mc9s12xf512 Freescale Semiconductor, Inc, mc9s12xf512 Datasheet - Page 826

• Manufacturer Part Number: mc9s12xf512
• Description: S12x Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 18 External Bus Interface (S12XEBIV4)
18.4.2.4.2
18.4.2.4.3
826
DATA[15:0] (external read)
RW
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)
RW
Bus cycle ->
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)
RW
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)
RW
Write Access Timing
Read-Write-Read Access Timing
Table 18-17. Interleaved Read-Write-Read Accesses (1 Cycle)
...
...
...
...
...
...
...
...
addr 0
high
...
?
1
?
0
MC9S12XF - Family Reference Manual, Rev.1.19
Table 18-16. Write Access (n–1 Cycles)
Table 18-13. Read Access (n–1 Cycles)
Table 18-15. Write Access (2 Cycles)
Table 18-14. Write Access (1 Cycle)
...
...
...
...
...
...
...
...
...
...
...
...
1
iqstat-1
Access #0
acc 0
low
addr 0
addr 0
1
?
0
z
high
high
Access #0
?
0
?
0
1
1
1
addr 0
iqstat -1
high
iqstat-1
acc 0
acc 0
1
0
z
low
low
?
0
Access #0
?
0
Access #0
data 0
2
iqstat 0
000
low
addr 0
addr 1
1
x
0
z
high
high
Access #1
Access #1
1
0
data 0
data 0
2
2
2
addr 0
iqstat 0
iqstat 0
high
acc 1
z
1
0
000
low
low
x
1
x
0
data 1
3
0000
000
low
addr 2
addr 1
z
1
x
0
high
high
Access #2
Access #1
1
1
Access #2
...
...
...
...
...
...
...
...
3
3
Freescale Semiconductor
iqstat 1
data 2
acc 2
acc 1
0000
3
low
low
data 0
addr 1
x
1
x
x
1
high
1
Access #1
1
...
...
...
...
...
...
...
...
...
...
...
...
...
...
n
acc 1
0000
low
...
z
1
x
x
1
...
...
...
...
...
...
...
...
...