NXP Semiconductors MWCT101 S Series, Reference Manual

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Table 32-58. Set FlexRAM Function command FCCOB requirements
FCCOB Number FCCOB Contents [7:0]
0 0x81 (SETRAM)
1
FlexRAM Function Control Code
(see Table 32-59 )
2 Reserved
3 Reserved
4 Number of FlexRAM bytes allocated for EEPROM quick writes [15:8]
5 Number of FlexRAM bytes allocated for EEPROM quick writes [7:0]
Returned Values
5
Brown-out (BO) Detection Codes
• 0x00 - No EEPROM issues detected
• 0x01 - BO detected before completing EEPROM quick write maintenance
• 0x02 - BO detected before completing EEPROM quick writes
• 0x04 - BO detected during normal EEPROM write activity
6 Number of EEPROM quick write records requiring maintenance [15:8]
7 Number of EEPROM quick write records requiring maintenance [7:0]
8 EEPROM sector erase count [15:8]
9 EEPROM sector erase count [7:0]
Table 32-59. FlexRAM Function control
FlexRAM Function
Control Code
Action
0xFF
Make FlexRAM available as RAM:
• Clear the FCNFG[RAMRDY] and FCNFG[EEERDY] flags
• Write a background of ones to all FlexRAM locations
• Set the FCNFG[RAMRDY] flag
0xAA
Complete interrupted EEPROM quick write process
• Clear the FCNFG.EEERDY flag (and FCNFG.RAMRDY flag)
• Complete maintenance on interrupted EEPROM quick write operations
• Set the FCNFG.EEERDY flag
0x77
EEPROM quick write status query
• Clear the FCNFG.EEERDY flag (and FCNFG.RAMRDY flag)
• Report emulated EEPROM status
• Set the FCNFG.EERDY flag
0x55
Make FlexRAM available for EEPROM quick writes
• Clear the FCNFG.EERDY flash (and FCNFG.RAMRDY flag)
• Enable the emulated EEPROM system for EEPROM quick writes
• Set the FCNFG.EEERDY flag
0x00
Make FlexRAM available for emulated EEPROM:
• Clear the FCNFG[RAMRDY] and FCNFG[EEERDY] flags
• Write a background of ones to all FlexRAM locations
• Copy-down existing EEPROM data to FlexRAM
• Set the FCNFG[EEERDY] flag
After clearing CCIF to launch the Set FlexRAM Function command, the FTFC sets the
function of the FlexRAM based on the FlexRAM Function Control Code.
Chapter 32 Flash Memory Module (FTFC)
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
NXP Semiconductors 775