Datasheet

Chapter 2 256 Kbyte Flash Module (S12FTS256K2V1)
MC9S12E256 Data Sheet, Rev. 1.10
Freescale Semiconductor 99
2.3.2.10 Flash Address Registers (FADDR)
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.
2.3.2.11 Flash Data Registers (FDATA)
The banked FDATAHI and FDATALO registers are the Flash data registers.
Table 2-20. FCTL Field Descriptions
Field Description
7-0
NV[7:0]
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.
Module Base + 0x0008
76543210
R FADDRHI
W
Reset 00000000
= Unimplemented or Reserved
Figure 2-14. Flash Address High Register (FADDRHI)
Module Base + 0x0009
76543210
R FADDRLO
W
Reset 00000000
= Unimplemented or Reserved
Figure 2-15. Flash Address Low Register (FADDRLO)
Module Base + 0x000A
76543210
R FDATAHI
W
Reset 00000000
= Unimplemented or Reserved
Figure 2-16. Flash Data High Register (FDATAHI)