TMS320C6713和TMS320C6713B有什么区别？

网上查得二者的区别在一个叫“spra851h”的文档中有注明，于是google  “spra851h” 得到如下链接：http://www.ti.com/lit/an/spra851h/spra851h.pdf

 

打开网页，会打开一个PDF文档，看第八页会有相关说明：

2.1 C6713B Versus C6713 New Features [D]
In addition to the new/enhanced peripherals listed in section 1.12, the C6713B DSP features
new enhancements over the C6713 device. These features are compatible with existing C6713
designs.
• P-bit in Cache Configuration (CCFG) register
The C6713B device includes an enhancement to the cache configuration (CCFG) register. A
”P” bit (CCFG.31) allows the programmer to select the priority of accesses to L2 memory
originating from the transfer crossbar (TC) over accesses originating from the L1D memory
system. While the EDMA normally has no issue accessing L2 memory due to the high hit
rates on the L1D memory system, there are pathological cases where certain CPU behavior
could block the EDMA from accessing the L2 memory for long enough to cause a missed
deadline when transferring data to a peripheral such as the McASP or McBSP. This can be
avoided by setting the P bit to ”1” because the EDMA will assume a higher priority than the
L1D memory system when accessing L2 memory. For more details on this feature, see the
TMS320C6713, TMS320C6713B Floating-Point Digital Signal Processor data sheet
(SPRS186) and the TMS320C6713, TMS320C6713B Digital Signal Processor Silicon Errata
(Silicon Revision 2.0, 1.1) (SPRZ191).
• EMIF Big Endian correctness
The C6713B device allows the flexibility to change the EMIF data placement on the EMIF
bus. When using the default setting of pin HD12 (pulled high) for the C6713B, the EMIF will
present 8-bit or 16-bit data on the ED[7:0] side of the bus if using Little Endian mode and to
the ED[31:24] side of the bus if using Big Endian mode. When pin HD12 is pulled low for the
C6713B, the EMIF will present 8-bit or 16-bit data on the ED[7:0] side of the bus, regardless
of the endianess. For more details on this enhancement, see the TMS320C6713,
TMS320C6713B Floating-Point Digital Signal Processor data sheet (SPRS186).

 

如上所述，其实也就两处改动吧，6713B是6713的一个新版本吧，在TI的文档中，有专门的TMS320C6713B和TMS320C6713，也有二者混为一起的，在TMS320C6713B中的内核电压中提到了1.4V，这个不要大惊小怪，看一下1.4V后面是有备注的“GDP and ZDP packages C6711D-300 only”，其实6713B的文档是多个型号芯片的合一版，因些不要误解。

 

以下说一点我一直感觉很奇怪，有我见到的一块DSP实验板上，DSP供电采用的TPS70351，而这款芯片是3.3V和1.8V供电输出的，但DSP却一直正常工作，没有烧毁，查一下6713B的手册吧，CVDD最大才1.32V，太神奇了，超了这么多居然还烧不了，太神奇了。

有一种这样的评论：TI公司的芯片都性能都挺好的，比如430系列的单片机，那真是超低功耗；TMS系列的DSP就更不用说了，称霸世界；但就是芯片特别脆弱，很容易坏。

这么看来，TI的芯片也很耐折腾啊……