S912XEG384J3VA Datasheet, PDF (1133/1324 Pages) Freescale Semiconductor, Inc – MC9S12XEP100 Reference Manual Covers MC9S12XE Family

Register
FSTAT
FERSTAT
Chapter 28 768 KByte Flash Module (S12XFTM768K4V2)
Table 28-76. EEPROM Emulation Query Command Error Handling
Error Bit
ACCERR
FPVIOL
MGSTAT1
MGSTAT0
EPVIOLIF
Error Condition
Set if CCOBIX[2:0] != 000 at command launch
Set if a Load Data Field command sequence is currently active
Set if command not available in current mode (see Table 28-30)
None
None
None
None
28.4.2.22 Partition D-Flash Command
The Partition D-Flash command allows the user to allocate sectors within the D-Flash block for
applications and a partition within the buffer RAM for EEPROM access. The D-Flash block consists of
128 sectors with 256 bytes per sector. The Erase All Blocks command must be run prior to launching the
Partition D-Flash command.
Table 28-77. Partition D-Flash Command FCCOB Requirements
CCOBIX[2:0]
FCCOB Parameters
000
0x20
Not required
001
Number of 256 byte sectors for the D-Flash user partition (DFPART)
010
Number of 256 byte sectors for buffer RAM EEE partition (ERPART)
Upon clearing CCIF to launch the Partition D-Flash command, the following actions are taken to define a
partition within the D-Flash block for direct access (DFPART) and a partition within the buffer RAM for
EEE use (ERPART):
• Validate the DFPART and ERPART values provided:
— DFPART <= 128 (maximum number of 256 byte sectors in D-Flash block)
— ERPART <= 16 (maximum number of 256 byte sectors in buffer RAM)
— If ERPART > 0, 128 - DFPART >= 12 (minimum number of 256 byte sectors in the D-Flash
block required to support EEE)
— If ERPART > 0, ((128-DFPART)/ERPART) >= 8 (minimum ratio of D-Flash EEE space to
buffer RAM EEE space to support EEE)
• Erase verify the D-Flash block and the EEE nonvolatile information register
• Program DFPART to the EEE nonvolatile information register at global address 0x12_0000 (see
Table 28-7)
Freescale Semiconductor
MC9S12XE-Family Reference Manual Rev. 1.25
1133