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PC912XDP512F0MPVR 데이터시트(PDF) 794 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) 794 Page - Freescale Semiconductor, Inc

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Chapter 21 External Bus Interface (S12XEBIV2)
MC9S12XDP512 Data Sheet, Rev. 2.21
796
Freescale Semiconductor
The following terminology is used:
‘addr’ — value(ADDRx); small letters denote the logic values at the respective pins
‘x’ — Undefined output pin values
‘z’ — Tristate pins
‘?’ — Dependent on previous access (read or write); IVDx: ‘ivd’ or ‘x’; DATAx: ‘data’ or ‘z’
21.4.2.2.1
Read Access Timing
Table 21-9. Read Access (1 Cycle)
Access #0
Access #1
Bus cycle ->
...
123
...
ECLK phase
...
high
low
high
low
high
low
...
ADDR[22:20] / ACC[2:0]
...
addr 0
acc 0
addr 1
acc 1
addr 2
acc 2
...
ADDR[19:16] / IQSTAT[3:0] ...
iqstat -1
iqstat 0
iqstat 1
...
ADDR[15:0] / IVD[15:0]
...
?
ivd 0
ivd 1
...
DATA[15:0] (internal read)
...
?
zz
z
z
z
...
DATA[15:0] (external read)
...
?
z
data 0
z
data 1
z
...
R/W
...
111111
...
Table 21-10. Read Access (2 Cycles)
Access #0
Access #1
Bus cycle ->
...
123
...
ECLK phase
...
high
low
high
low
high
low
...
ADDR[22:20] / ACC[2:0]
...
addr 0
acc 0
addr 0
000
addr 1
acc 1
...
ADDR[19:16] / IQSTAT[3:0] ...
iqstat-1
iqstat 0
0000
...
ADDR[15:0] / IVD[15:0]
...
?
x
ivd 0
...
DATA[15:0] (internal read)
...
?
zzzz
z
...
DATA[15:0] (external read)
...
?
z
z
z
data 0
z
...
R/W
...
111111
...
Table 21-11. Read Access (n–1 Cycles)
Access #0
Access #1
Bus cycle ->
...
123
...
n
...
ECLK phase
...
high
low
high
low
high
low
...
high
low
...
ADDR[22:20] / ACC[2:0]
...
addr 0
acc 0
addr 0
000
addr 0
000
...
addr 1
acc 1
...
ADDR[19:16] / IQSTAT[3:0] ...
iqstat-1
iqstat 0
0000
...
0000
...
ADDR[15:0] / IVD[15:0]
...
?
xx
...
ivd 0
...
DATA[15:0] (internal read)
...
?
zzzzz
...
z
z
...
DATA[15:0] (external read)
...
?
zzzzz
...
data 0
z
...
R/W
...
111111
...
11
...



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