PSD835G2-90U STMicroelectronics, PSD835G2-90U Datasheet - Page 36

• Manufacturer Part Number: PSD835G2-90U
• Description: IC FLASH 4MBIT 90NS 80TQFP
• Manufacturer: STMicroelectronics

Specifications of PSD835G2-90U

• 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: 0°C ~ 70°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2015

Detailed operation
6. The Reset instruction is required to return to the READ mode after reading the Flash ID, or after reading the Sector
7. The data is 00h for an unprotected sector, and 01h for a protected sector. In the fourth cycle, the Sector Select is active,
8. The MCU cannot invoke these instructions while executing code from the same Flash memory as that for which the
9. Additional sectors to be erased must be written at the end of the Sector Erase instruction within 80 µs.
10. The system may perform READ and Program cycles in non-erasing sectors, read the Flash ID or read the Sector Protection
11. The Resume Sector Erase instruction is valid only during the Suspend Sector Erase mode.
12. The Unlock Bypass instruction is required prior to the Unlock Bypass Program instruction.
13. 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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Protection Status, or if the Error flag bit (DQ5/DQ13) goes high.
and (A1,A0)=(1,0).
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.
Status when in the Suspend Sector Erase mode. The Suspend Sector Erase instruction is valid only during a Sector Erase
cycle.
Bypass mode.
PSD835G2