- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371276 > X88C75J Port Expander and E2 Memory PDF資料下載
參數(shù)資料
| 型號： | X88C75J |
| 英文描述： | Port Expander and E2 Memory |
| 中文描述： | 端口擴展和E2內存 |
| 文件頁數(shù)： | 15/27頁 |
| 文件大?。?/td> | 125K |
| 代理商： | X88C75J |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁當前第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁
X88C75 SLIC
E
2
15
Example 3
If an application requires larger program memory stor-
age and both extra ports, then example 2 does not meet
this requirement. Since the LAM feature uses port B to
output the non-multiplexed address, then port B cannot
be also used as general purpose I/O. The solution to this
problem is to use X68C64, which interfaces to a multi-
plexed bus and takes an active HIGH CE input. Example
3 maps the X68C64 to the top 8K program memory
space in the range of 8000-FFFFH. This approach
provides a total of 16K-bytes of program memory. Using
the same approach, two additional X68C64 device can
be added and A13-A14 can be used as their CE inputs,
Figure 17. Example 4
Figure 16. Example 3
for the total of 32K-bytes of program memory. Ports A
and B are still available to handle any general purpose
I/O functions.
Example 4
For those applications using extensive I/O, up to 128
I/O pins are obtained by placing 8 of the X88C75 devices
on the same bus. This approach gives a total of 64K-
bytes of program memory space, and 128 I/O pins. Note
that the SFRM can overlap the
E
2
M address space,
however, only the SFR resources are accessible and
the associated E
2
memory location are not available.
ALE
WR
RD
PSEN
ALE
WR
RD
PSEN
CE
CE
E
AS
SEL
WR
A/D7-A/D0
A12-A8
EA
A15
2887 ILL F20
STRA
PA
X88C75
8051
X68C64
A15:8
AD7:0
AD7:0
A15:8
STRB
PB
RESET
ALE
WR
RD
PSEN
EA
X8C5
8051
A15:8
2887 ILL F21
AD7:0
PA
ALE
WR
RD
PSEN
CE
STRB
PB
STRA
128 I/O
RESET
相關PDF資料 |
PDF描述 |
|---|---|
| X88C75JI | Port Expander and E2 Memory |
| X88C75JM | Port Expander and E2 Memory |
| X88C75L | Port Expander and E2 Memory |
| X88C75LI | Port Expander and E2 Memory |
| X88C75LM | Port Expander and E2 Memory |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| X88C75JI | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Port Expander and E2 Memory |
| X88C75JISLIC | 制造商:Intersil Corporation 功能描述:I/O PORT, 44 Pin, Plastic, PLCC |
| X88C75JM | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Port Expander and E2 Memory |
| X88C75L | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Port Expander and E2 Memory |
| X88C75LI | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Port Expander and E2 Memory |
發(fā)布緊急采購，3分鐘左右您將得到回復。