DP8418D-70 datasheet(9/28 Pages) NSC

Part #	DP8418D-70

Description	64k, 256k Dynamic RAM Controller/Drivers

Download	28 Pages

Scroll/Zoom	100%

Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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9 / 28 page

DP8419 Mode Descriptions (Continued)

DP8419 Interface Between System

DRAM Banks

TLF8396 – 5

FIGURE 1a DP8419 with any 16k DRAMS

TLF8396 – 6

Only LS 7 Bits of Refresh Counter used for the 7 Row Addresses

MSB not used but can toggle

FIGURE 1b DP8419 with 128 Row x 512 Column 64k DRAM

TLF8396 – 7

8 Bits of Refresh Counter Used

FIGURE 1c DP8419 with 256 Row x 256 Column 64k DRAM

TLF8396 – 8

All 9 Bits of Refresh Counter Used

FIGURE 1d DP8419 with 256k DRAMs

9

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