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R5F56216BDFP Datasheet(PDF) 5 Page - Renesas Technology Corp

Part # R5F56216BDFP
Description  100 MHz 32-bit RX MCU with FPU, 165 DMIPS, up to 512-Kbyte Flash, Ethernet, USB 2.0
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

R5F56216BDFP Datasheet(HTML) 5 Page - Renesas Technology Corp

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RX62N Group and RX621 Group
16-Bit SDRAM Connection and Access Examples
R01AN0585EJ0202 Rev.2.02
Page 5 of 22
Feb 14, 2014
Table 3
SDRAM Initialization Auto Refresh Control Register (SDIR)
Bit Name
Setting Value
Function
Initialization auto refresh period bits
(ARFI[3:0])
0001b
4 cycles
Initialization auto refresh count bits
(ARFC[3:0])
0010b
2 times
Initialization precharge cycle count setting bits
(PRC[2:0])
000b
3 cycles
PRA
DSL
RFA
SDCLK
SDRAM command
Initialization
precharge cycle
DSL
DSL
DSL
DSL
RFA
DSL
DSL
DSL
SDIR.PRC: "000" = 3 cycles
SDIR.ARFI: "0001" = 4 cycles
SDIR.ARFC: "0010" = 2 times
DSL: Device deselect command
RFA: Auto refresh command
PRA: All bank precharge command
Initialization auto refresh
cycle
Initialization auto refresh
cycle
Figure 2 Initialization Sequence Timing


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