Part Number: TMS320F28075
SPI LOW Speed vs HIGH Speed….. Is there a “Rule of Thumb” on when one needs to Use High Speed Mode?
Here are details of application:
TMS320F28075PTPT (176 pin)
120Mhz SYSCLK (20Mhz XTAL * 6)
LSPCLK = SYSCLK / 4 = 30Mhz
SPI FREQ = 30Mhz/(1+SPIBRR)
EXAMPLE: 5Mhz (SPIBRR= 5)
I would expect LOW Speed Mode to be more tolerance/ROBUST to timing etc
|
SPI FREQ (Mhz) |
SPIBRR |
MODE |
Comments |
|
1 |
29 |
LOW |
|
|
5 |
5 |
? |
|
|
6 |
4 |
? |
|
|
7.5 |
3 |
? |
|
|
10 |
2 |
? |
|
|
15 |
1 |
? |
|
|
30 |
0 |
HIGH |
|
I plan on using the IO below for our SPI….. to allow us flexibility for having Low + High speed Mode
