S912XEG128J2VAL
| Model | S912XEG128J2VAL |
| Description | IC,MICROCONTROLLER,16-BIT,CPU12 CPU,CMOS,QFP,112PIN,PLASTIC |
| PDF file | Total 1327 pages (File size: 7M) |
| Chip Manufacturer | ROCHESTER |
Chapter 24 128 KByte Flash Module (S12XFTM128K2V1)
NOTE
Field margin levels can be used to check that Flash memory contents have
adequate margin for data retention at the normal level setting. If unexpected
results are encountered when checking Flash memory contents at field
margin levels, the Flash memory contents should be erased and
reprogrammed.
24.4.2.14 Full Partition D-Flash Command
The Full 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.
Table 24-61. Full Partition D-Flash Command FCCOB Requirements
CCOBIX[2:0]
000
001
010
0x0F
FCCOB Parameters
Not required
Number of 256 byte sectors for the D-Flash user partition (DFPART)
Number of 256 byte sectors for buffer RAM EEE partition (ERPART)
Upon clearing CCIF to launch the Full 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 <= 8 (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 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 24-7)
• Program a duplicate DFPART to the EEE nonvolatile information register at global address
0x12_0002 (see
Table 24-7)
• Program ERPART to the EEE nonvolatile information register at global address 0x12_0004 (see
Table 24-7)
• Program a duplicate ERPART to the EEE nonvolatile information register at global address
0x12_0006 (see
Table 24-7)
MC9S12XE-Family Reference Manual , Rev. 1.19
878
Freescale Semiconductor
Because of an order from the United States International Trade Commission, BGA-packaged product lines and part numbers indicated here currently are not
available from Freescale for import or sale in the United States prior to September 2010: S12XE products in 208 MAPBGA packages
CAUTION
Field margin levels must only be used during verify of the initial factory
programming.
