MR25H256CDCR EverSpin Technologies Inc, MR25H256CDCR Datasheet - Page 9

• Manufacturer Part Number: MR25H256CDCR
• Description: IC MRAM 256KBIT 40MHZ 8DFN
• Manufacturer: EverSpin Technologies Inc
• Series: -r

Specifications of MR25H256CDCR

• Format - Memory: RAM
• Memory Type: MRAM (Magnetoresistive RAM)
• Memory Size: 256K (32K x 8)
• Speed: 40MHz
• Interface: SPI Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Word Size: 8b
• Organization: 32Kx8
• Density: 256Kb
• Interface Type: Serial (SPI)
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 2.7V
• Operating Temp Range: -40C to 85C
• Pin Count: 8
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Enter Sleep Mode (SLEEP)
The Enter Sleep Mode (SLEEP) command turns off all MRAM power regulators in order to reduce the overall
chip standby power to 3 μA typical. The SLEEP command is entered by driving CS low, sending the com-
mand code, and then driving CS high. The standby current is achieved after time, t
Exit Sleep Mode (WAKE)
The Exit Sleep Mode (WAKE) command turns on internal MRAM power regulators to allow normal operation.
The WAKE command is entered by driving CS low, sending the command code, and then driving CS high.
The memory returns to standby mode after t
Everspin Technologies © 2010
SPI COMMUNICATIONS PROTOCOL
SCK
SCK
CS
CS
SO
SO
SI
SI
1
1
0
0
0
0
1
1
1
1
2
2
Active Current
Instruction (B9h)
Instruction (ABh)
1
0
3
3
Sleep Mode Current
1
1
4
4
RDP
Figure 2.7 SLEEP
Figure 2.8 WAKE
. The CS pin must remain high until the t
0
0
5
5
0
1
9
6
6
1
1
7
7
Document Number: MR25H256 Rev. 2, 4/2010
Standby Current
t
t
RDP
DP
DP
.
MR25H256
RDP
Sleep Mode Current
period is over.
Standby Current
Mode 3
Mode 0
Mode 3
Mode 0