mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 797
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mc9s12xd256
Manufacturer Part Number
mc9s12xd256
Description
Hcs12x Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12XD256.pdf
(1350 pages)
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21.4.2.2.2
Freescale Semiconductor
Bus cycle ->
ECLK phase
ADDR[22:20] / ACC[2:0]
ADDR[19:16] / IQSTAT[3:0] ...
ADDR[15:0] / IVD[15:0]
DATA[15:0] (write)
R/W
Bus cycle ->
ECLK phase
ADDR[22:20] / ACC[2:0]
ADDR[19:16] / IQSTAT[3:0] ...
ADDR[15:0] / IVD[15:0]
DATA[15:0] (write)
R/W
Bus cycle ->
ECLK phase
ADDR[22:20] / ACC[2:0]
ADDR[19:16] / IQSTAT[3:0] ...
ADDR[15:0] / IVD[15:0]
DATA[15:0] (write)
R/W
Write Access Timing
...
...
...
...
...
...
addr 0
high
?
0
Table 21-14. Write Access (n–1 Cycles)
Table 21-13. Write Access (2 Cycles)
Table 21-12. Write Access (1 Cycle)
...
...
...
...
...
...
...
...
...
...
...
...
1
MC9S12XDP512 Data Sheet, Rev. 2.17
iqstat-1
acc 0
low
addr 0
addr 0
?
0
high
high
Access #0
?
0
?
0
1
1
addr 0
iqstat -1
high
iqstat-1
acc 0
acc 0
0
low
low
Access #0
Access #0
?
0
?
0
data 0
2
iqstat 0
000
low
addr 0
addr 1
x
0
high
high
Access #1
1
0
data 0
data 0
2
2
addr 0
iqstat 0
iqstat 0
high
acc 1
0
000
low
low
Chapter 21 External Bus Interface (S12XEBIV2)
x
1
x
0
data 1
3
0000
000
low
addr 2
addr 1
x
0
high
high
Access #2
Access #1
1
1
...
...
...
...
...
...
3
3
iqstat 1
data 2
acc 2
acc 1
0000
low
low
addr 1
x
1
x
x
1
high
Access #1
1
...
...
...
...
...
...
...
...
...
...
...
...
...
...
n
acc 1
0000
low
x
x
1
797
...
...
...
...
...
...
...
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