sc9s12hy64j0vllr Freescale Semiconductor, Inc, sc9s12hy64j0vllr Datasheet - Page 548

• Manufacturer Part Number: sc9s12hy64j0vllr
• Description: S12 Microcontrollers Mcu 16-bit Hcs12 Cisc 32kb Flash 5v Tray
• Manufacturer: Freescale Semiconductor, Inc

32 KByte Flash Module (S12FTMRC32K1V1)
15.4.5.4
The Read Once command provides read access to a reserved 64 byte field (8 phrases) located in the
nonvolatile information register of P-Flash. The Read Once field is programmed using the Program Once
command described in
block containing the Program Once reserved field to avoid code runaway.
Upon clearing CCIF to launch the Read Once command, a Read Once phrase is fetched and stored in the
FCCOB indexed register. The CCIF flag will set after the Read Once operation has completed. Valid
phrase index values for the Read Once command range from 0x0000 to 0x0007. During execution of the
Read Once command, any attempt to read addresses within P-Flash block will return invalid data.
15.4.5.5
The Program P-Flash operation will program a previously erased phrase in the P-Flash memory using an
embedded algorithm.
548
8
1
2
As defined by the memory map for FTMRC64K1.
As found in the memory map for FTMRC64K1.
Register
FSTAT
Read Once Command
Program P-Flash Command
A P-Flash phrase must be in the erased state before being programmed.
Cumulative programming of bits within a Flash phrase is not allowed.
CCOBIX[2:0]
MGSTAT1
MGSTAT0
ACCERR
Error Bit
FPVIOL
Section
Table 15-37. Read Once Command FCCOB Requirements
000
001
010
011
100
101
Table 15-38. Read Once Command Error Handling
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
15.4.5.6. The Read Once command must not be executed from the Flash
Set if CCOBIX[2:0] != 001 at command launch
Set if command not available in current mode (see
Set if an invalid phrase index is supplied
None
Set if any errors have been encountered during the read
Set if any non-correctable errors have been encountered during the read
Read Once phrase index (0x0000 - 0x0007)
0x04
CAUTION
Read Once word 0 value
Read Once word 1 value
Read Once word 2 value
Read Once word 3 value
FCCOB Parameters
Error Condition
Not Required
Table
15-27)
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