LM4F111E5QR Datasheet, PDF (374/1114 Pages) Texas Instruments – Microcontroller

System Control
Register 92: EEPROM Power Control (PCEEPROM), offset 0x958
The PCEEPROM register controls the power provided to the EEPROM module. Clearing the bit
corresponding to the module indicates to the hardware that firmware requests that the peripheral
be unpowered. When the bit in this register is set, the module’s state is not retained. Software should
perform a peripheral reset using the SREEPROM register if the active mode changes and the
corresponding bit in the RCGCEEPROM, SCGCEEPROM, or DCGCEEPROM register is a 1 or the
Pn bit is changed from a 0 to a 1. Software must re-initialize the module when re-enabled due to
the loss of state.
Note: The EEPROM module does not currently have the ability to respond to the power down
request. Setting a bit in this register has no effect on power consumption. This register is
provided for future software compatibility.
EEPROM Power Control (PCEEPROM)
Base 0x400F.E000
Offset 0x958
Type R/W, reset 0x0000.0001
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
reserved
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
reserved
P0
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Bit/Field
31:1
0
Name
reserved
P0
Type
RO
R/W
Reset
0
1
Description
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
EEPROM Module Power Control
The value of this bit does not have meaning unless the corresponding,
active mode RCGCEEPROM, SCGCEEPROM or DCGCEEPROM bit
is cleared.
Value Description
1 The EEPROM module is powered, but does not receive a clock.
In this case, the module is inactive.
This configuration provides the second-lowest power
consumption of the module because it consumes only leakage
current.
0 The EEPROM module is not powered and does not receive a
clock. In this case, the module’s state is not retained.
This configuration provides the lowest power consumption state
of the module because it consumes no dynamic nor leakage
current.
374
April 25, 2012
Texas Instruments-Advance Information