CPU_FSEL_N[7:0] and CPU_FSEL_M[6:0] to determine the CPU output
frequency. The new frequency will start to load whenever CPU_FSELM[6:0] is
updated.
The setting of FS_Override bit determines the frequency ratio for CPU,
SDRAM, AGP and SDRAM. When it is cleared, CY28312B-2 will use the same
frequency ratio stated in the Latched FS[4:0] register. When it is set,
CY28312B-2 will use the frequency ratio stated in the SEL[4:0] register.
CY28312B-2 supports programmable CPU frequency ranging from 50 MHz to
248 MHz.
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CPU_FSEL_M6
CPU_FSEL_M5
CPU_FSEL_M4
CPU_FSEL_M3
CPU_FSEL_M2
CPU_FSEL_M1
CPU_FSEL_M0
0
0
0
0
0
0
0
Byte 15: Reserved Register
Bit
Pin#
–
–
–
–
–
–
–
–
Name
Default
0
0
0
0
0
0
1
1
Description
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved. Write with ‘1’
Reserved. Write with ‘1’
Byte 16: Reserved Register
Bit
Pin#
–
–
–
–
–
–
–
Name
Default
0
0
0
0
0
0
0
Description
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
相關PDF資料 |
PDF描述 |
|---|---|
| CY28325-2 | Clocks and Buffers |
| CY28330 | Clocks and Buffers |
| CY28331 | Clocks and Buffers |
| CY28331-2 | Clocks and Buffers |
| CY28341-3 | Clocks and Buffers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| CY28323B | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:FTG for Intel Pentium 4 CPU and Chipsets |
| CY28323BPVC | 制造商:Cypress Semiconductor 功能描述: |
| CY28323BPVCT | 制造商:Cypress Semiconductor 功能描述:Programmable PLL Frequency Generator Dual 48-Pin SSOP T/R |
| CY28323OXC | 功能描述:時鐘發(fā)生器及支持產品 Brookdale RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| CY28323OXCT | 功能描述:時鐘發(fā)生器及支持產品 Brookdale RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
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