Revision: 5/17/02
GS88219/37AB
Datasheet Errata
Base datasheet:
GS88219/37AB, Rev.1.00, 3/2002
Product(s) covered in this supplement:
GS88219/37AB-250/225/200/166/150/133
Product specification(s) addressed by this supplement:
Bump R5
Note: The specifications cited in the base datasheet for the products addressed by this errata remain in force except where superseded by the information in this errata.
1/5
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Revision: 5/17/02
GS88219/37AB
Datasheet Errata
GS88237A Pad Out
119 Bump BGA—Top View
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4 |
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VDDQ |
A6 |
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A7 |
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A8 |
A9 |
VDDQ |
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ADSP |
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B |
NC |
NC |
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A4 |
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A15 |
A17 |
NC |
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ADSC |
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C |
NC |
A5 |
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A3 |
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VDD |
A14 |
A16 |
NC |
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D |
DQC4 |
DQC9 |
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VSS |
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ZQ |
VSS |
DQB9 |
DQB4 |
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E |
DQC3 |
DQC8 |
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VSS |
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VSS |
DQB8 |
DQB3 |
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F |
VDDQ |
DQC7 |
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VSS |
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VSS |
DQB7 |
VDDQ |
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G |
DQC2 |
DQC6 |
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DQB6 |
DQB2 |
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ADV |
B |
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H |
DQC1 |
DQC5 |
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VSS |
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VSS |
DQB5 |
DQB1 |
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GW |
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J |
VDDQ |
VDD |
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NC |
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VDD |
NC |
VDD |
VDDQ |
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K |
DQD1 |
DQD5 |
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VSS |
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CK |
VSS |
DQA5 |
DQA1 |
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L |
DQD2 |
DQD6 |
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D |
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SCD |
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DQA6 |
DQA2 |
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B |
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M |
VDDQ |
DQD7 |
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VSS |
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VSS |
DQA7 |
VDDQ |
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BW |
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N |
DQD3 |
DQD8 |
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VSS |
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A1 |
VSS |
DQA8 |
DQA3 |
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P |
DQD4 |
DQD9 |
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VSS |
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A0 |
VSS |
DQA9 |
DQA4 |
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VDDQ/ |
A13 |
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NC |
A2 |
LBO |
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VDD |
PE |
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DNU |
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T |
NC |
NC |
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A10 |
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A11 |
A12 |
NC |
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ZZ |
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U |
VDDQ |
TMS |
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TDI |
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TCK |
TDO |
NC |
VDDQ |
2/5
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Revision: 5/17/02
GS88219/37AB
Datasheet Errata
GS88219A Pad Out
119 Bump BGA—Top View
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VDDQ |
A6 |
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A8 |
A9 |
VDDQ |
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ADSP |
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B |
NC |
NC |
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A4 |
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A15 |
A17 |
NC |
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ADSC |
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C |
NC |
A5 |
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A3 |
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VDD |
A14 |
A16 |
NC |
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D |
DQB1 |
NC |
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VSS |
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ZQ |
VSS |
DQA9 |
NC |
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E |
NC |
DQB2 |
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VSS |
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VSS |
NC |
DQA8 |
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E |
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F |
VDDQ |
NC |
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VSS |
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VSS |
DQA7 |
VDDQ |
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G |
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NC |
DQB3 |
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NC |
NC |
DQA6 |
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ADV |
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H |
DQB4 |
NC |
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VSS |
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VSS |
DQA5 |
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GW |
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J |
VDDQ |
VDD |
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NC |
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VDD |
NC |
VDD |
VDDQ |
