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PC912XDP512F0MPVR 데이터시트(PDF) 1051 Page - Freescale Semiconductor, Inc

부품명 PC912XDP512F0MPVR
상세설명  HCS12X Microcontrollers
PDF  1348 Pages
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제조업체  FREESCALE [Freescale Semiconductor, Inc]
홈페이지  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

PC912XDP512F0MPVR 데이터시트(HTML) 1051 Page - Freescale Semiconductor, Inc

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Chapter 25 2 Kbyte EEPROM Module (S12XEETX2KV1)
MC9S12XDP512 Data Sheet, Rev. 2.21
Freescale Semiconductor
1053
Figure 25-17. Determination Procedure for PRDIV8 and EDIV Bits
PRDIV8 = 1
yes
no
PRDIV8 = 0 (reset)
>12.8 MHz?
EECLK = (PRDCLK)/(1+EDIV[5:0])
PRDCLK = oscillator_clock
PRDCLK = oscillator_clock/8
PRDCLK[MHz]*(5+Tbus[
µs])
no
EDIV[5:0]=PRDCLK[MHz]*(5+Tbus[
µs])–1
yes
START
Tbus < 1
µs?
an integer?
EDIV[5:0]=INT(PRDCLK[MHz]*(5+Tbus[
µs]))
1/EECLK[MHz] + Tbus[ms] > 5
AND
EECLK > 0.15 MHz
?
END
yes
no
EDIV[5:0] > 4?
ALL COMMANDS IMPOSSIBLE
yes
no
ALL COMMANDS IMPOSSIBLE
no
TRY TO DECREASE Tbus
yes
oscillator_clock



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