13-35
MB86R02 ‘Jade-D’ Hardware Manual V1.64
13.7.2.3
ODT Setting Procedure
The figure below is OCD adjustment setting procedure of SSTL_18 IO used for DDR2SDRAM IF.
With proceeding ODT setting, DDR2C automatically adjusts ODT of SSTL_18 IO; moreover, auto.
adjustment always operates during memory reading at normal operation.
Pin for ODT adjustment is MDQ[31:0], MDM[3:0], MDQSP[3:0], and MDQSN[3:0].
Write "0001" to DROBS register ( 84h)
START
Set to the mode using ODT auto. setting
value
ODT auto. adjustment on
Set ODT to on
50
Ω
/100
Ω
: ”003F”
75
Ω
/150
Ω
: ”0015”
Write "0083" to DROABA register ( 70h)
Write "003F" to DRIBSODT1 register ( 64h)
END
Summary of Contents for MB86R02
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Page 77: ...3 3 MB86R02 Jade D Hardware Manual V1 64 Figure 3 2 Memory map 2 ...
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Page 214: ...11 7 MB86R02 Jade D Hardware Manual V1 64 15 16 cycles initial value ...
Page 497: ...18 139 MB86R02 Jade D Hardware Manual V1 64 VSYNC is output 1 dot clock faster than HSYNC ...
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