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K |
NC |
DQB5 |
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VSS |
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CK |
VSS |
NC |
DQA4 |
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L |
DQB6 |
NC |
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SCD |
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A |
DQA3 |
NC |
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B |
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M |
VDDQ |
DQB7 |
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VSS |
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VSS |
NC |
VDDQ |
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BW |
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N |
DQB8 |
NC |
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VSS |
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A1 |
VSS |
DQA2 |
NC |
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P |
NC |
DQB9 |
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VSS |
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A0 |
VSS |
NC |
DQA1 |
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R |
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VDDQ/ |
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NC |
A2 |
LBO |
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VDD |
A13 |
PE |
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DNU |
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T |
NC |
A10 |
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A11 |
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NC |
A12 |
A18 |
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ZZ |
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U |
VDDQ |
TMS |
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TDI |
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TCK |
TDO |
NC |
VDDQ |
3/5
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
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Revision: 5/17/02 |
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GS88219/37AB |
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Datasheet Errata |
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GS88219/37A BGA Pin Description |
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Pin Location |
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Symbol |
Type |
Description |
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P4, N4 |
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A0, A1 |
I |
Address field LSBs and Address Counter Preset Inputs |
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A2, A3, A5, A6, B3, B5, C2, C3, C5, |
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An |
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Address Inputs |
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C6, R2, R6, T3, T5 |
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T4 |
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An |
I |
Address Input (x36 Versions) |
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T2, T6 |
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NC |
— |
No Connect (x36 Versions) |
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T2, T6 |
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An |
I |
Address Input (x18 Version) |
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K7, L7, N7, P7, K6, L6, M6, N6, P6 |
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DQA1–DQA9 |
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H7, G7, E7, D7, H6, G6, F6, E6, D6 |
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DQB1–DQB9 |
I/O |
Data Input and Output pins (x36 Versions) |
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H1, G1, E1, D1, H2, G2, F2, E2, D2 |
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DQC1–DQC9 |
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K1, L1, N1, P1, K2, L2, M2, N2, P2 |
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DQD1–DQD9 |
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L5, G5, G3, L3 |
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A, |
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B, |
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C, |
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D |
I |
Byte Write Enable for DQA, DQB, DQC, DQD I/Os; active low (x36 Version) |
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B |
B |
B |
B |
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P7, N6, L6, K7, H6, G7, F6, E7, D6 |
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DQA1–DQA9 |
I/O |
Data Input and Output pins (x18 Version) |
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D1, E2, G2, H1, K2, L1, M2, N1, P2 |
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DQB1–DQB9 |
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L5, G3 |
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A, |
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B |
I |
Byte Write Enable for DQA, DQB I/Os; active low (x18 Version) |
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B |
B |
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B1, B2, C1, R1, T1, U6, B7, C7, J3, |
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NC |
— |
No Connect |
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J5 |
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P6, N7, M6, L7, K6, H7, G6, E6, D7, |
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D2, E1, F2, G1, H2, K1, L2, N2, P1, |
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NC |
— |
No Connect (x18 Version) |
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G5, L3, T4 |
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K4 |
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CK |
I |
Clock Input Signal; active high |
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M4 |
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I |
Byte Write—Writes all enabled bytes; active low |
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BW |
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H4 |
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I |
Global Write Enable—Writes all bytes; active low |
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GW |
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E4 |
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1 |
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I |
Chip Enable; active low |
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E |
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F4 |
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I |
Output Enable; active low |
