W9725G6JB-25 Winbond Electronics, W9725G6JB-25 Datasheet - Page 14

• Manufacturer Part Number: W9725G6JB-25
• Description: IC DDR2-800 SDRAM 256MB 84WBGA
• Manufacturer: Winbond Electronics

Specifications of W9725G6JB-25

• Format - Memory: RAM
• Memory Type: DDR2 SDRAM
• Memory Size: 256M (16Mx16)
• Speed: 2.5ns
• Interface: Parallel
• Voltage - Supply: 1.7 V ~ 1.9 V
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 84-WBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

W9725G6JB
7.2.2.4
Extend Mode Register Set Command (3), EMR (3)
( CS = "L", RAS = "L", CAS = "L", WE = "L", BA0 = "H", BA1 = "H", A0 to A12 = Register data)
No function is defined in extended mode register (3). The default value of the EMR (3) is not defined,
therefore the EMR (3) must be programmed during initialization for proper operation.
B A 1 B A 0 A 1 2 A 1 1 A 1 0
A 9
A 8
A 7
A 6
A 5
A 4
A 3
A 2
A 1
A 0
A d d re s s F ie ld
1
1
E x te n d e d M o d e R e g is te r (3 )
1
0 *
Note:
1. All bits in EMR (3) except BA0 and BA1 are reserved for future use and must be set to 0 when programming the EMR (3).
Figure 5—EMR (3)
Publication Release Date: Mar. 10, 2010
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Revision A01