HD6433044 Datasheet, PDF (190/867 Pages) Hitachi Semiconductor – Hitachi Single-Chip Microcomputer

Set P8₁ DDR to 1 for CS₃ output
Set RTCOR
Set bits CKS2 to CKS0 in RTMCSR
Write H'47 in RFSHCR
Wait for PSRAM to be initialized
PSRAM can be accessed
Figure 7-18 Setup Procedure for Pseudo-Static RAM
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