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TNETV2665ZWT6 数据表(PDF) 77 Page - Texas Instruments

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部件名 TNETV2665ZWT6
功能描述  Fixed-Point Digital Signal Processor
Download  249 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

TNETV2665ZWT6 数据表(HTML) 77 Page - Texas Instruments

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TMS320C6424
www.ti.com
SPRS347D – MARCH 2007 – REVISED DECEMBER 2009
For example, if BOOTMODE[3:0] = 0110b, FASTBOOT = 1, the MXI/CLKIN frequency = 30 MHz,
PLLMS[2:0] = 100b, the combination of Table 3-5 and Table 3-6 indicates that the device frequency
(SYSCLK1) is CLKIN x 22 / 2 = 330 MHz. This means SYSCLK3 frequency is 330 / 6 = 55 MHz, resulting
in SPI serial clock frequency of 55 / 3 = 18.3 MHz.
3.4.1.5
Host Boot Modes
The C6424 supports two types of host boots—PCI Boot or HPI Boot.
The PCI Boot (BOOTMODE[3:0] = 0001b or 0010b, PCIEN = 1) is only available in fastboot
(FASTBOOT = 1), as shown in Table 3-5.
The HPI Boot is available in fastboot and non-fastboot, as shown in Table 3-4 and Table 3-5.
Note: The HPI HSTROBE inactive pulse duration timing requirement [tw(HSTBH)] is dependent on the HPI
internal clock source (SYSCLK3) frequency (see Section 6.12.3, HPI Electrical Data/Timing). The external
host must be aware of the SYSCLK3 frequency during boot to ensure the HSTROBE pulse duration
timing requirement is met.
3.4.2
Bootmode Registers
3.4.2.1
BOOTCFG Register
The Device Bootmode (see Section 3.4.1, Boot Modes) and Configuration pins (see Section 3.5.1, Device
and Peripheral Configurations at Device Reset) latched at reset are captured in the Device Boot
Configuration (BOOTCFG) register which is accessible through the System Module. This is a read-only
register. The bits show the values latched from the corresponding configuration pins sampled at device
reset. For more information on how these pins are sampled at device reset, see Section 6.5.1.2, Latching
Boot and Configuration Pins. For the corresponding device boot and configuration pins, see Table 2-7,
BOOT Terminal Functions.
31
21
20
19
18
17
16
LENDI
FASTB
DPCIE
RESERVED
RSV
8_16
AN
OOT
N
R-0000 0000 0001
R-L
R-L
R-0
R-L
R-L
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RSV
PLLMS
RSV
DAEM
RESERVED
BOOTMODE
R-0
R-LLL
R-0
R-LLL
R-0000
R-LLLL
LEGEND: R = Read only; L = pin state latched at reset rising edge; -n = value after reset
Figure 3-2. BOOTCFG Register—0x01C4 0014
Table 3-7. BOOTCFG Register Description
Bit
Field Name
Description
31:21
RESERVED
Reserved. Writes have no effect.
Little Endian Selection (see Section 3.5.1.4, Endianess Selection (LENDIAN))
This field determines the device endian mode.
20
LENDIAN
0 = Device is Big Endian
1 = Device is Little Endian
The default value is latched from LENDIAN configuration pin.
Copyright © 2007–2009, Texas Instruments Incorporated
Device Configurations
77
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