Renesas F-ZTAT H8 Series Hardware Manual page 199

Section 7 Refresh Controller
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
CAS CAS CAS 4-Mbit DRAM Chips with 9-Bit Row
Figure 7.14 Setup Procedure for Multiple 2CAS
Address and 9-Bit Column Address (16-Mbyte Mode)
Rev. 3.00 Mar 21, 2006 page 171 of 814
REJ09B0302-0300