S912XEG128J2VAL
| Model | S912XEG128J2VAL |
| Description | IC,MICROCONTROLLER,16-BIT,CPU12 CPU,CMOS,QFP,112PIN,PLASTIC |
| PDF file | Total 1327 pages (File size: 7M) |
| Chip Manufacturer | ROCHESTER |
Chapter 5 External Bus Interface (S12XEBIV4)
Table 5-14. Read Access (n–1 Cycles)
DATA[15:0] (external read)
RW
...
...
?
1
z
1
z
1
z
1
z
1
z
1
...
...
data 0
1
z
1
...
...
Because of an order from the United States International Trade Commission, BGA-packaged product lines and part numbers indicated here currently are not
available from Freescale for import or sale in the United States prior to September 2010: S12XE products in 208 MAPBGA packages
5.4.2.4.2
Write Access Timing
Table 5-15. Write Access (1 Cycle)
Access #0
Bus cycle ->
ECLK phase
ADDR[22:20] / ACC[2:0]
ADDR[15:0] / IVD[15:0]
DATA[15:0] (write)
RW
...
...
...
addr 0
?
0
0
...
...
...
high
Access #1
2
high
addr 1
low
acc 1
iqstat 0
x
data 0
1
1
data 1
Access #2
3
high
addr 2
low
acc 2
iqstat 1
x
data 2
1
1
...
...
...
...
...
...
...
1
low
acc 0
iqstat -1
?
ADDR[19:16] / IQSTAT[3:0] ...
Table 5-16. Write Access (2 Cycles)
Access #0
Bus cycle ->
ECLK phase
ADDR[22:20] / ACC[2:0]
ADDR[15:0] / IVD[15:0]
DATA[15:0] (write)
RW
...
...
...
addr 0
?
0
0
0
...
...
...
high
Access #1
2
3
low
000
iqstat 0
x
data 0
0
1
high
addr 1
low
acc 1
0000
x
x
1
...
...
...
...
...
...
...
1
low
acc 0
iqstat-1
?
addr 0
high
ADDR[19:16] / IQSTAT[3:0] ...
Table 5-17. Write Access (n–1 Cycles)
Access #0
Bus cycle ->
ECLK phase
ADDR[22:20] / ACC[2:0]
ADDR[15:0] / IVD[15:0]
DATA[15:0] (write)
RW
...
...
...
addr 0
?
0
0
0
0
...
...
...
high
Access #1
3
...
low
000
addr 0
0000
x
data 0
0
0
...
1
...
...
...
...
addr 1
high
1
low
acc 0
iqstat-1
?
addr 0
high
2
low
000
iqstat 0
x
high
n
low
acc 1
0000
x
x
1
...
...
...
...
...
...
...
ADDR[19:16] / IQSTAT[3:0] ...
5.4.2.4.3
Read-Write-Read Access Timing
Table 5-18. Interleaved Read-Write-Read Accesses (1 Cycle)
Access #0
Access #1
2
Access #2
3
...
Bus cycle ->
...
1
MC9S12XE-Family Reference Manual , Rev. 1.19
252
Freescale Semiconductor
