S912XEP768J5MAGR Freescale Semiconductor, S912XEP768J5MAGR Datasheet - Page 251
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S912XEP768J5MAGR
Manufacturer Part Number
S912XEP768J5MAGR
Description
16-bit Microcontrollers - MCU 16-bit 768K Flash
Manufacturer
Freescale Semiconductor
Datasheet
1.S912XEG128J2MAL.pdf
(1324 pages)
Specifications of S912XEP768J5MAGR
Rohs
yes
Core
HCS12X
Processor Series
MC9S12
Data Bus Width
16 bit
Maximum Clock Frequency
50 MHz
Program Memory Size
768 KB
Data Ram Size
48 KB
On-chip Adc
Yes
Operating Supply Voltage
3.3 V to 5 V
Operating Temperature Range
- 40 C to + 125 C
Package / Case
LQFP-144
Mounting Style
SMD/SMT
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
S912XEP768J5MAGR
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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The resulting timing pattern of the external bus signals is outlined in the following tables for read, write
and interleaved read/write accesses. Three examples represent different access lengths of 1, 2, and n–1 bus
cycles. Non-shaded bold entries denote all values related to Access #0.
The following terminology is used:
5.4.2.4.1
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] (internal read)
‘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’
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] (internal read)
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] (internal read)
DATA[15:0] (external read)
RW
Read Access Timing
...
...
...
...
...
addr 0
high
?
MC9S12XE-Family Reference Manual Rev. 1.25
Table 5-14. Read Access (n–1 Cycles)
...
...
...
...
...
...
...
Table 5-13. Read Access (2 Cycles)
...
...
...
...
...
...
...
1
Table 5-12. Read Access (1 Cycle)
iqstat-1
acc 0
low
addr 0
addr 0
?
z
high
high
?
?
1
?
?
1
1
1
addr 0
iqstat -1
high
iqstat-1
acc 0
acc 0
z
low
low
Access #0
?
1
Access #0
?
1
Access #0
z
z
z
z
2
iqstat 0
000
low
data 0
addr 0
addr 1
x
z
high
high
1
1
z
z
z
2
2
addr 0
iqstat 0
iqstat 0
high
acc 1
ivd 0
z
000
low
low
z
z
1
x
z
z
1
Chapter 5 External Bus Interface (S12XEBIV4)
3
0000
000
data 0
low
addr 2
data 1
addr 1
x
z
high
high
Access #1
Access #1
z
1
z
1
...
...
...
...
...
...
3
3
iqstat 1
acc 2
acc 1
0000
ivd 0
ivd 1
low
low
addr 1
z
z
1
z
z
1
high
Access #1
z
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
n
acc 1
ivd 0
0000
low
z
251
...
...
...
...
...
...
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