XPC850ZT50BU Datasheet, PDF (16/76 Pages) Motorola, Inc – Communications Controller Hardware Specifications

Layout Practices
Table 6-6. Bus Operation Timing ¹ (continued)
Num
Characteristic
50 MHz
66 MHz
80 MHz
Cap Load
FFACT (default Unit
Min Max Min Max Min Max
50 pF)
B29h WE[0–3] negated to D[0–31], 25.00 — 39.00 — 31.00 — 1.375 50.00
ns
DP[0–3] high-Z GPCM write
access TRLX = 0, CSNT = 1,
EBDF = 1
B29i CS negated to D[0–31], DP[0–3] 25.00 — 39.00 — 31.00 — 1.375 50.00
ns
high-Z GPCM write access,
TRLX = 1, CSNT = 1, ACS = 10
or ACS = 11, EBDF = 1
B30 CS, WE[0–3] negated to A[6–31] 3.00 — 6.00 — 4.00 — 0.250 50.00
ns
invalid
GPCM write access ⁹
B30a WE[0–3] negated to A[6–31]
8.00 — 13.00 — 11.00 — 0.500
50.00
ns
invalid
GPCM write access, TRLX = 0,
CSNT = 1, CS negated to
A[6–31] invalid GPCM write
access TRLX = 0, CSNT =1,
ACS = 10 or ACS = 11, EBDF =
0
B30b WE[0–3] negated to A[6–31] 28.00 — 43.00 — 36.00 — 1.500 50.00
ns
invalid
GPCM write access, TRLX = 1,
CSNT = 1. CS negated to
A[6–31] Invalid GPCM write
access TRLX = 1, CSNT = 1,
ACS = 10 or ACS = 11, EBDF =
0
B30c WE[0–3] negated to A[6–31]
5.00 — 8.00 — 6.00 — 0.375
50.00
ns
invalid
GPCM write access, TRLX = 0,
CSNT = 1. CS negated to
A[6–31] invalid GPCM write
access, TRLX = 0, CSNT = 1,
ACS = 10 or ACS = 11, EBDF =
1
B30d WE[0–3] negated to A[6–31] 25.00 — 39.00 — 31.00 — 1.375 50.00
ns
invalid GPCM write access
TRLX = 1, CSNT =1, CS
negated to A[6–31] invalid
GPCM write access TRLX = 1,
CSNT = 1, ACS = 10 or ACS =
11, EBDF = 1
B31 CLKOUT falling edge to CS valid 1.50 6.00 1.50 6.00 1.50 6.00 —
- as requested by control bit
CST4 in the corresponding word
in the UPM
50.00
ns
16
MPC850 (Rev. A/B/C) Hardware Specifications
MOTOROLA