MC9S12XDP512MAG Freescale, MC9S12XDP512MAG Datasheet - Page 1207
MC9S12XDP512MAG
Manufacturer Part Number
MC9S12XDP512MAG
Description
Manufacturer
Freescale
Datasheet
1.MC9S12XDP512MAG.pdf
(1348 pages)
Specifications of MC9S12XDP512MAG
Cpu Family
HCS12
Device Core Size
16b
Frequency (max)
40MHz
Interface Type
CAN/I2C/SCI/SPI
Total Internal Ram Size
32KB
# I/os (max)
119
Number Of Timers - General Purpose
12
Operating Supply Voltage (typ)
2.5/5V
Operating Supply Voltage (max)
2.75/5.5V
Operating Supply Voltage (min)
2.35/3.15V
On-chip Adc
2(24-chx10-bit)
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 125C
Operating Temperature Classification
Automotive
Mounting
Surface Mount
Pin Count
144
Package Type
LQFP
Program Memory Type
Flash
Program Memory Size
512KB
Lead Free Status / RoHS Status
Compliant
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29.4.1.1
Prior to issuing any Flash command after a reset, the user is required to write the FCLKDIV register to
divide the oscillator clock down to within the 150 kHz to 200 kHz range. Since the program and erase
timings are also a function of the bus clock, the FCLKDIV determination must take this information into
account.
If we define:
then FCLKDIV register bits PRDIV8 and FDIV[5:0] are to be set as described in
For example, if the oscillator clock frequency is 950kHz and the bus clock frequency is 10MHz,
FCLKDIV bits FDIV[5:0] should be set to 0x04 (000100) and bit PRDIV8 set to 0. The resulting FCLK
frequency is then 190kHz. As a result, the Flash program and erase algorithm timings are increased over
the optimum target by:
If the oscillator clock frequency is 16MHz and the bus clock frequency is 40MHz, FCLKDIV bits
FDIV[5:0] should be set to 0x0A (001010) and bit PRDIV8 set to 1. The resulting FCLK frequency is then
182kHz. In this case, the Flash program and erase algorithm timings are increased over the optimum target
by:
If the FCLKDIV register is written, the FDIVLD bit is set automatically. If the FDIVLD bit is 0, the
FCLKDIV register has not been written since the last reset. If the FCLKDIV register has not been written
to, the Flash command loaded during a command write sequence will not execute and the ACCERR flag
in the FSTAT register will set.
Freescale Semiconductor
•
•
•
FCLK as the clock of the Flash timing control block
Tbus as the period of the bus clock
INT(x) as taking the integer part of x (e.g. INT(4.323) = 4)
Writing the FCLKDIV Register
Program and erase command execution time will increase proportionally
with the period of FCLK. Because of the impact of clock synchronization
on the accuracy of the functional timings, programming or erasing the Flash
memory cannot be performed if the bus clock runs at less than 1 MHz.
Programming or erasing the Flash memory with FCLK < 150 kHz should
be avoided. Setting FCLKDIV to a value such that FCLK < 150 kHz can
destroy the Flash memory due to overstress. Setting FCLKDIV to a value
such that (1/FCLK+Tbus) < 5 s can result in incomplete programming or
erasure of the Flash memory cells.
MC9S12XDP512 Data Sheet, Rev. 2.21
200 190
200 182
–
–
CAUTION
200 100
200 100
Chapter 29 128 Kbyte Flash Module (S12XFTX128K1V1)
=
=
5%
9%
Figure
29-22.
1209
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