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| 型號(hào)： | PSD303 |
| 英文描述： | Field Programmable Microcontroller Peripherals(可編程邏輯,16K位SRAM,19個(gè)可編程I/O,通用PLD有16個(gè)輸入) |
| 中文描述： | 現(xiàn)場(chǎng)可編程微控制器外圍設(shè)備（可編程邏輯，16K的位的SRAM，19余個(gè)可編程輸入/輸出，通用PLD的有16個(gè)輸入） |
| 文件頁(yè)數(shù)： | 2/6頁(yè) |
| 文件大?。?/td> | 60K |
| 代理商： | PSD303 |
PSD3XX – Application Note 026
1-266
Overview
A PSD3XX family device perfectly complements the 80C51SL because it incorporates
additional I/Os with port expansion and EPROM and SRAM memory. As shown in Figure 1,
the PSD311 in particular provides an additional 2K bytes of SRAM in addition to the
256 bytes of SRAM already on-board the 80C51SL. It also integrates 32K bytes of EPROM.
(In many cases, less than 32K bytes of EPROM is actually used.) It also provides the
address decoding, 16 general-purpose I/Os, up to 11 programmable logic outputs and
4 general-purpose logic inputs. The PSD311 interfaces to the battery and power
management units, a real time clock with WatchDog timer, and E
2
potentiometers to
control LCD panel contrast/brightness levels. It monitors the suspend/resume pushbutton
option through its ports, the battery power on/off control, and power sequencing for the
display. The SRAM in the system is used, among other things, to store table information on
the current state of the capacity remaining in the battery.
This second approach seems to be the preferred approach for notebook applications for a
number of reasons. Board space is always so expensive and the board densities so high.
The PSD311/80C51SL chip-set is an attractive cost-effective solution that provides as much
integration as possible to keep the board size to a minimum. It also is configurable and can
be used in many core designs, speeding time-to-market and eliminating the costly need to
design a different ASIC with a standard 80C51 for each application. Finally, it is very low in
power and helps to keep power consumption down. PSD3XX devices are available in
44-pin CLDCC/PLDCC as well as 52-pin PQFP packages and will soon be available in
lower height PCMCIA TQFP packages as well. The PSD3XX devices are also available
at 3.3 V and can be used with the 80C51SL when it becomes available at lower power
supply voltages.
Attached, you will find an example PSD311 configuration file (PSDsoft Fitter Output Report)
that can be used in an application similar to the one shown in the general block diagram of
Figure 1.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PSD311L | Field Programmable Microcontroller Peripherals(可編程邏輯,16K位SRAM,19個(gè)可編程I/O,通用PLD有12個(gè)輸入) |
| PSD311 | Field Programmable Microcontroller Peripherals(可編程邏輯,16K位SRAM,19個(gè)可編程I/O,通用PLD有12個(gè)輸入) |
| PSD312-15IB | Field-Programmable Peripheral |
| PSD312-20IB | Field-Programmable Peripheral |
| PSD313-90A | Hi-Rel Fixed Voltage Low Dropout 3-Terminal Negative Regulator; Qualified Part Number similar to OM2990-5STM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PSD303-12B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD303-12J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD303-12JI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD303-12LI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD303-12LM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
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