參數(shù)資料
型號(hào)： uPSD3233
廠商： 意法半導(dǎo)體
英文描述： Flash Programmable System Device with 8032 Microcontroller Core(嵌入高速“8032微控制器核”的Flash型可編程系統(tǒng)器)
中文描述： 閃存可編程系統(tǒng)器件與8032微控制器內(nèi)核（嵌入高速“8032微控制器核”的閃存型可編程系統(tǒng)器）
文件頁(yè)數(shù)： 96/164頁(yè)
文件大?。?/td> 1133K
代理商： UPSD3233
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μ
PSD3200 FAMILY
96/164
DRAFT(Thursday 20 June 2002, 13:15).
PSD MODULE DETAILED OPERATION
As shown in Figure 14, the PSD Module consists
of five major types of functional blocks:
I
Memory Block
I
PLD Blocks
I
I/O Ports
I
Power Management Unit (PMU)
I
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 Module has the following memory
blocks:
– Primary Flash memory
– Secondary Flash memory
– SRAM
The Memory Select signals for these blocks origi-
nate from the Decode PLD (DPLD) and are user-
defined in PSDsoft Express.
Primary Flash Memory and Secondary Flash
memory Description
The primary Flash memory is divided evenly into
eight equal sectors. The secondary Flash memory
is divided into four equal sectors. Each sector of
either memory block can be separately protected
from Program and Erase cycles.
Flash memory may be erased on a sector-by-sec-
tor basis. Flash sectorerasure may be suspended
while data is read from other sectors of the block
and then resumed after reading.
During a Program orErase cycle inFlash memory,
the status can be output on Ready/Busy (PC3).
This pin is set upusing PSDsoft Express Configu-
ration.
Memory Block Select Signals
The DPLD generates the Select signals for all the
internal memory blocks (see the section entitled
“PLDs”, onpage 108). Each of the eight sectors of
the primary Flash memory has a Select signal
(FS0-FS7) which can contain up to three product
terms. Each of the four sectors of the secondary
Flash memory has a Select signal (CSBOOT0-
CSBOOT3) which can contain up to three product
terms. Having three product terms for each Select
signal allows a given sector to be mapped in Pro-
gram or Data space.
Ready/Busy (PC3).
This signal can be used to
output the Ready/Busy status of the Flash memo-
ry. The output on Ready/Busy (PC3) is a 0 (Busy)
when Flash memory is being written to, or when
Flash memory is being erased. The output is a 1
(Ready) when no Write or Erase cycle is in
progress.
Memory Operation.
The primary Flash memory
and secondary Flash memory are addressed
through the MCU Bus.TheMCU can access these
memories in one of two ways:
I
The MCU can execute a typical bus Write or
Read operation
I
The MCU can execute a specific Flash memory
instruction that consists of several Write and
Read operations. This involves writing specific
data patterns to special addresses within the
Flash memory to invoke an embedded
algorithm. These instructions are summarized
in Table 83.
Typically, the MCU can read Flash memory using
Read operations, just as it would read a ROM de-
vice. However, Flash memory can only be altered
using specific Erase and Programinstructions. For
example, the MCU cannot write a single byte di-
rectly to Flash memory as it would write a byte to
RAM. To program a byte into Flash memory, the
MCU must execute a Program instruction, then
test the status of the Program cycle. This status
test is achieved by a Read operation or polling
Ready/Busy (PC3).
Flash memory can also be read by using special
instructions to retrieve particular Flash device in-
formation (sector protect status and ID).
相關(guān)PDF資料
PDF描述
uPSD3234(中文) Flash Programmable System Device with 8032 Microcontroller Core(嵌入高速“8032微控制器核”的Flash型可編程系統(tǒng)器)
uPSD3212C(中文) Flash Programmable System Devices with 8032 Microcontroller Core and 16Kbit SRAM(帶8032微控制器內(nèi)核和16Kbit SRAM的FLASH可編程系統(tǒng)器件)
uPSD3254A(中文) Flash Programmable System Devices with 8032 Microcontroller Core(帶8032微控制器內(nèi)核的FLASH可編程系統(tǒng)器件)
uPSD3254BV(中文) Flash Programmable System Devices with 8032 Microcontroller Core(帶8032微控制器內(nèi)核的FLASH可編程系統(tǒng)器件)
UPSD3234A Flash Programmable System Devices with 8032 Microcontroller Core
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPSD3233A-24T1 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core
UPSD3233A-24T1T 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core
UPSD3233A-24T6 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core
UPSD3233A-24T6T 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash Programmable System Devices with 8032 Microcontroller Core
UPSD3233A-24U1 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash Programmable System Device with 8032 Microcontroller Core
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