Sharp LH79524 - Table 7-8. 16-Bit Wide Data Bus Address Mapping, SDRAM (BRC)

External Memory Controller LH79524/LH79525 User’s Guide
7-26 Version 1.0
NOTE: **The EMC always transfers 32 bits of data in each transaction. For chip selects with a 16-bit wide
data bus, the EMC performs two transfers: 1) a column transfer with the lowest bit set to 0, and 2) a
column transfer with the lowest bit set to 1.
Table 7-8. 16-bit Wide Data Bus Address Mapping, SDRAM (BRC)
16-BIT WIDE DEVICE 16M SDRAM (1M × 16, BRC)
External Address Pin, A[14:0] 14 13 1211109876543210
AHB Address To Row Address — 20/BA0 — — 19 18 17 16 15 14 13 12 11 10 9
AHB Address To Column Address — 20 ——AP––8765432**
16-BIT WIDE DEVICE 16M SDRAM (2M × 8, BRC)
External Address Pin, A[14:0] 14 13 1211109876543210
AHB Address To Row Address 21/BA1 — —— 2019181716151413121110
AHB Address To Column Address21/BA1 — ——AP–98765432**
16-BIT WIDE DEVICE 64M SDRAM (4M × 16, BRC)
External Address Pin, A[14:0] 14 13 1211109876543210
AHB Address To Row Address 21/BA1 22/BA0 — 20 19 18 17 16 15 14 13 12 11 10 9
AHB Address To Column Address21/BA122/BA0——AP——8765432**
16-BIT WIDE DEVICE 64M SDRAM (8M × 8, BRC)
External Address Pin, A[14:0] 14 13 1211109876543210
AHB Address To Row Address 23/BA1 22/BA0 — 21 20 19 18 17 16 15 14 13 12 11 10
AHB Address To Column Address 23 22/BA0——AP—98765432**
16-BIT WIDE DEVICE 128M SDRAM (8M × 16, BRC)
External Address Pin, A[14:0] 14 13 1211109876543210
AHB Address To Row Address 23/BA1 22/BA0 — 21 20 19 18 17 16 15 14 13 12 11 10
AHB Address To Column Address23/BA122/BA0——AP—98765432**
16-BIT WIDE DEVICE 128M SDRAM (16M × 8, BRC)
External Address Pin, A[14:0] 14 13 1211109876543210
AHB Address To Row Address 23/BA1 24/BA0 — 22 21 20 19 18 17 16 15 14 13 12 11
AHB Address To Column Address23/BA124/BA0——AP1098765432**
16-BIT WIDE DEVICE 256M SDRAM (16M × 16, BRC)
External Address Pin, A[14:0] 14 13 1211109876543210
AHB Address To Row Address 23/BA1 24/BA0 22 21 20 19 18 17 16 15 14 13 12 11 10
AHB Address To Column Address23/BA124/BA0——AP—98765432**
16-BIT WIDE DEVICE 256M SDRAM (32M × 8, BRC)
External Address Pin, A[14:0] 14 13 1211109876543210
AHB Address To Row Address 25/BA1 24/BA0 23 22 21 20 19 18 17 16 15 14 13 12 11
AHB Address To Column Address25/BA124/BA0——AP1098765432**
16-BIT WIDE DEVICE 512M SDRAM (32M × 16, BRC)
External Address Pin, A[14:0] 14 13 1211109876543210
AHB Address To Row Address 25/BA1 24/BA0 23 22 21 20 19 18 17 16 15 14 13 12 11
AHB Address To Column Address25/BA124/BA0——AP1098765432**
16-BIT WIDE DEVICE 512M SDRAM (64M × 8, BRC)
External Address Pin, A[14:0] 14 13 1211109876543210
AHB Address To Row Address 26/BA1 25/BA0 24 23 22 21 20 19 18 17 16 15 14 13 12
AHB Address To Column Address26/BA125/BA0—11AP1098765432**