
MC68F375
CDR MoneT FLASH FOR THE IMB3 (CMFI)
MOTOROLA
REFERENCE MANUAL
Rev. 25 June 03
10-31
Failure to read each page that is being programmed after each program pulse may
result in the loss of information in the CMFI EEPROM array.
While this will not physically damage the array a full erase of all blocks being pro-
grammed must be done before the CMFI EEPROM can be used reliably.
10.6.6.3 Programming Shadow Information
Programming the shadow information uses the same procedure as programming the
array except that only the program page buffer associated with the lowest array block
will be used to program the shadow information. Before starting the program sequence
SIE must be a 1.
The first 32 bytes (IADDR[7:0] = 0x00 to 0x1F) of the 256 bytes of shadow locations
are withheld by Motorola for the shadow information words and future applications.
The remaining 224 bytes are available for general use. Programming of these 32 bytes
affects the reset configuration of the CMFI EEPROM. The register shadow information
word and location within the shadow row is presented in the following table. Registers
not listed in this table do not require shadow information for reset configuration but
their shadow locations are withheld from general use by Motorola for future
applications.
Table 10-14 Results of Programming Margin Read
Current Data in the Pro-
gram Page Buffer1
NOTES:
1. 0 = bit needs to further programming
1 = bit does not need further programming
Current State of Bit
Data Read During
Margin Read2
2. A “0” read during the margin read means that the bit does NOT need further programming. A “1” means
the bit needs to be programmed further.
New Data for the
Program Page Buffer1
0
Programmed (0)
0
1
0
Erased (1)
1
0
1
Programmed (0)
0
1
Erased (1)
0
1
Table 10-15 Register Shadow Information
Register Name
Register Address
Shadow Row Address (addr[7:0])
CMFIMCR
0x00 0000
0x00
CMFIBAR
0x00 0008
0x08
CMFICTL1
0x00 000C
0x0C
CMFIBS0
0x00 0010
0x10
CMFIBS1
0x00 0012
0x12
CMFIBS2
0x00 0014
0x14
CMFIBS3
0x00 0016
0x16
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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