Fujitsu FR60 Hardware Manual page 188

CHAPTER 4 EXTERNAL BUS INTERFACE
[bit27] WBST (Write BurST enable): Write burst setting
Set this bit to select whether to burst-write for write access.
Table 4.2-27 lists the settings for burst write.
Table 4.2-27 Settings for Burst Write
WBST
0
1
For connecting FCRAM, be sure to set the bit to "1".
FCRAM supports neither burst read nor single write mode.
[bit26] BANK (BANK type select): Bank number setting
Set this bit to the number of banks of SDRAM to be connected.
Table 4.2-28 lists the settings for bank number.
Table 4.2-28 Settings for Bank Number
BANK
0
1
[bit25, bit24] ABS1, ABS0 (Active Bank Select): Setting of active bank number
Set these bits to the maximum number of banks to be made active simultaneously.
Table 4.2-29 lists the settings for the number of active banks.
Table 4.2-29 Settings for the Number of Active Banks
ABS1
0
0
1
1
168
ABS0
0
1
0
1
Settings for burst write
Single write
Burst write
Settings for bank number
2 banks
4 banks
Number of active banks
1 bank
2 banks
3 banks
4 banks