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G |
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G4 |
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I |
Burst address counter advance enable; active low |
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ADV |
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A4, B4 |
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I |
Address Strobe (Processor, Cache Controller); active low |
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ADSP, |
ADSC |
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T7 |
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ZZ |
I |
Sleep Mode control; active high |
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R3 |
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I |
Linear Burst Order mode; active low |
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LBO |
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L4 |
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SCD |
I |
Single Cycle Deselect/Dual Cycle Deselect Mode Control |
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R7 |
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I |
Parity Bit Enable; active low (High = x16/32 Mode, Low = x18/36 Mode) |
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PE |
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D4 |
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ZQ |
I |
FLXDrive Output Impedance Control |
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(Low = Low Impedance [High Drive], High = High Impedance [Low Drive]) |
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U2 |
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TMS |
I |
Scan Test Mode Select |
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4/5
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Revision: 5/17/02
GS88219/37AB
Datasheet Errata
GS88219/37A BGA Pin Description
Pin Location |
Symbol |
Type |
Description |
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U3 |
TDI |
I |
Scan Test Data In |
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U5 |
TDO |
O |
Scan Test Data Out |
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U4 |
TCK |
I |
Scan Test Clock |
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J2, C4, J4, R4, J6 |
VDD |
I |
Core power supply |
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D3, E3, F3, H3, K3, M3, N3, P3, D5, |
VSS |
I |
I/O and Core Ground |
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E5, F5, H5, K5, M5, N5, P5 |
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A1, F1, J1, M1, U1, A7, F7, J7, M7, |
VDDQ |
I |
Output driver power supply |
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U7 |
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R5 |
VDDQ/DNU |
— |
VDDQ or VDD (must be tied high) |
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or |
||||
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Do Not Use (must be left floating) |
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5/5
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Preliminary
GS88219/37AB-250/225/200/166/150/133
119-Bump BGA
Commercial Temp
Industrial Temp
512K x 18, 256K x 36
9Mb SCD/DCD Sync Burst SRAMs
250 MHz–133MHz
2.5V or 3.3 V VDD
2.5V or 3.3 V I/O
Features
•Single/Dual Cycle Deselect selectable
•IEEE 1149.1 JTAG-compatible Boundary Scan
•ZQ mode pin for user-selectable high/low output drive
•2.5 V or 3.3 V +10%/–10% core power supply
•2.5 V or 3.3 V I/O supply
•LBO pin for Linear or Interleaved Burst mode
•Internal input resistors on mode pins allow floating mode pins
•Default to SCD x18/x36 Interleaved Pipeline mode
•Byte Write (BW) and/or Global Write (GW) operation
•Internal self-timed write cycle
•Automatic power-down for portable applications
•JEDEC-standard 119-bump BGA package
|
|
-250 |
-225 |
-200 |
-166 -150 -133 Unit |
||||
Pipeline |
tKQ |
2.0 |
2.2 |
2.5 |
2.9 |
3.3 |
3.5 |
ns |
|
3-1-1-1 |
tCycle |
4.0 |
4.4 |
5.0 |
6.0 |
6.7 |
7.5 |
ns |
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3.3 V |
Curr (x18) |
280 |
255 |
230 |
200 |
185 |
165 |
mA |
|
Curr (x36) |
330 |
300 |
270 |
230 |
215 |
190 |
mA |
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2.5 V |
Curr (x18) |
275 |
250 |
230 |
195 |
180 |
165 |
mA |
|
Curr (x36) |
320 |
295 |
265 |
225 |
210 |
185 |
mA |
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Functional Description
Applications
The GS88219/37AB is a 9,437,184-bit high performance synchronous SRAM with a 2-bit burst address counter. Although of a type originally developed for Level 2 Cache applications supporting high performance CPUs, the device now finds application in synchronous SRAM applications, ranging from DSP main store to networking chip set support.
captured in the input registers. DCD RAMs hold the deselect command for one full cycle and then begin turning off their outputs just after the second rising edge of clock. The user may configure this SRAM for either mode of operation using the SCD mode input.
Byte Write and Global Write
Byte write operation is performed by using Byte Write enable (BW) input combined with one or more individual byte write signals (Bx). In addition, Global Write (GW) is available for writing all bytes at one time, regardless of the Byte Write control inputs.
FLXDrive™
The ZQ pin allows selection between high drive strength (ZQ low) for multi-drop bus applications and normal drive strength (ZQ floating or high) point-to-point applications. See the Output Driver Characteristics chart for details.
Sleep Mode
Low power (Sleep mode) is attained through the assertion (High) of the ZZ signal, or by stopping the clock (CK). Memory data is retained during Sleep mode.
Core and Interface Voltages
The GS88219/37AB operates on a 2.5 V or 3.3 V power supply. All input are 3.3 V and 2.5 V compatible. Separate output power (VDDQ) pins are used to decouple output noise from the internal circuits and are 3.3 V and 2.5 V compatible.
Controls
Addresses, data I/Os, chip enable (E1), address burst control inputs (ADSP, ADSC, ADV), and write control inputs (Bx, BW, GW) are synchronous and are controlled by a positive-edge- triggered clock input (CK). Output enable (G) and power down control (ZZ) are asynchronous inputs. Burst cycles can be initiated with either ADSP or ADSC inputs. In Burst mode, subsequent burst addresses are generated internally and are controlled by ADV. The burst address counter may be configured to count in either linear or interleave order with the Linear Burst Order (LBO) input. The Burst function need not be used. New addresses can be loaded on every cycle with no degradation of chip performance.
