參數資料
型號: PSD413A1-C-15J
廠商: 意法半導體
英文描述: BBG ECL OR DUAL 3INPUT; Package: 20 LEAD PLLC; No of Pins: 20; Container: Tape and Reel; Qty per Container: 500
中文描述: 低成本現(xiàn)場可編程微控制器外圍設備
文件頁數: 65/123頁
文件大小: 657K
代理商: PSD413A1-C-15J
PSD4XX Famly
62
9.4.4 Memory Select Map For 8031 Application
The 8031 family of microcontrollers has separate code memory space and data memory
space. This feature requires a different Memory Select Map. Two modes of operation are
provided for 8031 applications. The selection of the modes is specified in the PSD4XX
PSDsoft Software (PSDconfiguration):
J
Separate Space Mode
In this mode, the PSEN signal is used to access code from EPROM, and the RD
signal is used to access data from SRAM. The code memory space is separated from
the data memory space.
J
Combined Space Mode
In this mode, the EPROM can be accessed by PSEN or RD. The EPROM is used for
code and data storage. The memory block's address space cannot overlap.
If data and code memory blocks must overlap each other, the RD signal can be included as
an additional address input in generating the EPROM chip select signals (ES0 – ES3). In
this case the EPROM access time is from the RD valid to data valid. Figures 32a and 32b
show the memory configuration in the two modes.
In some applications it is desirable to execute program codes in SRAM. The PSD4XX
provides this option by enabling PSEN to access SRAM. To activate this option, the
SRCODE bit of the VM Register must be set to “1” (see Table 17). SRAM space can
overlap EPROM space and has priority when PSEN is used.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
*
*
*
*
*
*
SRCODE
PIO
1 = ON
1 = ON
*
= Reserved for future use, bits set to zero.
Table 17. VM Register
The PSD4XX
Architecture
(cont.)
相關PDF資料
PDF描述
PSD413A1-C-15L 3-Input 3-Output OR Gate; Package: SOEIAJ-16; No of Pins: 16; Container: Rail; Qty per Container: 50
PSD401A1-C-12J HDC-HD-15BCM RoHS Compliant: Yes
PSD401A1-C-15J Low Cost Field Programmable Microcontroller Peripherals
PSD401A1-C-15L Low Cost Field Programmable Microcontroller Peripherals
PSD401A1-C-15U CONN MALE INSERT HA SIZE 5 16POS
相關代理商/技術參數
參數描述
PSD413A2-C-70L 制造商:WSI 功能描述:
PSD4-16 制造商:Tamura Corporation of America 功能描述:
PSD4-20 制造商:MICROTRAN 功能描述:POWER TRANSFORMER, 6 VA
PSD4235G2-70U 功能描述:SPLD - 簡單可編程邏輯器件 5.0V 4M 70ns RoHS:否 制造商:Texas Instruments 邏輯系列:TICPAL22V10Z 大電池數量:10 最大工作頻率:66 MHz 延遲時間:25 ns 工作電源電壓:4.75 V to 5.25 V 電源電流:100 uA 最大工作溫度:+ 75 C 最小工作溫度:0 C 安裝風格:Through Hole 封裝 / 箱體:DIP-24
PSD4235G2-90U 功能描述:CPLD - 復雜可編程邏輯器件 5.0V 4M 90ns RoHS:否 制造商:Lattice 系列: 存儲類型:EEPROM 大電池數量:128 最大工作頻率:333 MHz 延遲時間:2.7 ns 可編程輸入/輸出端數量:64 工作電源電壓:3.3 V 最大工作溫度:+ 90 C 最小工作溫度:0 C 封裝 / 箱體:TQFP-100