MC9S12XDP512CFU
| Model | MC9S12XDP512CFU |
| Description | 16-BIT, FLASH, 40MHz, MICROCONTROLLER, PQFP80 |
| PDF file | Total 1348 pages (File size: 8M) |
| Chip Manufacturer | PHILIPS |
Chapter 29 128 Kbyte Flash Module (S12XFTX128K1V1)
Table 29-8. FCNFG Field Descriptions
Field
7
CBEIE
Description
Command Buffer Empty Interrupt Enable
— The CBEIE bit enables an interrupt in case of an empty command
buffer in the Flash module.
0 Command buffer empty interrupt disabled.
1 An interrupt will be requested whenever the CBEIF flag (see
Section 29.3.2.6, “Flash Status Register
(FSTAT)”)
is set.
Command Complete Interrupt Enable
— The CCIE bit enables an interrupt in case all commands have been
0 Command complete interrupt disabled.
1 An interrupt will be requested whenever the CCIF flag (see
Section 29.3.2.6, “Flash Status Register (FSTAT)”)
is set.
Enable Security Key Writing
0 Flash writes are interpreted as the start of a command write sequence.
1 Writes to Flash array are interpreted as keys to open the backdoor. Reads of the Flash array return invalid
data.
6
CCIE
5
KEYACC
29.3.2.5
Flash Protection Register (FPROT)
The FPROT register defines which Flash sectors are protected against program or erase operations.
7
6
5
4
3
2
1
0
R
FPOPEN
W
Reset
F
RNV6
FPHDIS
F
F
F
FPHS
F
FPLDIS
F
F
FPLS
F
= Unimplemented or Reserved
Figure 29-8. Flash Protection Register (FPROT)
All bits in the FPROT register are readable and writable with restrictions (see
Section 29.3.2.5.1, “Flash
Protection Restrictions”)
except for RNV[6] which is only readable.
address 0x7F_FF0D. To change the Flash protection that will be loaded during the reset sequence, the
upper sector of the Flash memory must be unprotected, then the Flash Protect/Security byte located as
described in
Table 29-1
must be reprogrammed.
Trying to alter data in any protected area in the Flash memory will result in a protection violation error and
the PVIOL flag will be set in the FSTAT register. The mass erase of a Flash block is not possible if any of
the Flash sectors contained in the Flash block are protected.
MC9S12XDP512 Data Sheet, Rev. 2.21
Freescale Semiconductor
1199