SCD and DCD Pipelined Reads
The GS88219/37AB is a SCD (Single Cycle Deselect) and DCD (Dual Cycle Deselect) pipelined synchronous SRAM. DCD SRAMs pipeline disable commands to the same degree as read commands. SCD SRAMs pipeline deselect commands one stage less than read commands. SCD RAMs begin turning off their outputs immediately after the deselect command has been
Rev: 1.00 3/2002 |
1/36 |
© 2002, Giga Semiconductor, Inc. |
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Preliminary
GS88219/37AB-250/225/200/166/150/133
GS88237A Pad Out
119 Bump BGA—Top View
|
1 |
2 |
3 |
4 |
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5 |
6 |
7 |
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A |
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VDDQ |
A6 |
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A7 |
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ADSP |
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A8 |
A9 |
VDDQ |
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B |
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NC |
NC |
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A4 |
ADSC |
A15 |
A17 |
NC |
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C |
NC |
A5 |
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A3 |
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VDD |
A14 |
A16 |
NC |
||||||||||||||
D |
DQC4 |
DQC9 |
VSS |
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ZQ |
VSS |
DQB9 |
DQB4 |
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E |
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DQC3 |
DQC8 |
VSS |
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E1 |
VSS |
DQB8 |
DQB3 |
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F |
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VDDQ |
DQC7 |
VSS |
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G |
VSS |
DQB7 |
VDDQ |
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G |
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DQC2 |
DQC6 |
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BC |
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ADV |
BB |
DQB6 |
DQB2 |
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H |
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DQC1 |
DQC5 |
VSS |
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GW |
VSS |
DQB5 |
DQB1 |
|||||||||||||||
J |
VDDQ |
VDD |
NC |
|
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VDD |
NC |
VDD |
VDDQ |
|||||||||||||||
K |
DQD1 |
DQD5 |
VSS |
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CK |
VSS |
DQA5 |
DQA1 |
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L |
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DQD2 |
DQD6 |
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BD |
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SCD |
BA |
DQA6 |
DQA2 |
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M |
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VDDQ |
DQD7 |
VSS |
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BW |
VSS |
DQA7 |
VDDQ |
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N |
DQD3 |
DQD8 |
VSS |
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A1 |
VSS |
DQA8 |
DQA3 |
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P |
DQD4 |
DQD9 |
VSS |
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A0 |
VSS |
DQA9 |
DQA4 |
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R |
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NC |
A2 |
LBO |
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VDD |
NC |
A13 |
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PE |
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T |
NC |
NC |
A10 |
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A11 |
A12 |
NC |
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ZZ |
|||||||||||||
U |
VDDQ |
TMS |
TDI |
|
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TCK |
TDO |
NC |
VDDQ |
Rev: 1.00 3/2002 |
2/36 |
© 2002, Giga Semiconductor, Inc. |
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Preliminary
GS88219/37AB-250/225/200/166/150/133
GS88219A Pad Out
119 Bump BGA—Top View
|
1 |
2 |
3 |
4 |
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5 |
6 |
7 |
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A |
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VDDQ |
A6 |
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A7 |
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ADSP |
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A8 |
A9 |
VDDQ |
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B |
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NC |
NC |
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A4 |
ADSC |
A15 |
A17 |
NC |
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C |
NC |
A5 |
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A3 |
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VDD |
A14 |
A16 |
NC |
||||||||||||||
D |
DQB1 |
NC |
VSS |
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ZQ |
VSS |
DQA9 |
NC |
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E |
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NC |
DQB2 |
VSS |
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E1 |
VSS |
NC |
DQA8 |
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F |
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VDDQ |
NC |
VSS |
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G |
VSS |
DQA7 |
VDDQ |
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G |
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NC |
DQB3 |
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BB |
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ADV |
NC |
NC |
DQA6 |
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H |
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DQB4 |
NC |
VSS |
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GW |
