PSD4235G2-90UI STMicroelectronics, PSD4235G2-90UI Datasheet - Page 18

• 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

Pin description
Table 2.
18/129
PD2
PD3
PE0
PE1
PE2
PE3
PE4
PE5
PE6
Pin name
1
2
71
72
73
74
75
76
77
Pin description (for the LQFP package) (continued)
Pin
I/O
CMOS
or
Open
Drain
I/O
CMOS
or
Open
Drain
I/O
CMOS
or
Open
Drain
I/O
CMOS
or
Open
Drain
I/O
CMOS
or
Open
Drain
I/O
CMOS
or
Open
Drain
I/O
CMOS
or
Open
Drain
I/O
CMOS
or
Open
Drain
I/O
CMOS
or
Open
Drain
Type
PD2 pin of Port D. This port pin can be configured to have the following functions:
1. MCU I/O - standard output or input port.
2. Transparent PLD input (can also be PLD input for address A16 and above).
3. PSD Chip Select input (CSI). When low, the MCU can access the PSD memory
and I/O. When high, the PSD memory blocks are disabled to conserve power. The
falling edge of this signal can be used to get the device out of Power-down mode.
PD3 pin of Port D. This port pin can be configured to have the following functions:
1. MCU I/O - standard output or input port.
2. Transparent PLD input (can also be PLD input for address A16 and above).
3. WRH - for 16-bit data bus, WRITE to high byte, active low.
PE0 pin of Port E. This port pin can be configured to have the following functions:
1. MCU I/O - standard output or input port.
2. Latched address output.
3. TMS input for the JTAG Serial Interface.
PE1 pin of Port E. This port pin can be configured to have the following functions:
1. MCU I/O - standard output or input port.
2. Latched address output.
3. TCK input for the JTAG Serial Interface.
PE2 pin of Port E. This port pin can be configured to have the following functions:
1. MCU I/O - standard output or input port.
2. Latched address output.
3. TDI input for the JTAG Serial Interface.
PE3 pin of Port E. This port pin can be configured to have the following functions:
1. MCU I/O - standard output or input port.
2. Latched address output.
3. TDO output for the JTAG Serial Interface.
PE4 pin of Port E. This port pin can be configured to have the following functions:
1. MCU I/O - standard output or input port.
2. Latched address output.
3. TSTAT output for the JTAG Serial Interface.
4. Ready/Busy output for parallel in-system programming (ISP).
PE5 pin of Port E. This port pin can be configured to have the following functions:
1. MCU I/O - standard output or input port.
2. Latched address output.
3. TERR active low output for the JTAG Serial Interface.
PE6 pin of Port E. This port pin can be configured to have the following functions:
1. MCU I/O - standard output or input port.
2. Latched address output.
Description
PSD4235G2