參數(shù)資料
型號(hào)： ZPSD401A1
英文描述： Field Programmable Microcontroller Peripherals(可編程邏輯，零功耗，16K位SRAM,40個(gè)可編程I/O,通用PLD有37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，零功耗，16K的位的SRAM，40余個(gè)可編程輸入/輸出，通用PLD的有37個(gè)輸入）
文件頁數(shù)： 62/108頁
文件大小： 626K
代理商： ZPSD401A1
ZPSD4XX Famly
5-62
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 ZPSD4XX
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 33a and 33b
show the memory configuration in the two modes.
In some applications it is desirable to execute program codes in SRAM. The ZPSD4XX
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.
Memory
Block
(Cont.)
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
相關(guān)PDF資料
PDF描述
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ZPSD412A2 Field Programmable Microcontroller Peripherals(可編程邏輯，零功耗，16K位SRAM,40個(gè)可編程I/O,通用PLD有59個(gè)輸入)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ZPSD401A1-12J 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral
ZPSD401A1-12JI 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral
ZPSD401A1-12LI 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral
ZPSD401A1-12U 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Field-Programmable Peripheral
ZPSD401A1-12UI 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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