ROM
7.5.3
Common error codes
All CI response packets utilize the same set of common return codes in the most-significant nibble of
Mailbox 1. Bit 8 is used as “Command Complete” or “COCO.” It is set to 0 when the command interpreter
first recognizes the incoming command, then is set to 1 when the command is complete (with or without
errors). COCO = 1 means that the command interpreter has done all it can with the command. Mailbox 1
bits 6-4 hold any applicable error code.
Table 7-4. Common CI error codes
Error name
PENDING
RMF_ERROR_NONE
Error =
bits 6:4
0x0 - 0x7
000
Mailbox 1
MS nibble
0x0 - 0x7
0x8
Description
The command is still being executed.
Command completed with no errors
An input parameter did not pass muster. Examples include:
RMF_ERROR_PARAM
001
0x9
incorrect MEM field supplied in CI read/write packet and erase
password does not match RMF_ENABLE_FLASH_ERASE.
Returned when an attempt is made to program or erase flash while
RMF_ERROR_PROT
010
0xA
flash protection is active (FOPT[PROTB] = 0). Call the CI function to
unprotect flash before attempting to program/erase the flash.
RMF_ERROR_
SECURITY
011
0xB
Most CI commands are unavailable when security has been set
(FOPT[SSC] = 10). This error code will be returned when an attempt
has been made to execute a prohibited function.
Returned as a result of a PROGRAM or ERASE command if the
final results of the operation do not match expected values. (ERASE
RMF_ERROR_VERIFY
100
0xC
values are all Fs. PROGRAM values are the input values.)
The address offset of the first found error will be returned in
mailboxes 2 and 3. This error only occurs when the VERF bit is set
in the command byte.
RMF_ERROR_RIGHTS
101
0xD
Indicates that the user does not have access rights to perform a
function, such as attempting to write to ROM.
Generally applicable to cases where an input parameter is not within
RMF_ERROR_RANGE
110
0xE
an expected range of values. For example, a write command that
attempts to program flash memory across physical rows of the
device.
RMF_ERROR_
COMMAND
111
0xF
This code is returned when the command interpreter does not
recognize a command code or an incomplete packet is recognized.
MMA955xL Intelligent, Motion-Sensing Platform Hardware Reference Manual, Rev. 1.0
82
Freescale Semiconductor, Inc.
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