SC9S12XS256J1MAA FREESCALE [Freescale Semiconductor, Inc], SC9S12XS256J1MAA Datasheet - Page 629
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SC9S12XS256J1MAA
Manufacturer Part Number
SC9S12XS256J1MAA
Description
HCS12 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.SC9S12XS256J1MAA.pdf
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20.3.2.11.1 FCCOB - NVM Command Mode
NVM command mode uses the indexed FCCOB register to provide a command code and its relevant
parameters to the Memory Controller. The user first sets up all required FCCOB fields and then initiates
the command’s execution by writing a 1 to the CCIF bit in the FSTAT register (a 1 written by the user
clears the CCIF command completion flag to 0). When the user clears the CCIF bit in the FSTAT register
all FCCOB parameter fields are locked and cannot be changed by the user until the command completes
(as evidenced by the Memory Controller returning CCIF to 1). Some commands return information to the
FCCOB register array.
The generic format for the FCCOB parameter fields in NVM command mode is shown in
The return values are available for reading after the CCIF flag in the FSTAT register has been returned to
1 by the Memory Controller. Writes to the unimplemented parameter fields (CCOBIX = 110 and CCOBIX
= 111) are ignored with reads from these fields returning 0x0000.
Table 20-24
contains the command code, followed by the parameters for this specific Flash command. For details on
the FCCOB settings required by each command, see the Flash command descriptions in
Freescale Semiconductor
Offset Module Base + 0x000A
Offset Module Base + 0x000B
Reset
Reset
W
W
R
R
shows the generic Flash command format. The high byte of the first word in the CCOB array
0
0
7
7
Figure 20-17. Flash Common Command Object Low Register (FCCOBLO)
Figure 20-16. Flash Common Command Object High Register (FCCOBHI)
CCOBIX[2:0]
000
001
010
Table 20-24. FCCOB - NVM Command Mode (Typical Usage)
0
0
6
6
Byte
S12XS Family Reference Manual, Rev. 1.09
LO
LO
LO
HI
HI
HI
0
0
5
5
FCCOB Parameter Fields (NVM Command Mode)
FCMD[7:0] defining Flash command
0
0
4
4
CCOB[15:8]
CCOB[7:0]
0, Global address [22:16]
Global address [15:8]
Global address [7:0]
Data 0 [15:8]
Data 0 [7:0]
0
0
3
3
64 KByte Flash Module (S12XFTMR64K1V1)
0
0
2
2
0
0
1
1
Section
Table
20-24.
20.4.2.
0
0
0
0
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