PSD834F2-90M STMicroelectronics, PSD834F2-90M Datasheet - Page 19

• Manufacturer Part Number: PSD834F2-90M
• Description: IC FLASH 2MBIT 90NS 52QFP
• Manufacturer: STMicroelectronics

Specifications of PSD834F2-90M

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 2M (256K x 8)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 52-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2008

DETAILED OPERATION
As shown in
of six major types of functional blocks:
■
■
■
■
■
■
The functions of each block are described in the
following sections. Many of the blocks perform
multiple functions, and are user configurable.
Table 8. Memory Block Size and Organization
Number
Memory Blocks
PLD Blocks
MCU Bus Interface
I/O Ports
Power Management Unit (PMU)
JTAG Interface
Sector
Total
0
1
2
3
4
5
6
7
Figure 5., page
Sector Size
(Bytes)
Primary Flash Memory
512K
32K
32K
32K
32K
32K
32K
32K
32K
14, the PSD consists
Sector Select
8 Sectors
Signal
FS0
FS1
FS2
FS3
FS4
FS5
FS6
FS7
Doc ID 10552 Rev 3
Sector Size
Secondary Flash Memory
(Bytes)
16K
16K
16K
16K
64K
Memory Blocks
The PSD has the following memory blocks:
–
–
–
The Memory Select signals for these blocks origi-
nate from the Decode PLD (DPLD) and are user-
defined in PSDsoft Express.
Primary Flash memory
Optional Secondary Flash memory
Optional SRAM
Sector Select
CSBOOT0
CSBOOT1
CSBOOT2
CSBOOT3
4 Sectors
Signal
PSD813F2V, PSD854F2V
SRAM Size
(Bytes)
256K
256K
SRAM
SRAM Select
Signal
RS0
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