Acrosser AR-B8172 - Manual (Page 15)

AR-B8172 User Manual
 SRAM Access Configuration:
1. Enable SRAM access: SW4.PIN7 is “OFF” to Enable SRAM. If PIN7 is “On” then SRAM
access will be disable.
SW4 Logical description
OFF H
ON L
2. SRAM Address Selection:
SRAM Start Address SRAMSEG_SEL0 SRAMSEG_SEL1
D000:0000 L L
D400:0000 H H
D800:0000 H L
DC00:0000 L H
2. Device IO Address Selection:
Device IO Address CPLD_ADR3 CPLD_ADR2 CPLD_ADR1 CPLD_ADR0
200h L L L L
214h L
L L H
2A4h L L H L
2F4h L L H H
2C0h L H L L
2C4h L H L H
2D0h L H H L
2D4h L H H H
2E0h H L L L
2E4h H L H L
3. RAM is 512KB with 32 banks, each bank is 16KB size.
※ Others mode not descript on the above tables are reserved.
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