VSS |
DQA5 |
NC |
|||||||||||||||
J |
VDDQ |
VDD |
NC |
|
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VDD |
NC |
VDD |
VDDQ |
|||||||||||||||
K |
NC |
DQB5 |
VSS |
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CK |
VSS |
NC |
DQA4 |
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L |
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DQB6 |
NC |
NC |
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SCD |
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BA |
DQA3 |
NC |
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M |
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VDDQ |
DQB7 |
VSS |
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BW |
VSS |
NC |
VDDQ |
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N |
DQB8 |
NC |
VSS |
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A1 |
VSS |
DQA2 |
NC |
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P |
NC |
DQB9 |
VSS |
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A0 |
VSS |
NC |
DQA1 |
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R |
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NC |
A2 |
LBO |
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VDD |
NC |
A13 |
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PE |
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T |
NC |
A10 |
A11 |
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NC |
A12 |
A18 |
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ZZ |
|||||||||||||
U |
VDDQ |
TMS |
TDI |
|
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TCK |
TDO |
NC |
VDDQ |
BPR1999.05.18
Rev: 1.00 3/2002 |
3/36 |
© 2002, Giga Semiconductor, Inc. |
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
|
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|
|
Preliminary |
|
|
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|
|
GS88219/37AB-250/225/200/166/150/133 |
|
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GS88219/37A BGA Pin Description |
|
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||||||
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||||
|
Pin Location |
|
Symbol |
Type |
Description |
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||||
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P4, N4 |
|
A0, A1 |
I |
Address field LSBs and Address Counter Preset Inputs |
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||
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A2, A3, A5, A6, B3, B5, C2, C3, C5, |
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An |
I |
Address Inputs |
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|||
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C6, R2, R6, T3, T5 |
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T4 |
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An |
I |
Address Input (x36 Versions) |
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T2, T6 |
|
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NC |
— |
No Connect (x36 Versions) |
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T2, T6 |
|
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An |
I |
Address Input (x18 Version) |
|
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||||
|
K7, L7, N7, P7, K6, L6, M6, N6, P6 |
|
DQA1–DQA9 |
|
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||||
|
H7, G7, E7, D7, H6, G6, F6, E6, D6 |
|
DQB1–DQB9 |
I/O |
Data Input and Output pins (x36 Versions) |
|
||||
|
H1, G1, E1, D1, H2, G2, F2, E2, D2 |
|
DQC1–DQC9 |
|
||||||
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||||||
|
K1, L1, N1, P1, K2, L2, M2, N2, P2 |
|
DQD1–DQD9 |
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||||
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||
|
L5, G5, G3, L3 |
BA, BB, BC, BD |
I |
Byte Write Enable for DQA, DQB, DQC, DQD I/Os; active low (x36 Version) |
|
|||||
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||||
|
P7, N6, L6, K7, H6, G7, F6, E7, D6 |
|
DQA1–DQA9 |
I/O |
Data Input and Output pins (x18 Version) |
|
||||
|
D1, E2, G2, H1, K2, L1, M2, N1, P2 |
|
DQB1–DQB9 |
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L5, G3 |
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BA, BB |
I |
Byte Write Enable for DQA, DQB I/Os; active low (x18 Version) |
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||
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||
|
B1, B2, C1, R1, T1, U6, B7, C7, J3, |
|
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NC |
— |
No Connect |
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|||
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J5, R5 |
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P6, N7, M6, L7, K6, H7, G6, E6, D7, |
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||
|
D2, E1, F2, G1, H2, K1, L2, N2, P1, |
|
|
NC |
— |
No Connect (x18 Version) |
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|||
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|
G5, L3, T4 |
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K4 |
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CK |
I |
Clock Input Signal; active high |
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M4 |
|
BW |
I |
Byte Write—Writes all enabled bytes; active low |
|
||
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H4 |
|
GW |
I |
Global Write Enable—Writes all bytes; active low |
|
||
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E4 |
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E1 |
I |
Chip Enable; active low |
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F4 |
|
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G |
I |
Output Enable; active low |
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G4 |
|
ADV |
I |
Burst address counter advance enable; active low |
|
||
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A4, B4 |
ADSP, ADSC |
I |
Address Strobe (Processor, Cache Controller); active low |
