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TNETV2664FIBZWT 数据表(PDF) 71 Page - Texas Instruments |
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TNETV2664FIBZWT 数据表(HTML) 71 Page - Texas Instruments |
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71 / 249 page  TMS320C6424 www.ti.com SPRS347D – MARCH 2007 – REVISED DECEMBER 2009 Table 3-3. C6424 Default Module States (continued) DEFAULT MODULE STATE LPSC # MODULE NAME [PSC Register MDSTATn.STATE] 23 PWM0 SwRstDisable 24 PWM1 SwRstDisable 25 PWM2 SwRstDisable 26 GPIO SwRstDisable 27 TIMER0 SwRstDisable 28 TIMER1 SwRstDisable 39 C64x+ CPU Enable 3.4 Boot Sequence The boot sequence is a process by which the device's memory is loaded with program and data sections, and by which some of the device's internal registers are programmed with predetermined values. The boot sequence is started automatically after each device-level global reset. For more details on device-level global resets, see Section 6.5, Reset. There are several methods by which the memory and register initialization can take place. Each of these methods is referred to as a boot mode. The boot mode to be used is selected at reset. For more information on the bootmode selections, see Section 3.4.1, Boot Modes. The device is booted through multiple means—primary bootloaders within internal ROM or EMIFA, and secondary user bootloaders from peripherals or external memories. Boot modes, pin configurations, and register configurations required for booting the device, are described in the following subsections. 3.4.1 Boot Modes The C6424 boot modes are determined by these device boot and configuration pins. For information on how these pins are sampled at device reset, see Section 6.5.1.2, Latching Boot and Configuration Pins. • BOOTMODE[3:0] • PCIEN • FASTBOOT • PLLMS[2:0] BOOTMODE[3:0] and PCIEN determine the type of boot (e.g., I2C Boot, EMIFA Boot, HPI Boot, or PCI Boot, etc.). FASTBOOT determines if the PLL is enabled during boot to speed up the boot process. PLLMS[2:0] is used by bootloader code to determine the PLL multiplier used during fastboot modes (FASTBOOT = 1). The C6424 boot modes are grouped into two categories—Non-Fastboot Modes and User-Select Multiplier Fastboot Modes. • Non-Fastboot Modes (FASTBOOT = 0): The device operates in default PLL bypass mode during boot. The Non-Fastboot bootmodes available on the C6424 are shown in Table 3-4. • User-Select Multiplier Fastboot Modes (FASTBOOT = 1): The bootloader code speeds up the device during boot. The PLL multiplier is selected by the user via the PLLMS[2:0] pins. The User-Select Multiplier Fastboot bootmodes available on the C6424 are shown in Table 3-5. All other modes not shown in these tables are reserved and invalid settings. Copyright © 2007–2009, Texas Instruments Incorporated Device Configurations 71 Submit Documentation Feedback Product Folder Link(s): TMS320C6424 |
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