Appendix A Electrical Characteristics
MC9S12XDP512 Data Sheet, Rev. 2.11
Freescale Semiconductor 955
Table A-27. Example 1a: Normal Expanded Mode Timing VDD35 = 5.0 V (EWAITE = 0)
No. C Characteristic Symbol Min Max Unit
— — Frequency of internal bus fiD.C. 40.0 MHz
— — Internal cycle time tcyc 25 ∞ns
— — Frequency of external bus foD.C. 20.0 MHz
1 — External cycle time (selected by EXSTR) tcyce 50 ∞ns
2 D Address1 valid to RE fall
1Includes the following signals: ADDRx, UDS, LDS, and CSx.
tADRE 5—ns
3 D Pulse width, RE PWRE 35 — ns
4 D Address1 valid to WE fall tADWE 5—ns
5 D Pulse width, WE PWWE 23 — ns
6 D Read data setup time (if ITHRS = 0) tDSR 24 — ns
D Read data setup time (if ITHRS = 1) tDSR 28 — ns
7 D Read data hold time tDHR 0—ns
8 D Read enable access time tACCR 11 — ns
9 D Write data valid to WE fall tWDWE 7—ns
10 D Write data setup time tDSW 31 — ns
11 D Write data hold time tDHW 8—ns