參數(shù)資料
型號: TMS320C82GGP-60
元件分類: 數(shù)字信號處理
英文描述: 32-Bit Digital Signal Processor
中文描述: 32位數(shù)字信號處理器
文件頁數(shù): 60/132頁
文件大小: 1707K
代理商: TMS320C82GGP-60
SPRS145G
JULY 2000
REVISED FEBRUARY 2002
60
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251
1443
PLL-based clock module
The 240xA has an on-chip, PLL-based clock module. This module provides all the necessary clocking signals
for the device, as well as control for low-power mode entry. The PLL has a 3-bit ratio control to select different
CPU clock rates. See Figure 15 for the PLL Clock Module Block Diagram, Table 9 for clock rates, and Table 10
for the loop filter component values.
The PLL-based clock module provides two modes of operation:
Crystal-operation
This mode allows the use of an external crystal/resonator to provide the time base to the device.
External clock source operation
This mode allows the internal oscillator to be bypassed. The device clocks are generated from an external
clock source input on the XTAL1/CLKIN pin. In this case, an external oscillator clock is connected to the
XTAL1/CLKIN pin.
XTAL2
XTAL1/CLKIN
PLL
XTAL
OSC
CLKOUT
Fin
3-bit
PLL Select
(SCSR1.[11:9])
R1
C1
C2
PLLF
RESONATOR/
CRYSTAL
PLLF2
Cb1
Cb2
Figure 15. PLL Clock Module Block Diagram
Table 9. PLL Clock Selection Through Bits (11
9) in SCSR1 Register
CLK PS2
CLK PS1
CLK PS0
CLKOUT
4
×
Fin
2
×
Fin
1.33
×
Fin
1
×
Fin
0.8
×
Fin
0.66
×
Fin
0.57
×
Fin
0.5
×
Fin
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Default multiplication factor after reset is (1,1,1), i.e., 0.5
×
Fin.
CAUTION:
The bootloader sets the PLL to x2 or x4 option. If the bootloader is used, the value of CLKIN
used should not force CLKOUT to exceed the maximum rated device speed. See the
Boot
ROM
section for more details.
相關PDF資料
PDF描述
TMS320DM642-500 Video/Imaging Fixed-Point Digital Signal Processor
TMS320DM642-600 Video/Imaging Fixed-Point Digital Signal Processor
TMS320F241FNS 16-Bit Digital Signal Processor
TMS320F241PGA 16-Bit Digital Signal Processor
TMS320F241PGS 16-Bit Digital Signal Processor
相關代理商/技術參數(shù)
參數(shù)描述
TMS320D788E001BRFPG4 制造商:Texas Instruments 功能描述:TMS320D788E001 266MHZ 144PIN LQFP
TMS320DA050GGU100 制造商:Texas Instruments 功能描述:DIGITAL AUDIO VERSION OF VC5409GGU100 - Trays
TMS320DA140PGE16D 制造商:Texas Instruments 功能描述:DA140 - Trays
TMS320DA150PGE160 制造商:Texas Instruments 功能描述:DSP Fix PT 16-Bit 160MHz 160MIPS 144-Pin LQFP 制造商:Texas Instruments 功能描述:- Trays
TMS320DA150PGE16AD 制造商:Texas Instruments 功能描述:FIXED-POINT DSP - Trays