Intel PXA250 and PXA210 manual Memory Bus and PCMCIA AC Specifications, Power and Clocking, 8-15

Power and Clocking

Table 8-10. Sleep Mode Timing Specifications (Sheet 2 of 2)

Symbol	Description	Min	Typical	Max
tD_FAULT	Delay between PWR_EN asserted and nVDD_FAULT	—	—	10 ms
	deasserted
tDSM_OUT	Delay between PWR_EN asserted and nRESET_OUT	28.0 ms	—	80 ms
	deasserted, OPDE Set
tDSM_OUT_O	Delay between PWR_EN asserted and nRESET_OUT	10.35 ms	—	10.5 ms
	deasserted, OPDE Clear

8.6Memory Bus and PCMCIA AC Specifications

This section gives the timing information for the following types of memory:

•SRAM / ROM / Flash / Synchronous Fast Flash Asynchronous writes (Table 8-11)

•Variable Latency I/O (Table 8-12)

•Card Interface (PCMCIA or Compact Flash) (Table 8-13)

•Synchronous Memories (Table 8-14)

Table 8-11. SRAM / ROM / Flash / Synchronous Fast Flash AC Specifications (3.3 V)

			MEMCLK Frequency (MHz)
Symbol	Description						Notes
		99.5	118.0	132.7	147.5	165.9
	SRAM / ROM / Flash / Synchronous Fast Flash (WRITES) (Asynchronous)
tromAS	MA(25:0) setup to nCS, nOE, nSDCAS (as nADV)	10 ns	8.5 ns	7.5 ns	6.8 ns	6 ns	1
	asserted
tromAH	MA(25:0) hold after nCS, nOE, nSDCAS (as nADV)	10 ns	8.5 ns	7.5 ns	6.8 ns	6 ns	1
	deasserted
tromASW	MA(25:0) setup to nWE asserted	30 ns	25.5 ns	22.5 ns	20.4 ns	18 ns	2
tromAHW	MA(25:0) hold after nWE deasserted	10 ns	8.5 ns	7.5 ns	6.8 ns	6 ns	1
tromCES	nCS setup to nWE asserted	20 ns	17 ns	15 ns	13.6 ns	12 ns	3
tromCEH	nCS hold after nWE deasserted	10 ns	8.5 ns	7.5 ns	6.8 ns	6 ns	1
tromDS	MD(31:0), DQM(3:0) write data setup to nWE asserted	10 ns	8.5 ns	7.5 ns	6.8 ns	6 ns	1
tromDSWH	MD(31:0), DQM(3:0) write data setup to nWE	20 ns	17 ns	15 ns	13.6 ns	12 ns	3
	deasserted
tromDH	MD(31:0), DQM(3:0) write data hold after nWE	10 ns	8.5 ns	7.5 ns	6.8 ns	6 ns	1
	deasserted
tromNWE	nWE high time between beats of write data	20 ns	17 ns	15 ns	13.6 ns	12 ns	3
NOTES:

1.This number represents 1 MEMCLK period

2.This number represents 3 MEMCLK periods

3.This number represents 2 MEMCLK periods

PXA250 and PXA210 Applications Processors Design Guide 8-15