topic P1010 DDR Controller Errata A-004508, Setting bit in mystery register to get Full Industrial Temperature Range in P-Series

P1010 DDR Controller Errata A-004508, Setting bit in mystery register to get Full Industrial Temperature Range

melbournebob — Tue, 11 Aug 2015 13:57:57 GMT

The P1010 Errata A-004508 states that bit 22 of a register at location 0x0_2f08 offset from the CCSR should be set if the controller is initialized below 0 degrees C and then operated at temperatures above 65 degrees C.

The P1010 Reference Manual has no definition of the register at 0x02f08 off the CCSR. The largest offset for a DDR related register is at 0x02E58 (DDR_ERR_SBE).

When reading the mystery register I usually see 0x00000010, but occasionally I read 0x00000011.

Does anyone have a definition of the bits in this register (CCSR + 0x02f08)? If I perform a read/modify/write to set bit 22 in this register will it cause any issues (even if the LSB is set)?

Note: P1010 Chip Errata, Rev. L, 04/2013

Re: P1010 DDR Controller Errata A-004508, Setting bit in mystery register to get Full Industrial Temperature Range

alexander_yakov — Tue, 11 Aug 2015 14:53:18 GMT

The document you referring "P1010 Chip Errata, Rev. L, 04/2013" is not availably publicly, therefore it is not correct to discuss this document contents in public community.

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Re: P1010 DDR Controller Errata A-004508, Setting bit in mystery register to get Full Industrial Temperature Range

scottwood — Wed, 12 Aug 2015 04:20:19 GMT

Errata workarounds often reference undocumented registers. If a workaround tells you to set or clear certain bits, use a read-modify-write.