PSD4235G2-90UI STMicroelectronics, PSD4235G2-90UI Datasheet - Page 38

• 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

Detailed operation
9. The MCU cannot invoke these instructions while executing code from the same Flash memory as that for which the
10. Additional sectors to be erased must be written at the end of the Sector Erase instruction within 80µs.
11. The system may perform READ and Program cycles in non-erasing sectors, read the Flash ID or read the Sector
12. The Resume Sector Erase instruction is valid only during the Suspend Sector Erase mode.
13. The Unlock Bypass instruction is required prior to the Unlock Bypass Program instruction.
14. The Unlock Bypass Reset Flash instruction is required to return to reading memory data when the device is in the Unlock
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instruction is intended. The MCU must fetch, for example, the code from the secondary Flash memory when reading the
Sector Protection Status of the primary Flash memory.
Protection Status when in the Suspend Sector Erase mode. The Suspend Sector Erase instruction is valid only during a
Sector Erase cycle.
Bypass mode.
PSD4235G2