PowerQuad on LPC55S66
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Hi,
According to UM11126:
In the LPC55S6x, the PowerQuad uses SRAM Bank 4 (16kB at 0x2004 0000 to 3FFF
or 0x3004 0000 to 3FFF depending on the Secured or Non Secured Configuration) for
scratch pad.
However there is no SRAM4 on 144KB devices:
RAM Total | RAM-X (KB) | RAM0 (KB) | RAM1 (KB) | RAM2 (KB) | RAM3 (KB) | RAM4 (KB) | USB-RAM (KB) |
144 KB devices | 32 | 64 | 32 | - | - | - | 16 |
So does PowerQuad works on this part ?
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Hi,
Thanks for your reply.
Could you give me more detail:
- What's the performance difference if RAM4 is not used ?
- How to use other RAM area ? I haven't found any information in reference manual and in kSDK.
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Hi,
I see that the LPC55S66 has just 144K SRAM and does not have RAM4 memory.
I will ask the AE team if the PowerQuad can work without RAM4 module. Pls be patient.
BR
XiangJun Rong
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Hi,
This is the AE team reply:
"PQ can work with LPC55S66. The use of RAM4 is optional, if using RAM4, QR can reach best performance, with PQ can also use other RAM area.
"
It means that the PowerQuad of LPC55S66 can work without RAM4 module.
Hope it can help you
BR
XiangJun Rong