MAC7100 MOTOROLA [Motorola, Inc], MAC7100 Datasheet - Page 33

• Manufacturer Part Number: MAC7100
• Description: MAC7100 Microcontroller Family Hardware Specifications
• Manufacturer: MOTOROLA [Motorola, Inc]

Electrical Characteristics
3.12 FlexCAN Electrical Specifications
3.13 Program Flash and Data Flash Timing
3.13.1 NVM timing
The time base for all NVM program or erase operations is derived from the system clock divided by two
(Fsys/2). A minimum system frequency f
The NVM modules do not have any means to monitor the frequency and will not prevent program or erase
operation at frequencies above or below the specified minimum. Attempting to program or erase the NVM
modules at a lower frequency a full program or erase transition is not assured.
The Flash and Data Flash program and erase operations are timed using a clock derived from the system
frequency using the CFMCLKD register. The frequency of this clock must be set within the limits specified
as f
and maximum f
3.13.1.1 Single Word Programming
The programming time for single word programming is dependant on the bus frequency as a well as on the
frequency f
3.13.1.2 Burst Programming
This applies only to the Flash where up to 32 words in a row can be programmed consecutively using burst
programming by keeping the command pipeline filled. The time to program a consecutive word can be
calculated as:
The time to program a whole row is:
Burst programming is more than 2 times faster than single word programming.
33
Conditions are shown in Table 6 unless otherwise noted
Num C
Y1
Y2
NVMOP
P FlexCAN Wake-up dominant pulse filtered
P FlexCAN Wake-up dominant pulse passed
Characteristics
. The minimum program and erase times shown in Table 36 are calculated for maximum f
NVMOP
bus
Unless otherwise noted the abbreviation NVM (Non-Volatile Memory) is
used for both program Flash and data Flash.
. The maximum times are calculated for minimum f
and can be calculated according to the following formula.
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
MAC7100 Microcontroller Family Hardware Specifications
Table 35. FlexCAN Wake-up Pulse Characteristics
Freescale Semiconductor, Inc.
Rating
For More Information On This Product,
t
t
swpgm
t
bwpgm
brpgm
Go to: www.freescale.com
NVMfsys
=
=
=
9
t
4
swpgm
⋅
NOTE
⋅
is required for performing program or erase operations.
----------------- -
f
NVMOP
----------------- -
f
NVMOP
1
1
+
Symbol
31 t
t
t
WUP
WUP
+
+
⋅
25
9
bwpgm
⋅
⋅
-------- -
f
-------- -
f
bus
1
bus
1
Min
—
5
NVMOP
and a f
Typ
—
—
bus
of 2 MHz.
Max
—
2
MOTOROLA
NVMOP
Unit
µs
µs