W90220F Winbond Electronics Corp America, W90220F Datasheet - Page 31

• Manufacturer Part Number: W90220F
• Description: Pa-risc Embedded Controller
• Manufacturer: Winbond Electronics Corp America

The above information is the exclusive intellectual property of Winbond Electroncs Corp. and shall not be dsiclosed or distributed or reproduced without permission from
Winbond.
31
Bits 2-3 DRAM Bank 2's RAM type & Bank-size
Bits 4-5 DRAM Bank 1's RAM type & Bank-size
Bits 6-7 DRAM Bank 0's RAM type & Bank-size
RAM Configuration_1 Register (RAMconf1)
Index : 0x29
Bit 0
Bit 1
Bit 2
PAREN
0
(The definition is the same as RAMconf0[0:1])
(The definition is the same as RAMconf0[0:1])
(The definition is the same as RAMconf0[0:1])
Enable parity-check of memory data bus
DRAM bank_3 enable
DRAM bank_2 enable
Note * : Don't care pins (only for testing issue).
0 = Disable parity check
1 = Enable parity check
0 = Disable
1 = Enable
2 Banks
4 Banks
RAMen3
MA5
MA4
MA3
MA2
MA1
MA0
1
** : A0 is MSB and A31is LSB.
Bank Selector
RAMen2
A17
A16
A15
A14
A13
A12
A10, A11
Read/Write
2
A11
A26
A25
A24
A23
A22
A21
RAMen1
3
Bank Selector
A17
A16
A15
A14
A13
A12
A8, A9
A9
RAMen0 DIS384K
A26
A25
A24
A23
A22
A21
4
Power-on Default : 0x0
Bank Selector
A17
A16
A15
A14
A13
A12
A6, A7
A7
5
A26
A25
A24
A23
A22
A21
Bank Selector
FW
A17
A16
A15
A14
A13
A12
6
A4, A5
A5
A26
A25
A24
A23
A22
A21
FR
7
W90220F
Version 0.84