PXS20RM Datasheet, PDF (575/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Flash Memory
Table 23-10. ADR Field Descriptions (continued)
Field
Description
11-28
ADDR[17:0]
Address. The ADR register provides the first failing address in the event of ECC event error (MCR[EER]
set), single bit correction (MCR[SBC] set), as well as providing the address of a failure that may have
occurred in a state machine operation (MCR[PEG] cleared). ECC event errors take priority over single
bit corrections, which take priority over state machine errors. This is especially valuable in the event of
a RWW operation, where the read senses an ECC error or single bit correction, and the state machine
fails simultaneously. This address is always a Double Word address that selects 64 bits.
The ADR register is writable, and can be used in the UTEST ECC Logic Check. If the ECC logic check
is enabled (UT0[EIE] = 1) then the ADR register will not update for ECC event error, single bit correction
or state machine errors.
If MCR[EER] or MCR[SBC] are set, the ADR register is locked from writing. MCR[PEG] does not affect
the writability of the ADR register.
29-31 Reserved, reset to 0.
23.1.6.8 Bus Interface Unit 4 Register (BIU4)
The BIU4 register implements the user option bits described in Section 23.1.7, User option bits.
23.1.6.9 User Test 0 Register
The User Test 0 Register (UT0) provides a means to control UTest. The UTest mode gives the users of the
flash module the ability to perform test features on the flash. This register is only writable when the flash
is put into UTest mode by writing a passcode.
The following field and bit descriptions fully define the UT0 register.
Offset 0x003C
Access: User read/write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R
UTE
W
SBC
E
0
0
0
0
0
0
DSI
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
R0 0 0 0 0 0 0 0 0 0
AID
MRE MRV EIE AIS AIE
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
Figure 23-10. UT0 Register
UT0 register functions, as shown in Table 23-11.
Freescale Semiconductor
PXS20 Microcontroller Reference Manual, Rev. 1
23-25