PXD20RM Datasheet, PDF (1221/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

bit or field, none of the given write access conditions is fulfilled, any write attempt to this register bit or
field is ignored without any notification. The values of the bits or fields are not changed.
The condition term [A or B] indicates that the register or field can be written to if at least one of the
conditions is fulfilled.
Table 35-6. Register Write Access Restrictions
Condition
Anytime
Disabled Mode
Normal Mode
Description
No write access restriction.
Write access only if the module is in Module Disable Mode.
Write access only if the module is in Normal Mode.
35.4.4.1.2 Register Write Access Requirements
All registers can be accessed with 8-bit, 16-bit and 32-bit wide operations. For some of the registers, at
least a 16/32-bit wide write access is required to ensure correct operation. This write access requirement
is stated in the detailed register description for each register affected
35.4.4.2 Module Configuration Register (QSPI_MCR)
The QSPI_MCR holds configuration data associated with QuadSPI operation.
Address: QSPI_BASE + 0x000
Write: Bits 0-15 Disabled Mode
All other fields: Anytime
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
0000000000001111
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
0000000
000
W
VMID
Reset 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 35-3. Module Configuration Register (QSPI_MCR)
CAUTION
The upper 16 bits of this register are writable in Disabled mode. Be sure that
these are always kept at the reset value indicated in Figure 35-3.
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
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