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參數(shù)資料
| 型號： | TMS32C6411AGLZ |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | FIXED POINT DIGITAL SIGNAL PROCESSOR |
| 中文描述： | 定點數(shù)字信號處理器 |
| 文件頁數(shù)： | 66/119頁 |
| 文件大?。?/td> | 1742K |
| 代理商： | TMS32C6411AGLZ |
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SPRS196H MARCH 2002 REVISED JULY 2004
66
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
bootmode
The C6411 device resets using the active-low signal RESET. While RESET is low, the device is held in reset
and is initialized to the prescribed reset state. Refer to reset timing for reset timing characteristics and states
of device pins during reset. The release of RESET starts the processor running with the prescribed device
configuration and boot mode.
The C6411 has three types of boot modes:
Host boot
If host boot is selected, upon release of RESET, the CPU is internally “stalled” while the remainder of the
device is released. During this period, an external host can initialize the CPU’s memory space as necessary
through the host interface, including internal configuration registers, such as those that control the EMIF or
other peripherals. For the C6411 device, the HPI peripheral is used for host boot if PCI_EN = 0, and the PCI
peripheral is used if PCI_EN = 1. Once the host is finished with all necessary initialization, it must set the
DSPINT bit in the HPIC register to complete the boot process. This transition causes the boot configuration
logic to bring the CPU out of the “stalled” state. The CPU then begins execution from address 0. The DSPINT
condition is not latched by the CPU, because it occurs while the CPU is still internally “stalled”. Also, DSPINT
brings the CPU out of the “stalled” state only if the host boot process is selected. All memory may be written
to and read by the host. This allows for the host to verify what it sends to the DSP if required. After the CPU is
out of the “stalled” state, the CPU needs to clear the DSPINT, otherwise, no more DSPINTs can be received.
EMIF boot (using default ROM timings)
Upon the release of RESET, the 1K-Byte ROM code located in the beginning of CE1 is copied to address 0
by the EDMA using the default ROM timings, while the CPU is internally “stalled”. The data should be stored
in the endian format that the system is using. In this case, the EMIF automatically assembles consecutive
8-bit bytes to form the 32-bit instruction words to be copied. The transfer is automatically done by the EDMA
as a single-frame block transfer from the ROM to address 0. After completion of the block transfer, the CPU
is released from the “stalled” state and starts running from address 0.
No boot
With no boot, the CPU begins direct execution from the memory located at address 0. Note: operation is
undefined if invalid code is located at address 0.
reset
A hardware reset (RESET) is required to place the DSP into a known good state out of power-up. The RESET
signal can be asserted (pulled low) prior to ramping the core and I/O voltages or after the core and I/O voltages
have reached their proper operating conditions. As a best practice, reset should be held low during power-up.
Prior to deasserting RESET (low-to-high transition), the core and I/O voltages should be at their proper
operating conditions and CLKIN should also be running at the correct frequency.
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