HD6433044 Datasheet, PDF (179/867 Pages) Hitachi Semiconductor – Hitachi Single-Chip Microcomputer

Set area 3 for 16-bit access
Set P8₁ DDR to 1 for CS₃ output
Set RTCOR
Set bits CKS2 to CKS0 in RTMCSR
Write H'23 in RFSHCR
Wait for DRAM to be initialized
DRAM can be accessed
Figure 7-8 Setup Procedure for 2WE 1-Mbit DRAM (1-Mbyte Mode)
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