Datasheet

DocID024030 Rev 10 187/239
STM32F427xx STM32F429xx Electrical characteristics
198
NAND controller waveforms and timings
Figure 69 through Figure 72 represent synchronous waveforms, and Table 100 and
Table 101 provide the corresponding timings. The results shown in this table are obtained
with the following FMC configuration:
• COM.FMC_SetupTime = 0x01;
• COM.FMC_WaitSetupTime = 0x03;
• COM.FMC_HoldSetupTime = 0x02;
• COM.FMC_HiZSetupTime = 0x01;
• ATT.FMC_SetupTime = 0x01;
• ATT.FMC_WaitSetupTime = 0x03;
• ATT.FMC_HoldSetupTime = 0x02;
• ATT.FMC_HiZSetupTime = 0x01;
• Bank = FMC_Bank_NAND;
• MemoryDataWidth = FMC_MemoryDataWidth_16b;
• ECC = FMC_ECC_Enable;
• ECCPageSize = FMC_ECCPageSize_512Bytes;
• TCLRSetupTime = 0;
• TARSetupTime = 0.
In all timing tables, the
T
HCLK
is the HCLK clock period.
Table 99. Switching characteristics for PC Card/CF read and write cycles
in I/O space
(1)(2)
Symbol Parameter Min Max Unit
tw(NIOWR) FMC_NIOWR low width 8T
HCLK
− 0.5 - ns
tv(NIOWR-D) FMC_NIOWR low to FMC_D[15:0] valid - 0 ns
th(NIOWR-D) FMC_NIOWR high to FMC_D[15:0] invalid 9T
HCLK
− 2-ns
td(NCE4_1-NIOWR) FMC_NCE4_1 low to FMC_NIOWR valid - 5T
HCLK
ns
th(NCEx-NIOWR) FMC_NCEx high to FMC_NIOWR invalid 5T
HCLK
-ns
td(NIORD-NCEx) FMC_NCEx low to FMC_NIORD valid - 5T
HCLK
ns
th(NCEx-NIORD) FMC_NCEx high to FMC_NIORD) valid 6T
HCLK
+2 - ns
tw(NIORD) FMC_NIORD low width 8T
HCLK
− 0.5 8T
HCLK
+0.5 ns
tsu(D-NIORD) FMC_D[15:0] valid before FMC_NIORD high T
HCLK
-ns
td(NIORD-D) FMC_D[15:0] valid after FMC_NIORD high 0 - ns
1. C
L
= 30 pF.
2. Guaranteed by characterization results.
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