Intel PXA250 and PXA210 Applications Processors
Intel PXA250 and PXA210 Applications Processors
Intel PXA250 and PXA210 Applications Processors
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Power <strong>and</strong> Clocking<br />
Table 8-6. <strong>PXA250</strong> <strong>and</strong> <strong>PXA210</strong> VCCN vs. VCCQ (Sheet 2 of 6)<br />
Pin<br />
Pin<br />
Count<br />
Alt_fn<br />
1-(in)<br />
Alt_fn<br />
2-(in)<br />
Alt_fn<br />
1-(out)<br />
Alt_fn<br />
2-(out)<br />
Signal Description <strong>and</strong><br />
Comments<br />
Power<br />
Supply<br />
DQM(1:0) 2<br />
nSDCS(3:2) 2<br />
nSDCS(1:0) 2<br />
SDCKE(1:0) 2<br />
Main Memory Bus SDRAM byte<br />
selects<br />
Main Memory Bus SDRAM chip<br />
selects<br />
Main Memory Bus SDRAM chip<br />
selects<br />
Main Memory Bus SDRAM clock<br />
enable<br />
VCCN<br />
VCCN<br />
VCCN<br />
VCCN<br />
SDCLK(2) 1 Main Memory Bus SDRAM clocks VCCN<br />
SDCLK(1:0) 2 Main Memory Bus SDRAM clocks VCCN<br />
RD/nWR 1 CC Steering Signal VCCN<br />
CS(0) 1 Static chip selects VCCN<br />
GP15 1 nCS_1 Active low chip select 1 VCCN<br />
GP18 1 RDY Ext. Bus Ready VCCN<br />
GP19 1 DREQ[1] Ext. Bus Master Request VCCN<br />
GP20 1 DREQ[0] Ext. Bus Master Request VCCN<br />
GP21 1 General Purpose I/O pin VCCN<br />
GP22 1 General Purpose I/O pin VCCN<br />
GP33 1 nCS[5] Active low chip select 5 VCCN<br />
GP48 1 nPOE Output Enable for Card Space VCCN<br />
GP49 1 nPWE Write Enable for Card Space VCCN<br />
GP50 1 nPIOR I/O Read for Card Space VCCN<br />
GP51 1 nPIOW I/O Write for Card Space VCCN<br />
GP52 1 nPCE[1] Card Enable for Card Space VCCN<br />
GP53 1<br />
MMCCLK<br />
nPCE[2]<br />
Card Enable for Card Space<br />
MMC CLock<br />
VCCN<br />
GP54 1<br />
MMCCLK<br />
pSKTSEL<br />
MMC CLock<br />
Socket Select for Card Space<br />
VCCN<br />
GP55 1 nPREG Card Address bit 26 VCCN<br />
GP56 1 nPWAIT Wait signal for Card Space VCCN<br />
GP57 1 nIOIS16<br />
Bus Width select for I/O Card<br />
Space<br />
VCCN<br />
GP78 1 nCS[2] Active low chip select 2 VCCN<br />
GP79 1 nCS[3] Active low chip select 3 VCCN<br />
GP80 1 nCS[4] Active low chip select 4 VCCN<br />
<strong>PXA250</strong> <strong>and</strong> <strong>PXA210</strong> <strong>Applications</strong> <strong>Processors</strong> Design Guide 8-7