mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 99

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

2.3.2.9
The banked FCTL register is the Flash control register.
All bits in the FCTL register are readable but are not writable.
The FCTL register is loaded from the Flash Configuration Field byte at $FF0E during the reset sequence,
indicated by F in
2.3.2.10
The banked FADDRHI and FADDRLO registers are the Flash address registers.
All FADDRHI and FADDRLO bits are readable but are not writable. After an array write as part of a
command write sequence, the FADDR registers will contain the mapped MCU address written.
Freescale Semiconductor
NV[7:0]
Reset
Reset
Reset
Field
7-0
W
W
W
R
R
R
NV7
Nonvolatile Bits — The NV[7:0] bits are available as nonvolatile bits. Refer to the Device User Guide for proper
use of the NV bits.
Flash Control Register (FCTL)
Flash Address Registers (FADDR)
F
7
7
0
7
0
Figure
= Unimplemented or Reserved
= Unimplemented or Reserved
= Unimplemented or Reserved
2-13.
NV6
6
F
6
0
6
0
Figure 2-15. Flash Address Low Register (FADDRLO)
Figure 2-14. Flash Address High Register (FADDRHI)
Figure 2-13. Flash Control Register (FCTL)
Table 2-19. FCTL Field Descriptions
NV5
MC9S12E256 Data Sheet, Rev. 1.08
5
F
5
0
5
0
NV4
F
4
4
0
4
0
FADDRLO
FADDRHI
Description
NV3
F
3
3
0
3
0
Chapter 2 256 Kbyte Flash Module (FTS256K2V1)
NV2
2
F
2
0
2
0
NV1
1
F
1
0
1
0
NV0
0
F
0
0
0
0
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