參數(shù)資料
型號： TMS320DM642ZDK600
廠商： Texas Instruments, Inc.
英文描述： Adjustable 2.5-36V +/-2.2% Tolerance, 1-100mA Shunt Regulator; Package: TO-92 (TO-226) 5.33mm Body Height; No of Pins: 3; Container: Fan-Fold; Qty per Container: 2000
中文描述： 視頻/影像定點數(shù)字信號處理器
文件頁數(shù)： 41/123頁
文件大?。?/td> 1205K
代理商： TMS320DM642ZDK600
www.ti.com
3.6.1
OSC and PLL Block
X1
XCLKIN
(3.3-V clock input)
On chip
oscillator
X2
xor
PLLSTS[OSCOFF]
OSCCLK
PLL
VCOCLK
4-bit PLL Select (PLLCR)
OSCCLK or
VCOCLK
CLKIN
OSCCLK
0
PLLSTS[PLLOFF]
n
n
≠
0
/2
PLLSTS[CLKINDIV]
TMS320F2808, TMS320F2806
TMS320F2801, UCD9501
Digital Signal Processors
SPRS230F–OCTOBER 2003–REVISED SEPTEMBER 2005
The PLL, clocking, watchdog and low-power modes, are controlled by the registers listed in
Table 3-13
.
Table 3-13. PLL, Clocking, Watchdog, and Low-Power Mode Registers
(1)
NAME
ADDRESS
0x7010
0x7011
0x7012
0x7019
0x701A
0x701B
0x701C
0x701D
0x701E
0x701F
0x7020
0x7021
0x7022
0x7023
0x7024
0x7025
0x7026
0x7028
0x7029
0x702A
0x702F
SIZE (x16)
1
1
DESCRIPTION
XCLK
PLLSTS
XCLKOUT Pin Control, X1 and XCLKIN Status Register
PLL Status Register
reserved
8
HISPCP
LOSPCP
PCLKCR0
PCLKCR1
LPMCR0
1
1
1
1
1
High-Speed Peripheral Clock Prescaler Register (for HSPCLK)
Low-Speed Peripheral Clock Prescaler Register (for LSPCLK)
Peripheral Clock Control Register 0
Peripheral Clock Control Register 1
Low Power Mode Control Register 0
reserved
1
PLLCR
SCSR
WDCNTR
reserved
WDKEY
1
1
1
1
1
PLL Control Register
System Control and Status Register
Watchdog Counter Register
Watchdog Reset Key Register
reserved
3
WDCR
1
Watchdog Control Register
reserved
6
(1)
All of the registers in this table are EALLOW protected.
Figure 3-8
shows the OSC and PLL block on the 280x.
Figure 3-8. OSC and PLL Block Diagram
The on-chip oscillator circuit enables a crystal/resonator to be attached to the 280x devices using the X1
and X2 pins. If the on-chip oscillator is not used, an external oscillator can be used in either one of the
following configurations:
1. A 3.3-V external oscillator can be directly connected to the XCLKIN pin. The X2 pin should be left
unconnected and the X1 pin tied low. The logic-high level in this case should not exceed V
DDIO
.
Functional Overview
41
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