psd4235g2 STMicroelectronics, psd4235g2 Datasheet - Page 35
psd4235g2
Manufacturer Part Number
psd4235g2
Description
Flash In-system Programmable Isp Peripherals For 16-bit Mcus 5v Supply
Manufacturer
STMicroelectronics
Datasheet
1.PSD4235G2.pdf
(129 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
psd4235g2-70U
Manufacturer:
ST
Quantity:
210
Company:
Part Number:
psd4235g2-70U
Manufacturer:
STMicroelectronics
Quantity:
10 000
Company:
Part Number:
psd4235g2-90U
Manufacturer:
MURATA
Quantity:
34 000
Part Number:
psd4235g2-90U
Manufacturer:
ST
Quantity:
20 000
Company:
Part Number:
psd4235g2-90UI
Manufacturer:
TI
Quantity:
8 802
Company:
Part Number:
psd4235g2V-90U
Manufacturer:
SHARP
Quantity:
201
PSD4235G2
7
7.1
Detailed operation
As shown in
●
●
●
●
●
●
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:
●
●
●
The Memory Select signals for these blocks originate from the Decode PLD (DPLD) and are
user-defined in PSDsoft Express.
Table 28
Table 28.
number
Sector
Total
0
1
2
3
4
5
6
7
Memory blocks
PLD blocks
MCU bus Interface
I/O ports
Power management unit (PMU)
JTAG-ISP interface
Primary Flash memory
Secondary Flash memory
SRAM
summarizes the sizes and organisations of the memory blocks.
Sector size
512 Kbytes
Primary Flash Memory
Figure
Memory block size and organization
Kbytes)
(x16,
32
32
32
32
32
32
32
32
3, the PSD consists of six major types of functional blocks:
8 sectors
Sector
Select
signal
FS0
FS1
FS2
FS3
FS4
FS5
FS6
FS7
Secondary Flash Memory
Sector size
32 Kbytes
Kbytes)
(x16,
4
4
4
4
CSBOOT0
CSBOOT1
CSBOOT2
CSBOOT3
4 sectors
Sector
Select
signal
SRAM size
8 Kbytes
Kbytes)
(x16,
4
Detailed operation
SRAM
SRAM
Select
signal
RS0
35/129