PSD4235G2-90U STMicroelectronics, PSD4235G2-90U Datasheet - Page 67

• 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
18.7
Figure 16. External Chip Select signal
External Chip Select
The CPLD also provides eight External Chip Select (ECS0-ECS7) outputs that can be used
to select external devices. Each External Chip Select (ECS0-ECS7) consists of one product
term that can be configured active high or low.
The output enable of the pin is controlled by either the output enable product term or the
Direction register. (See
ECS PT
POLARITY
BIT
Figure
ENABLE (.OE) PT
16.)
To Port C or F
ECS
Port C or Port F
DIRECTION
REGISTER
Complex PLD (CPLD)
PORT PIN
AI04927
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