PSD4235G2-90UI STMicroelectronics, PSD4235G2-90UI Datasheet - Page 91

• 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

PSD4235G2
Figure 29. Port D structure
20.23
Port E - functionality and structure
Port E can be configured to perform one or more of the following functions (see
●
●
●
●
MCU I/O Mode
In-System Programming (ISP) - JTAG port can be enabled for programming/erase of
the PSD device. See
programming.
Open Drain - pins can be configured in Open Drain Mode
Latched Address output - Provide latched address output.
WR
WR
DIR Register
READ MUX
DATA OUT
Register
D
D
P
D
B
Q
Q
Figure 33: Reset (RESET) timing
DATA OUT
DATA IN
CPLD-INPUT
OUTPUT
OUTPUT
SELECT
MUX
for more information on JTAG
PORT D PIN
Figure
I/O ports
AI04937
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