IS42S16400D-6T-TR ISSI, Integrated Silicon Solution Inc, IS42S16400D-6T-TR Datasheet - Page 17

• Manufacturer Part Number: IS42S16400D-6T-TR
• Description: IC SDRAM 64MBIT 166MHZ 54TSOP
• Manufacturer: ISSI, Integrated Silicon Solution Inc

Specifications of IS42S16400D-6T-TR

• Format - Memory: RAM
• Memory Type: SDRAM
• Memory Size: 64M (4M x 16)
• Speed: 166MHz
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 54-TSOP II
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

IS42S16400D
REGISTER DEFINITION
Mode Register
The mode register is used to define the specific mode of
operation of the SDRAM. This definition includes the
selection of a burst length, a burst type, a CAS latency, an
operating mode and a write burst mode, as shown in MODE
REGISTER DEFINITION.
The mode register is programmed via the LOAD MODE
REGISTER command and will retain the stored information
Integrated Silicon Solution, Inc. — www.issi.com
Rev. E
11/21/07
MODE REGISTER DEFINITION
A11
Reserved
A10
Write Burst Mode
(1)
M9
0
1
A9
Mode
Programmed Burst Length
Single Location Access
Operating Mode
A8
M8 M7
— —
0
0
A7
Defined
M6-M0
—
Latency Mode
A6
M6 M5 M4
0
0
0
0
1
1
1
1
Mode
Standard Operation
All Other States Reserved
0
0
1
1
0
0
1
1
A5
0
1
0
1
0
1
0
1
A4
Burst Type
until it is programmed again or the device loses power.
Mode register bits M0-M2 specify the burst length, M3
specifies the type of burst (sequential or interleaved), M4- M6
specify the CAS latency, M7 and M8 specify the operating
mode, M9 specifies the WRITE burst mode, and M10 and
M11 are reserved for future use.
The mode register must be loaded when all banks are idle,
and the controller must wait the specified time before
initiating the subsequent operation. Violating either of
these requirements will result in unspecified operation.
CAS Latency
M3
0
1
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
A3
2
3
Interleaved
Sequential
1. To ensure compatibility with future devices,
A2
Burst Length
Type
should program M11, M10 = "0, 0"
M2
0
0
0
0
1
1
1
1
A1
M1
0
0
1
1
0
0
1
1
M0
0
1
0
1
0
1
0
1
A0
Reserved
Reserved
Reserved
Address Bus
Mode Register (Mx)
Full Page
M3=0
1
2
4
8
Reserved
Reserved
Reserved
Reserved
M3=1
1
2
4
8
17