PSD4235G2-90UI STMicroelectronics, PSD4235G2-90UI Datasheet - Page 46

• Manufacturer Part Number: PSD4235G2-90UI
• Description: IC FLASH 4MBIT 90NS 80TQFP
• Manufacturer: STMicroelectronics

Specifications of PSD4235G2-90UI

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 4M (512K x 8)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-1969

Programming Flash memory
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Figure 6.
Data toggle flowchart
No
at Valid Even Address
READ DQ5 and DQ6
(DQ13 and DQ14)
Issue RESET
READ DQ6
Cycle failed
instruction
Program
or Erase
START
(DQ14)
(DQ13)
(DQ14)
Toggle
(DQ14)
Toggle
DQ6
DQ5
DQ6
= 1
=
=
Yes
Yes
Yes
No
No
complete
Program
or Erase
Cycle is
AI04921
PSD4235G2