Flash Memory Array and Control
12-18
Freescale Semiconductor
PXR40 Microcontroller Reference Manual, Rev. 1
12.2.2.6
High Address Space Block Select Register (FLASH_x_HSR)
The High Address Space Block Select Register (FLASH_x_HSR) provides a means to select blocks to be
operated on during erase.
The following field and bit descriptions fully define the FLASH_x_HSR register (
FLASH_x_HSR register functions, as shown in
.
12.2.2.7
Address Register (FLASH_x_AR)
The Address register (FLASH_x_AR) provides the first failing address in the event module failures (ECC
or PGM/Erase state machine). This address is the internal array address. To convert to a logical system
address, a formula must be applied:
16–21
Reserved
22–31
LSEL[9:0]
Low Address Space Block Select. A value of 1 in the select register signifies that the block is selected
for erase. A value of 0 in the select register signifies that the block is not selected. The reset value for the
select registers is 0, or un-selected.
The blocks must be selected (or un-selected) before doing an erase interlock write as part of the erase
sequence. The select register is not writable once an interlock write is completed until
FLASH_x_MCR[DONE] is set at the completion of the requested operation, or if a high voltage operation
is suspended. LSEL is also not writeable during UTest operations, when AIE is high.
In the event that blocks are not present (due to configuration or total memory size), the corresponding
select bits default to un-selected, and are not writable. The reset value is always 0, and register writes
have no effect.
LSEL bits are mapped to block numbers in the same way as described for the LLOCK bits of the
FLASH_x_LMLR register.
Offset 0x0014 / 0x4014
Access: User read/write
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
HSEL
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 12-8. FLASH_x_HSR Register
Table 12-10. FLASH_x_HSR Field Descriptions
Field
Description
0–24
Reserved
26–31
HSEL[5:0]
High Address Space Block Select. High Address Block Select has the same characteristics as LSEL.
Table 12-9. FLASH_x_LMSR Field Descriptions (continued)
Field
Description
Summary of Contents for PXR4030
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