MMCCMB2107 Freescale, MMCCMB2107 Datasheet - Page 199

• Manufacturer Part Number: MMCCMB2107
• Manufacturer: Freescale

Specifications of MMCCMB2107

• Lead Free Status / RoHS Status: Not Compliant

MMC2107 – Rev. 2.0
MOTOROLA
CAUTION:
NOTE:
Never stop or alter the system clock frequency during a program or
erase operation. Changing the clock frequency during program or erase
results in inaccurate pulse widths and variations in the charge pump
output.
CLKPE[1:0] — Clock Period Exponent Field
The CLKPE[1:0] bits are not write protected by the SES bit. Unless the
PAWS[2] bit is set, writes to CLKPE[1:0] in software should not be
changed if SES = 1.
ERASE CLKPE[1:0] Exponent (N)
1. The maximum system clock frequency is 33 MHz.
The default reset state of SCLKR[2:0] is 000, giving a clock scaling
of 1, and the program or erase pulse is not terminated until EHV is
cleared by a software write.
The read/write CLKPE[1:0] field selects the clock period exponent for
program/erase pulse timing. The second term of the timing control is
the clock multiplier, 2
period exponent bits (CLKPE[1:0]), and ERASE define the exponent
in the 2
the equation:
All of the exponents are shown in
The default reset state of CLKPE[1:0] is 00 .
Freescale Semiconductor, Inc.
0
1
Table 9-5. Clock Period Exponent and Pulse Width Range
For More Information On This Product,
Non-Volatile Memory FLASH (CMFR)
N
multiply of the clock period. The exponent, N, is defined by
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00
01
10
11
00
01
10
11
N = 5 + CLKPE[1:0] + [(ERASE)
N
. The program pulse number (pulse), clock
15
16
17
18
5
6
7
8
Pulse Width Range for all System Clock
2
Frequencies from 8.0 MHz to 33.0 MHz
N
Table
Minimum
4.096 ms
8.192 ms
16.39 ms
32.77 ms
16.00 s
4.00 s
8.00 s
32.0 s
1.25E – 7
Non-Volatile Memory FLASH (CMFR)
9-5.
Registers and Memory Map
2
10]
N
Maximum
128
349.5 ms
699.0 ms
0.34 ms
0.68 ms
1.36 ms
2.73 ms
1.398 s
2.796 s
Technical Data
8.33E – 8
(1)
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