PXA250 INTEL [Intel Corporation], PXA250 Datasheet - Page 40

• Manufacturer Part Number: PXA250
• Description: Intel-R PXA250 and PXA210 Applications Processors
• Manufacturer: INTEL [Intel Corporation]

PXA250 and PXA210 — Electrical, Mechanical, and Thermal Specification
40
Table 17. SRAM / ROM / Flash / Synchronous Fast Flash AC Specifications (Sheet 2 of 2)
Table 18. Variable Latency I/O Interface AC Specifications
NOTES:
NOTES:
tromDSWH
tvlioDSWH
1. This number represents 1 MEMCLK period
2. This number represents 2 MEMCLK periods
3. This number represents 3 MEMCLK periods
tvlioASRW
tvlioRDYH
tvlioNPWE
1. This number represents 1 MEMCLK period
2. This number represents 2 MEMCLK periods
tromNWE
tvlioDHW
tvlioDSW
tvlioCEH
tvlioDHR
tvlioCES
Symbol
Symbol
tromDH
tvlioAS
tvlioAH
MD(31:0), DQM(3:0) write data setup to
nWE deasserted
MD(31:0), DQM(3:0) write data hold
after nWE deasserted
nWE high time between beats of write
data
MA(25:0) setup to nCS asserted
MA(25:0) setup to nOE or nPWE
asserted
MA(25:0) hold after nOE or nPWE
deasserted
nCS setup to nOE or nPWE asserted
nCS hold after nOE or nPWE
deasserted
MD(31:0), DQM(3:0) write data setup to
nPWE asserted
MD(31:0), DQM(3:0) write data setup to
nPWE deasserted
MD(31:0), DQM(3:0) hold after nPWE
deasserted
MD(31:0) read data hold after nOE
deasserted
RDY hold after nOE, nPWE deasserted
nPWE, nOE high time between beats of
write or read data
Description
Description
99.5
99.5
20
10
20
10
10
10
20
10
10
20
10
20
0
0
MEMCLK Frequency (MHz)
MEMCLK Frequency (MHz)
118.0
118.0
8.5
8.5
8.5
8.5
8.5
8.5
8.5
17
17
17
17
17
0
0
132.7
132.7
7.5
7.5
7.5
7.5
7.5
7.5
7.5
15
15
15
15
15
0
0
147.5
147.5
13.6
13.6
13.6
13.6
13.6
6.8
6.8
6.8
6.8
6.8
6.8
6.8
0
0
165.9
165.9
12
12
12
12
12
6
6
6
6
6
6
6
0
0
Units,
Notes
Units,
Notes
ns, 2
ns, 1
ns, 2
ns, 1
ns, 1
ns, 1
ns, 2
ns, 1
ns, 1
ns, 2
ns, 1
ns, 2
ns
ns
Datasheet