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|||
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T7 |
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ZZ |
I |
Sleep Mode control; active high |
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R3 |
|
LBO |
I |
Linear Burst Order mode; active low |
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||
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||
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|
L4 |
|
SCD |
I |
Single Cycle Deselect/Dual Cycle Deselect Mode Control |
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R7 |
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I |
Parity Bit Enable; active low (High = x16/32 Mode, Low = x18/36 Mode) |
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PE |
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||||
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D4 |
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ZQ |
I |
FLXDrive Output Impedance Control |
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(Low = Low Impedance [High Drive], High = High Impedance [Low Drive]) |
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||||
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|
Rev: 1.00 3/2002 |
4/36 |
© 2002, Giga Semiconductor, Inc. |
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
|
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|
Preliminary |
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|
GS88219/37AB-250/225/200/166/150/133 |
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|
GS88219/37A BGA Pin Description |
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|
Pin Location |
Symbol |
Type |
Description |
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U2 |
TMS |
I |
Scan Test Mode Select |
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U3 |
TDI |
I |
Scan Test Data In |
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U5 |
TDO |
O |
Scan Test Data Out |
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U4 |
TCK |
I |
Scan Test Clock |
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||
|
J2, C4, J4, R4, J6 |
VDD |
I |
Core power supply |
|
||
|
D3, E3, F3, H3, K3, M3, N3, P3, D5, |
VSS |
I |
I/O and Core Ground |
|
||
|
E5, F5, H5, K5, M5, N5, P5 |
|
|||||
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||
|
A1, F1, J1, M1, U1, A7, F7, J7, M7, |
VDDQ |
I |
Output driver power supply |
|
||
|
|
|
U7 |
|
|||
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|
|
Rev: 1.00 3/2002 |
5/36 |
© 2002, Giga Semiconductor, Inc. |
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Preliminary
GS88219/37AB-250/225/200/166/150/133
GS88219/37A (PE = 0) Block Diagram
|
Register |
|
|
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|
|
|
A0–An |
D |
Q |
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A0 |
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A0 |
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D0 |
|
Q0 |
A1 |
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A1 |
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D1 |
|
Q1 |
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|
Counter |
|
|
A |
|
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|
Load |
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|
LBO |
|
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|
Memory |
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ADV |
|
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CK |
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Array |
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|
ADSC |
|
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|
ADSP |
|
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|
Q |
D |
|
|
GW |
|
Register |
|
|
36 |
36 |
|
|
|
BW |
|
D |
Q |
|
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||
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BA |
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Register |
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D |
Q |
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BB |
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4 |
|
4 |
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Register |
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D |
Q |
|
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BC |
|
|
|
|
|
Register Q D |
Register D Q |
|
D Q |
|
|
Register |
|
|
Register |
||||
|
|
D |
Q |
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||||
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||
BD |
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Register |
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36 |
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D |
Q |
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|
36 |
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36 |
E1 |
|
Register |
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D |
Q |
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36 |
|
4 |
32 |
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Register |
|
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|
Parity |
||
|
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|
Encode |
|||
|
|
D |
Q |
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||
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|
4 |
||
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Parity |
|
1 |
|
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Compare |
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G |
|
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|
36 |
|
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ZZ |
|
Power Down |
|
|
SCD |
DQx1–DQx9 |
|
NC |
NC |
|
|
|
|
|
|||||
|
Control |
|
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|
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|
|
|
Note: Only x36 version shown for simplicity.
