PSD954F5V90UT 查看數據表（PDF） - STMicroelectronics

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PSD954F5V90UT

Flash In-System Programmable (ISP) Peripherals for 8-bit MCUs, 5V

STMicroelectronics 

PSD813F2, PSD833F2, PSD834F2, PSD853F2, PSD854F2

DETAILED OPERATION

As shown in Figure 5., page 14, the PSD consists

of six major types of functional blocks:

■ Memory Blocks

■ PLD Blocks

■ MCU Bus Interface

■ I/O Ports

■ Power Management Unit (PMU)

■ JTAG Interface

The functions of each block are described in the

following sections. Many of the blocks perform

multiple functions, and are user configurable.

Memory Blocks

The PSD has the following memory blocks:

– Primary Flash memory

– Optional Secondary Flash memory

– Optional SRAM

The Memory Select signals for these blocks origi-

nate from the Decode PLD (DPLD) and are user-

defined in PSDsoft Express.

Table 8. Memory Block Size and Organization

Primary Flash Memory

Secondary Flash Memory

Sector

Number

Sector Size Sector Select Sector Size Sector Select

(Bytes)

Signal

(Bytes)

Signal

0

32K

FS0

16K

CSBOOT0

1

32K

FS1

16K

CSBOOT1

2

32K

FS2

16K

CSBOOT2

3

32K

FS3

16K

CSBOOT3

4

32K

FS4

5

32K

FS5

6

32K

FS6

7

32K

FS7

Total

512K

8 Sectors

64K

4 Sectors

SRAM

SRAM Size SRAM Select

(Bytes)

Signal

256K

RS0

256K

19/110

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