Freescale Semiconductor HCS12X, Справочное руководство

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Appendix A Electrical Characteristics
MC9S12XE-Family Reference Manual Rev. 1.19
Freescale Semiconductor 1247
Table A-30. Example 1a: Normal Expanded Mode Timing 50 MHz bus (EWAIT disabled)
No. Characteristic Symbol
V
DD5
=5.0V V
DD5
=3.3V
Unit
C Min Max C Min Max
- Frequency of internal bus f
i
- D.C. 50.0 - D.C. 25.0 MHz
- Internal cycle time t
cyc
- 20
∞
- 40
∞
ns
- Frequency of external bus f
o
- D.C. 25.0 - D.C. 12.5 MHz
1 External cycle time (selected by EXSTR) t
cyce
- 40
∞
- 80
∞
ns
2 Address
1
valid to RE fall
1
Includes the following signals: ADDRx, UDS, LDS, and CSx.
t
ADRE
D 4 - D 13 - ns
3 Pulse width, RE PW
RE
D 28 - D 58 - ns
4 Address valid to WE fall t
ADWE
D 4 - D 15 - ns
5 Pulse width, WE PW
WE
D 18 - D 38 - ns
6 Read data setup time (if ITHRS = 0) t
DSR
D 19 - D 38 - ns
Read data setup time (if ITHRS = 1) t
DSR
D 23 - D N/A ns
7 Read data hold time t
DHR
D 0 - D 0 - ns
8 Read enable access time t
ACCR
D 4 - D 4 - ns
9 Write data valid to WE fall t
WDWE
D 5 - D 5 - ns
10 Write data setup time t
DSW
D 23 - D 43 - ns
11 Write data hold time t
DHW
D 6 - D 4 - ns
Because
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an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
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import
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sale
in
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States
prior
to
September
2010:
S12XE
products
in
208
MAPBGA
packages