W90210F Winbond Electronics Corp America, W90210F Datasheet - Page 28

• Manufacturer Part Number: W90210F
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

29h
03h
04h
05h
06h
07h
08h
09h
0ah
0bh
Index
20h
21h
22h
23h
24h
25h
26h
27h
28h
DRAM Controller Register
[0:7]
[0:7]
[0:7]
[0:7]
[0:7]
[0:7]
[0:7]
[0:7]
[0:7]
Bit No.
[0:7]
[0:7]
[0:7]
[0:7]
[0:7]
[0:7]
[0:7]
[0:7]
[0:7]
[0:7]
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ROM bank 1 base address register[8:15]
ROM bank 2 base address register[0:7]
ROM bank 2 base address register[8:15]
ROM bank 3 base address register[0:7]
ROM bank 3 base address register[8:15]
The register 0~7 has no default value.
[0:3] ROM bank 0 size.
[4:7] ROM bank 1 size.
[0:3] ROM bank 2 size.
[4:7] ROM bank 3 size.
0XXX
1000
1100
The default value is 0.
[0:1] bank 3 band width: 00 8_bit, 01
[2:3] bank 2 band width: 00 8_bit, 01
[4:5] bank 1 band width: 00 8_bit, 01
[6:7] bank 0 band width: 00 8_bit, 01
The default width of bank 0~3 is set by memory data bus bit 30 and 31.
[0:2] ROM access wait state.
000
010
100
110
The default wait state is 8.
[3] access ROM bank0 only. Default bank0 only.
[4] LA mode. Default LA mode.
Description
DRAM bank 0 base address register[0:7]
DRAM bank 0 base address register[8:11]
DRAM bank 1 base address register[0:7]
DRAM bank 1 base address register[8:11]
DRAM bank 2 base address register[0:7]
DRAM bank 2 base address register[8:11]
DRAM bank 3 base address register[0:7]
DRAM bank 3 base address register[8:11]
The registers 20~27 has no default value.
[0:1] DRAM bank 3 type : 00
[2:3] DRAM bank 2 type : 00
[4:5] DRAM bank 1 type : 00
[6:7] DRAM bank 0 type : 00
Default 256K type.
[0] Parity check enable. (default 0)
[1] Enable DRAM bank 3.(default 0)
[2] Enable DRAM bank 2.(default 0)
[3] Enable DRAM bank 1.(default 0)
[4] Enable DRAM bank 0.(default 0)
[5] Disable DRAM address range from A0000 to FFFFF.(default 0)
[6] Fast write mode enable.(default 0)
[7] EDO fast page mode enable.(default 0)
wait 2 state. 001
wait 4 state. 011
wait 6 state. 101
wait 8 state. 111
64K, 1001
1M, 1101
disable.
128K, 1010
2M,
wait 3 state.
wait 5 state.
wait 7 state.
wait 9 state.
28
1110
256K, 01
256K, 01
256K, 01
256K, 01
256K, 1011
4M,
16_bit, 10
16_bit, 10
16_bit, 10
16_bit, 10
1111
1M, 10
1M, 10
1M, 10
1M, 10
512K,
16M.
32_bit, 11
32_bit, 11
32_bit, 11
32_bit, 11
4M, 11
4M, 11
4M, 11
4M, 11
16M,
16M,
16M,
16M,
reserved
reserved
reserved
reserved
W90210F
Version 1.4, 10/8/97