M28W640ECB90N6 STMicroelectronics, M28W640ECB90N6 Datasheet - Page 18

• Manufacturer Part Number: M28W640ECB90N6
• Description: IC FLASH 64MBIT 90NS 48TSOP
• Manufacturer: STMicroelectronics

Specifications of M28W640ECB90N6

• Format - Memory: FLASH
• Memory Type: FLASH - Nor
• Memory Size: 64M (4M x 16)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-TSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-1698

M28W640ECT, M28W640ECB
Table 10. Protection Status
Note: 1. The lock status is defined by the write protect pin and by DQ1 (‘1’ for a locked-down block) and DQ0 (‘1’ for a locked block) as read
18/55
Current State
2. All blocks are locked at power-up, so the default configuration is 001 or 101 according to WP status.
3. A WP transition to V
1,0,1
0,0,1
1,0,0
1,1,0
1,1,1
0,0,0
0,1,1
in the Read Electronic Signature command with A1 = V
Protection Status
(2)
(2)
(WP, DQ1, DQ0)
Current
Program/Erase
Allowed
IH
on a locked block will restore the previous DQ0 value, giving a 111 or 110.
(1)
yes
yes
yes
no
no
no
no
Block Lock
Command
After
1,0,1
1,0,1
1,1,1
1,1,1
0,0,1
0,0,1
0,1,1
IH
and A0 = V
Block Unlock
Command
Next Protection Status
After
1,0,0
1,0,0
1,1,0
1,1,0
0,0,0
0,0,0
0,1,1
IL
.
(WP, DQ1, DQ0)
After Block
Lock-Down
Command
1,1,1
1,1,1
1,1,1
1,1,1
0,1,1
0,1,1
0,1,1
(1)
1,1,1 or 1,1,0
WP transition
After
0,0,0
0,0,1
0,1,1
0,1,1
1,0,0
1,0,1
(3)