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| 型號： | X88C64SMB |
| 英文描述： | E2 Micro-Peripheral |
| 中文描述： | E2微型外設(shè) |
| 文件頁數(shù)： | 4/14頁 |
| 文件大小： | 71K |
| 代理商： | X88C64SMB |
X88C64
4
Data Memory Mode
This mode of operation allows both read and write
functions. The
PSEN
input is tied to V
IH
or to V
CC
through a pull-up resistor. The ALE,
RD
, and
WR
inputs
are tied directly to the microcontroller’s ALE,
RD
, and
WR
outputs.
Read
This operation is quite similar to the Program Memory
read. A HIGH to LOW transition on ALE latches the
addresses and the data will be output on the AD pins
after
RD
goes LOW (t
RLDV
).
Write
A write is performed by latching the addresses on the
falling edge of ALE. Then
WR
is strobed LOW followed
by valid data being presented at the A/D
0
–A/D
7
pins.
The data will be latched into the X88C64 on the rising
edge of
WR
. To write to the X88C64, a three-byte
command sequence must precede the byte(s) being
written. (See Software Data Protection.)
MODE SELECTION
CE
PSEN
RD
WR
Mode
I/O
Power
V
CC
HIGH
LOW
LOW
LOW
X
X
X
X
X
X
Standby
Standby
Program Fetch
Data Read
Write
High Z
High Z
D
OUT
D
OUT
D
IN
Standby (CMOS)
Standby (TTL)
Active
Active
Active
LOW
HIGH
HIGH
HIGH
LOW
HIGH
HIGH
HIGH
3867 PGM T02.2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| X88C64S | E2 Micro-Peripheral |
| X88C75 | Port Expander and E2 Memory |
| X88C75J | Port Expander and E2 Memory |
| X88C75JI | Port Expander and E2 Memory |
| X88C75JM | Port Expander and E2 Memory |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X88C75 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Port Expander and E2 Memory |
| X88C75J | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Port Expander and E2 Memory |
| 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 |
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