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參數(shù)資料
| 型號： | PSD301L |
| 英文描述： | Field Programmable Microcontroller Peripherals(可編程邏輯,16K位SRAM,19個可編程I/O,通用PLD有12個輸入) |
| 中文描述： | 現(xiàn)場可編程微控制器外圍設(shè)備（可編程邏輯，16K的位的SRAM，19余個可編程輸入/輸出，通用PLD的有12個輸入） |
| 文件頁數(shù)： | 11/23頁 |
| 文件大?。?/td> | 118K |
| 代理商： | PSD301L |
Flash Memory – Application Note 048
3-29
“DEFINITIONS
X = .x.;
page = [MCU_pgr1,MCU_pgr0];
“Don’t care
“address a10-a0 are not available as inputs to the PAD unless it has been assigned
“to Port C pins
address = [a15,a14,a13,a12, a11,X,X,X, X,X,X,X, X,X,X,X];
EQUATIONS
“For addresses that are assigned to Port C, they need to be latched by ALE
“ in the logic equations that follow:
“a10.le = ale;
a9.le = ale;
“************************************* PAD A equations *************************************
“The PAD A acts as the address decoder and generates chip select signals
“that select the internal PSD resources. The address is latched
“internally by the ALE.
The PSD drives the 8031 data bus only if one of
“the select lines and rd or psen are active.
“The following equations are examples only. Change the address space to fit
“the selected PSD device.
“rs0 is the internal PSD SRAM chip select that is active high.
“The read and write lines are connected to the SRAM in the PSD so only the address
“is necessary in the equation. The SRAM occupies 2KB of memory space and is defined
“in 2KB boundaries.
rs0 = ((address >=
^
h0800) & (address <=
^
h0FFF));
“es0-es7 are internal PSD EPROM block chip selects that are active high.
“es0-es7 are defined in 4KB, 8KB or 16KB boundaries, depending on the PSD device.
“The psen signal is used internally in the PSD to qualify the chip selects
“(read can also be used to access the EPROM, see ‘PSD Configuration’.
es0 = ((address >=
^
h0000) & (address <=
^
h0FFF)) ;
es1 = ((address >=
^
h1000) & (address <=
^
h1FFF)) ;
es2 = ((address >=
^
h2000) & (address <=
^
h2FFF)) ;
es3 = ((address >=
^
h3000) & (address <=
^
h3FFF)) ;
“csiop is the internal PSD chip select for the PSD I/O Port registers and is active high.
“csiop takes up 2KB bytes of memory space. Refer to the PSD Data Book
“for the address offsets of the registers.
csiop = ((address >=
^
h0000) & (address <=
^
h07FF));
Appendix A
(cont.)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PSD302R | Field Programmable Microcontroller Peripherals(可編程邏輯,無SRAM,19個可編程I/O,通用PLD有16個輸入) |
| PSD303L | Field Programmable Microcontroller Peripherals(可編程邏輯,16K位SRAM,19個可編程I/O,通用PLD有16個輸入) |
| PSD303 | Field Programmable Microcontroller Peripherals(可編程邏輯,16K位SRAM,19個可編程I/O,通用PLD有16個輸入) |
| PSD311L | Field Programmable Microcontroller Peripherals(可編程邏輯,16K位SRAM,19個可編程I/O,通用PLD有12個輸入) |
| PSD311 | Field Programmable Microcontroller Peripherals(可編程邏輯,16K位SRAM,19個可編程I/O,通用PLD有12個輸入) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PSD301L-15J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD301L-15JI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD301L-15LI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD301L-15LM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral |
| PSD301L-15U | 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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