PSD4235G2-90U STMicroelectronics, PSD4235G2-90U Datasheet - Page 59

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

Specifications of PSD4235G2-90U

• 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: 497-1968

PSD4235G2
17
Decode PLD (DPLD)
The DPLD, shown in
components. The DPLD can be used to generate the following decode signals:
●
●
●
●
●
●
8 Sector Select (FS0-FS7) signals for the primary Flash memory (three product terms
each)
4 Sector Select (CSBOOT0-CSBOOT3) signals for the secondary Flash memory (three
product terms each)
1 internal SRAM Select (RS0) signal (three product terms)
1 internal CSIOP Select (PSD Configuration register) signal
1 JTAG Select signal (enables JTAG-ISP on Port E)
2 internal Peripheral Select signals
(Peripheral I/O mode).
Figure
12, is used for decoding the address for internal and external
Decode PLD (DPLD)
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