Hitachi H8/3048 Hardware Manual page 185

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Set area 3 for 16-bit access
Set P8 DDR to 1 for CS output
1 3
Set RTCOR
Set bits CKS2 to CKS0 in RTMCSR
Write H'3F in RFSHCR
Wait for DRAM to be initialized
DRAM can be accessed
Figure 7-14 Setup Procedure for Multiple 2CAS 4-Mbit DRAM Chips with 9-Bit
Row Address and 9-Bit Column Address (16-Mbyte Mode)
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