PSD4235G2-90UI STMicroelectronics, PSD4235G2-90UI Datasheet - Page 72

• 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

MCU bus interface
19.4
72/129
MCU bus interface examples
Figure 20
and some popular MCUs. The PSD4235G2 Control input pins are labeled as to the MCU
function for which they are configured. The MCU bus interface is specified using PSDsoft
Express.
Table 36.
Table 37.
Table 38.
WRH
WRH
SIZ0
0
0
1
0
1
1
0
1
0
to
Figure 25
16-bit data bus with WRH and WRL
16-bit data bus with SIZ0, A0 (Motorola MCU)
16-bit data bus with LDS, UDS (Motorola MCU)
WRL
WRL
A0
0
1
0
0
0
1
0
0
1
show examples of the basic connections between the PSD4235G2
Odd Byte
Odd Byte
—
Even Byte
Even Byte
—
Even Byte
Even Byte
—
D15-D8
D15-D8
D15-D8
Even Byte
—
Even Byte
Odd Byte
—
Odd Byte
Odd Byte
—
Odd Byte
D7-D0
D7-D0
D7-D0
PSD4235G2