MC9S12T64 Datasheet, PDF (222/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Flash EEPROM 64K
START
Tbus < 1µs?
no
PROGRAM/ERASE IMPOSSIBLE
yes
PRDIV8=0 (reset)
oscillator clock
no
12.8MHz?
yes
PRDIV8=1
PRDCLK=oscillator clock/8
PRDCLK=oscillator clock
no
PRDCLK[MHz]*(5+(1/BusClock)[µs] )
an integer?
yes
FDIV[5:0]=PRDCLK[MHz]*(5+(1/BusClock) [µs] ) - 1
TRY TO INCREASE BusClock
FCLK=(PRDCLK)/(1+FDIV[5:0])
FDIV[5:0]=INT(PRDCLK[MHz]*(5+(1/BusClock)[µs]))
(1/FCLK + 1/BusClock) [µs] > 5
AND
FCLK > 0.15MHz
?
no
yes
END
yes
FDIV[5:0]> 4?
no
PROGRAM/ERASE IMPOSSIBLE
Figure 27 PRDIV8 and FDIV bits Determination Procedure
MC9S12T64Revision 1.1.1
222
Flash EEPROM 64K
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