Rev: 1.00 3/2002 |
6/36 |
© 2002, Giga Semiconductor, Inc. |
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS88219/37A (PE = 1) x32 Mode Block Diagram
|
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Register |
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||||||
A0–An |
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D Q |
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A0 |
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||||||||||
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A0 |
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|||||||||||||
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||||||
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D0 |
|
Q0 |
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|||||
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A1 |
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||||||||||
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A1 |
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D1 |
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Q1 |
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|||||||
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Counter |
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|||||
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Load |
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|||
LBO |
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||||
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|||||
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ADV |
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||||
CK |
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||||
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|||||
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ADSC |
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||||
ADSP |
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||||
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Register |
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|||
GW |
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||||||
BW |
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D |
Q |
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||||
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|||||||||||||
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|||||
BA |
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Register |
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D |
Q |
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BB |
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Register |
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D |
Q |
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BC |
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D |
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BD |
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E1 |
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Register |
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1 |
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G |
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SCD |
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ZZ |
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Power Down |
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Control |
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||||||||
Note: Only x36 version shown for simplicity. |
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Rev: 1.00 3/2002 |
7/36 |
Preliminary
GS88219/37AB-250/225/200/166/150/133
A
Memory
|
Array |
Q |
D |
|
|
36 |
36 |
|
4 |
Parity
Encode
32 |
4
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Register Q D |
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Register D Q |
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36 |
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32 |
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Register |
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36 |
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D |
Q |
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32 |
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4 |
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32 |
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Register |
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D |
Q |
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Parity |
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Encode |
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4 |
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Parity |
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Compare |
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32 |
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DQx1–DQx9 |
|
|
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|
|
NC |
|
|
NC |
© 2002, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
|
|
|
|
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|
|
|
Preliminary |
|
|
|
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|
|
|
GS88219/37AB-250/225/200/166/150/133 |
|
|
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||
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Mode Pin Functions |
|
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||
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|
Mode Name |
|
Pin |
State |
Function |
|
|||
|
Name |
|
|||||||
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|||
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|
L |
Linear Burst |
|
|
Burst Order Control |
LBO |
|||||||
|
|
|
|
||||||
|
H |
Interleaved Burst |
|
||||||
|
|
|
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||
|
|
|
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|
|
|
Power Down Control |
|
ZZ |
L or NC |
Active |
|
|||
|
|
|
|
|
|||||
|
|
H |
Standby, IDD = ISB |
|
|||||
|
|
|
|
|
|
|
|
||
|
Single/Dual Cycle Deselect Control |
SCD |
L |
Dual Cycle Deselect |
|
||||
|
|
|
|
||||||
|
H or NC |
Single Cycle Deselect |
|
||||||
|
|
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|
||
|
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|
|
FLXDrive Output Impedance Control |
|
ZQ |
L |
High Drive (Low Impedance) |
|
|||
|
|
|
|
|
|||||
|
|
H or NC |
Low Drive (High Impedance) |
|
|||||
|
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|
||
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|
|
Note:
Thereis a pull-down device on the ZZ pin, so this input pin can be unconnected and the chip will operate in the default states as specified in the above tables.
Enable / Disable Parity I/O Pins
This SRAM allows the user to configure the device to operate in Parity I/O active (x18, x36, or x72) or in Parity I/O inactive (x16, x32, or x64) mode. Holding the PE bump low or letting it float will activate the 9th I/O on each byte of the RAM. Grounding PE deactivates the 9th I/O of each byte.
Burst Counter Sequences
Linear Burst Sequence
|
A[1:0] |
A[1:0] |
A[1:0] |
A[1:0] |
|
|
|
|
|
|
|
|
|
|
1st address |
00 |
01 |
10 |
11 |
|
|
|
|
|
2nd address |
01 |
10 |
11 |
00 |
|
|
|
|
|
3rd address |
10 |
11 |
00 |
01 |
|
|
|
|
|
4th address |
11 |
00 |
01 |
10 |
|
|
|
|
|
Note: The burst counter wraps to initial state on the 5th clock.
Interleaved Burst Sequence
|
A[1:0] |
A[1:0] |
A[1:0] |
A[1:0] |
|
|
|
|
|
|
|
|
|
|
1st address |
00 |
01 |
10 |
11 |
|
|
|
|
|
2nd address |
01 |
00 |
11 |
10 |
|
|
|
|
|
3rd address |
10 |
11 |
00 |
01 |
|
|
|
|
|
4th address |
11 |
10 |
01 |
00 |
|
|
|
|
|
Note: The burst counter wraps to initial state on the 5th clock.
BPR 1999.05.18
Rev: 1.00 3/2002 |
8/36 |
© 2002, Giga Semiconductor, Inc. |
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.