4 VCNTL pins represents 6 bits

Wenjun Huang

Expert 1770 points

Hardware Design Guide for Keystone Devices p 75 out of 120:

In Table 11, there are 4 VCNTL pins (VCNTL3:0) however they seem to represent 6 bits? Why is that so?

over 14 years ago

0 Chad Courtney over 14 years ago

TI__Mastermind 30825 points

It's 4pins, but it's 6bit data - 3pins for data one for select. So it's sent in two data sets (LSBs and MSBs.)

Best Regards,
Chad

0 Wenjun Huang over 14 years ago in reply to Chad Courtney

Expert 1770 points

Where is the document (document and page) that says this? I could not find it in the c6672 datasheet and keystone hardware design guide document.

0 Bill Taboada over 14 years ago in reply to Wenjun Huang

TI__Mastermind 42545 points

The interface is described in section 7.3.4 Smartreflex in the C6672 data manual. Figure 7-9 illustrates the use of VCNTL[2:0] as a three bit data interface and VCNTL3 as a command bit to represent the six bits needed for smartreflex.

0 Wenjun Huang over 14 years ago in reply to Bill Taboada

Expert 1770 points

Oh yes, I found it. Thanks.

Processors

Processors forum

4 VCNTL pins represents 6 bits