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SX Power Consumption in Turbo vs Non-Turbo modes

Terry says:

...the non-turbo mode does NOT divide the clock speed. At the slower clock rates it really doesn't save much current at all.

Here is the test program:

FREQ 128_000


  PAUSE 5000
  GOTO Start

Here is what I measured {ed: this was at 5V supply, consumption would have been much less at 3.3 or 2.5 volts. See: SX Power Issues}

32KHz Turbo = 1.32mA
32KHz Non-Turbo = 1.30mA

128KHz Turbo = 1.46mA
128KHz Non-Turbo = 1.40mA

1MHz Turbo = 3.1mA
1MHz Non-Turbo = 2.4mA

4MHz Turbo = 7.7mA
4MHz Non-Turbo = 5.2mA

Considering that 1MHz Turbo (3.1mA) has the same performance as 4MHz Non-Turbo (5.2mA). It is better to use the turbo mode if you are looking at MIP per mA.

Perl62 says:

Non-turbo mode simply adds a few cycles delay to emualte the instruction timing of a PIC. It's purpose was simply to allow PIC firmware to be directly loaded to the SX and still be able to run.

file: /Techref/SCENIX/turbopower.htm, 1KB, , updated: 2005/1/21 12:31, local time: 2024/4/14 19:28,

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