Flash Memory
MPC5606S Microcontroller Reference Manual, Rev. 7
616 Freescale Semiconductor
17.3.6.11 User Test 0 register (UT0)
The User Test feature gives the user of the flash module the ability to perform test features on the flash
memory.
The User Test 0 Register allows to control the way in which the flash memory content check is done.
Bits MRE, MRV, AIS, EIE and DSI7-0 of the User Test 0 Register are not accessible whenever
MCR.DONE or UT0.AID are low: reading returns indeterminate data while writing has no effect.
Address Offset: 0x0003C Reset value: 0x00000001
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
UTE 0 0 0 0 0 0 0 DSI7 DSI6 DSI5 DSI4 DSI3 DSI2 DSI1 DSI0
rw/0 r/0 r/0 r/0 r/0 r/0 r/0 r/0 rw/0 rw/0 rw/0 rw/0 rw/0 rw/0 rw/0 rw/0
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
0 0 0 0 0 0 0 0 0 X MRE MRV EIE AIS AIE AID
r/0 r/0 r/0 r/0 r/0 r/0 r/0 r/0 r/0 rw/0 rw/0 rw/0 rw/0 rw/0 rw/0 r/1
Figure 17-34. User Test 0 register (UT0)
Table 17-51. UT0 field descriptions
Field Description
0 UTE: User Test Enable (Read/Clear)
This status bit gives indication when User Test is enabled. All bits in UT0-2 and UMISR0-4 are locked when
this bit is 0.
This bit is not writeable to a 1, but may be cleared. The reset value is 0.
The method to set this bit is to provide a password, and if the password matches, the UTE bit is set to
reflect the status of enabled, and is enabled until it is cleared by a register write.
For UTE the password 0xF9F99999 must be written to the UT0 register.
1:7 Reserved (Read Only).
Write these bits has no effect and read these bits always outputs 0.
8:15 DSI7-0: Data Syndrome Input 7-0 (Read/Write)
These bits represent the input of Syndrome bits of ECC logic used in the ECC Logic Check. The DSI7-0
correspond to the 8 syndrome bits on a double word.
These bits are not accessible whenever MCR.DONE or UT0.AID are low: reading returns indeterminate
data while writing has no effect.
0: The syndrome bit is forced at 0.
1: The syndrome bit is forced at 1.
16:24 Reserved (Read Only).
Write these bits has no effect and read these bits always outputs 0.
25 Reserved (Read/Write).
This bit can be written and its value can be read back, but there is no function associated.
This bit is not accessible whenever MCR.DONE or UT0.AID are low: reading returns indeterminate data
while writing has no effect.
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