TM4C129XNCZAD Datasheet, PDF (515/2191 Pages) Texas Instruments – Tiva Microcontroller

Tiva^™ TM4C129XNCZAD Microcontroller
Register 170: EEPROM Power Control (PCEEPROM), offset 0x958
Important: The EEPROM module does not currently provide the ability to respond to the power
down request. Setting a bit in this register has no effect on power consumption. This
register is defined for future software compatibility.
The PCEEPROM register controls the power applied to the EEPROM module. The function of this
bit depends on the current state of the device (Run, Sleep or Deep-Sleep mode) and value of the
corresponding bits in the RCGCEEPROM, SCGCEEPROM and DCGCEEPROM registers. If the
Rn, Sn, or Dn bit of the respective RCGCEEPROM, SCGCEEPROM and DCGCEEPROM registers
is 1 and the device is in that mode, the module is powered and receives a clock irrespective of what
the corresponding Pn bit in the PCEEPROM register is.
However, if the Rn, Sn, or Dn bit of the respective RCGCEEPROM, SCGCEEPROM and
DCGCEEPROM registers is 0 and the device is in that mode, then the module behaves differently
depending on the value of the corresponding Pn bit in the PCEEPROM register. In this case, when
the Pn bit is clear the module is not powered and does not receive a clock. If the Pn bit is set, the
module is powered but does not receive a clock. The table below details the differences.
Table 5-32. Module Power Control
Rn, Sn or Dn Value in
Respective RCGCx,
SCGCx, or DCGCx
Register
0
0
1
Pn Description
0 Module is not powered and does not receive a clock. In this case, the peripheral's
state is not retained.
This is the lowest power consumption state of any peripheral since it consumes no
dynamic nor leakage current. Hardware should perform a peripheral reset if the active
mode changes and the RCGCx, SCGCx, or DCGCx register is a 1 or the P0 bit is
changed to a 1.
Software must re-initialize the peripheral when re-enabled due to the loss of state.
1 Module is powered, but does not receive a clock.
In this case, the peripheral is inactive. This is the second-lowest power consumption
of any peripheral since it consumes only leakage current.
X Module is powered and receives a clock.
EEPROM Power Control (PCEEPROM)
Base 0x400F.E000
Offset 0x958
Type RW, 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
RW
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Bit/Field
31:1
Name
reserved
Type
RO
Reset
0
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.
June 18, 2014
515
Texas Instruments-Production Data