CDR3 Flash (UC3F) EEPROM
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
21-11
21.2.1.4
UC3F EEPROM High Voltage Control Register (UC3FCTL)
The UC3F EEPROM high voltage control register is used to control the program and erase operations of
the UC3F EEPROM module.
21:22
SBLKL
Small block location code. There are three possible locations for the small blocks: 1) a small
block may be placed in the lowest numbered host block and the highest numbered host blocks,
2) a small block may be placed in the lowest numbered host block and the second lowest
numbered host block, and 3) a small block may be placed in the second highest numbered host
block and the highest numbered host block.
00 unused
01 small blocks are part of the two highest numbered blocks of the UC3F array
10 small blocks are part of the two lowest numbered blocks of the UC3F array
11 small blocks are part of the lowest and highest numbered blocks of the UC3F array
23:31
FLASHID
Flash module identification code. The FLASHID value is assigned by Freescale and used
internally for tracking purposes. The FLASHID field is read only and writes have no effect.
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field HVS PEGOOD PEFI EPEE B0EM
—
SBBLOCK
HRESET
0
0
0
X
1
X
2
000_0000_0000
Addr
0x2F C808
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
LSB
31
Field
BLOCK
—
CSC
—
HSUS
PE
SES EHV
HRESET
0000_0000_0000_0000
1 Value is set by the current status of the EPEE pin.
2 Value is set by the current status of the B0EPEE pin.
Figure 21-4. UC3F EEPROM High Voltage Control Register (UC3FCTL)
Table 21-5. UC3FCTL Bit Descriptions
Bits
Name
Description
0
HVS
High voltage status. The HVS bit is for status only, and writes to HVS have no effect. During a
program or erase operation, HVS is set (HVS = 1) to indicate when high voltage operations are
in progress. The HVS bit will negate itself when the program or erase operation completes
successfully, EHV negates during program or erase to terminate the program/erase operation,
HSUS is asserted to suspend the program/erase operation, resetting the module, or the internal
hardware program/erase controller times out.
0 no program or erase of the UC3F array or shadow information or CENSOR bits in progress
1 program or erase of the UC3F array or shadow information or CENSOR bits in progress
Table 21-4. UC3FMCRE Bit Descriptions (continued)
Bits
Name
Description
Summary of Contents for MPC561
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