User manual

Appendix A Electrical Characteristics
MC9S12XDP512 Data Sheet, Rev. 2.11
Freescale Semiconductor 955
Table A-27. Example 1a: Normal Expanded Mode Timing V
DD35
= 5.0 V (EWAITE = 0)
No. C Characteristic Symbol Min Max Unit
— — Frequency of internal bus f
i
D.C. 40.0 MHz
— — Internal cycle time t
cyc
25 ∞ ns
— — Frequency of external bus f
o
D.C. 20.0 MHz
1 — External cycle time (selected by EXSTR) t
cyce
50 ∞ ns
2 D Address
1
valid to RE fall
1
Includes the following signals: ADDRx, UDS, LDS, and CSx.
t
ADRE
5—ns
3 D Pulse width,
RE PW
RE
35 — ns
4 D Address
1
valid to WE fall t
ADWE
5—ns
5 D Pulse width,
WE PW
WE
23 — ns
6 D Read data setup time (if ITHRS = 0) t
DSR
24 — ns
D Read data setup time (if ITHRS = 1) t
DSR
28 — ns
7 D Read data hold time t
DHR
0—ns
8 D Read enable access time t
ACCR
11 — ns
9 D Write data valid to
WE fall t
WDWE
7—ns
10 D Write data setup time t
DSW
31 — ns
11 D Write data hold time t
DHW
8—ns