Texas Instruments TM4C1294NCPDT User Manual

Register 12: Memory Timing Parameter Register 0 for Main Flash and EEPROM
(MEMTIM0), offset 0x0C0
The MEMTIM0 register provides timing parameters for the main Flash and EEPROM memories.
The timing parameters apply to the memory while the system is in run or sleep mode; the clocking
for these modes is consistent and unchanged since the system clock frequency and source remains
unchanged during transitions between run-to-sleep and sleep-back-to-run. Writes to MEMTIM0 do
not have any effect on system state; the register contents are applied only when the MEMTIMU bit
in the RSCLKCFG register is set. Doing so allows the software to execute out of the same memory
system for which the timing parameters are being modified.
Depending on the CPU frequency, the application must program specific values into the fields of
the Memory Timing Parameter Register 0 for Main Flash and EEPROM (MEMTIM0). The following
table details the bit field values that are required for the given CPU frequency ranges.
Table 5-12. MEMTIM0 Register Configuration versus Frequency
FWS/EWSFBCE/EBCEFBCHT/EBCHTTime Period Range (t) in nsCPU Frequency range (f) in
MHz
0x010x062.516
0x100x262.5 > t ≥ 2516 < f ≤ 40
0x200x325 > t ≥ 16.6740 < f ≤60
0x300x416.67 > t ≥ 12.560< f ≤80
0x400x512.5 > t ≥ 1080 < f ≤100
0x500x610 > t ≥ 8.33100< f ≤120
Note: The associated Flash and EEPROM fields in the MEMTIM0 register must be programmed
to the same values. For example, the FWS field must be programmed to the same value as
the EWS field.
Refer to “Flash Memory” on page 604 and “EEPROM” on page 615 for more information about Flash
and EEPROM programming.
Memory Timing Parameter Register 0 for Main Flash and EEPROM (MEMTIM0)
Base 0x400F.E000
Offset 0x0C0
Type RW, reset 0x0030.0030
16171819202122232425262728293031
EWSreservedEBCEEBCHTreserved
RWRWRWRWRWRWRWRWRWRWROROROROROROType
0000110000000000Reset
0123456789101112131415
FWSreservedFBCEFBCHTreserved
RWRWRWRWRWRWRWRWRWRWRWRWRWRWRWRWType
0000110000000000Reset
DescriptionResetTypeNameBit/Field
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.
0x0000.000ROreserved31:26
277June 18, 2014
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TM4C1294NCPDT Microcontroller

Texas Instruments TM4C1294NCPDT Specifications

General

Brand	Texas Instruments
Model	TM4C1294NCPDT
Category	Microcontrollers
Language	English