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參數(shù)資料
| 型號(hào)： | X68C64PM |
| 英文描述： | E2 Micro-Peripheral |
| 中文描述： | E2微型外設(shè) |
| 文件頁數(shù)： | 4/12頁 |
| 文件大?。?/td> | 62K |
| 代理商： | X68C64PM |
X68C64
4
MODE SELECTION
CE
E
R/
W
Mode
I/O
Power
V
SS
LOW
HIGH
HIGH
X
X
X
X
Standby
Standby
Read
Write
High Z
High Z
D
OUT
D
IN
Standby (CMOS)
Standby (TTL)
Active
Active
HIGH
HIGH
LOW
3868 PGM T02.1
requirements. The rising edge of E starts a timer delay-
ing the internal programming cycle 100
μ
s. Therefore,
each successive write operation must begin within 100
μ
s
of the last byte written. The following waveforms illus-
trate the sequence and timing requirements.
PAGE WRITE OPERATION
Regardless of the microcontroller employed, the X68C64
supports page mode write operations. This allows the
microcontroller to write from one to thirty-two bytes of
data to the X68C64. Each individual write within a page
write operation must conform to the byte write timing
Page Write Timing Sequence for E Controlled Operation
Notes:
(1) For each successive write within a page write cycle A
5
–A
12
must be the same.
(2) Although it is not illustrated, the microcontroller may interleave read operations between the individual byte writes within the page
write operation. Two responses are possible.
a. Reading from the same plane being written (A
12
of Read = A
12
of Write) is effectively a Toggle Bit Polling operation.
b. Reading from the opposite plane being written (A
12
of Read
≠
A
12
of Write) true data will be returned, facilitating the use of a
single memory component as both program and data storage.
3868 FHD F07
tBLC
CE
AS
A/D0–A/D7
A8–A12
E
R/W
AIN
DIN
A12=n
OPERATION
BYTE 0
BYTE 1
BYTE 2
LAST BYTE
READ (1)(2)
AFTER tWC READY FOR
NEXT WRITE OPERATION
tWC
AIN
DIN
A12=n
AIN
DIN
A12=n
AIN
DIN
A12=n
AIN
DIN
A12=x
AIN
ADDR
AIN
Next Address
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| X68C64S | E2 Micro-Peripheral |
| X68C64SI | E2 Micro-Peripheral |
| X68C64SM | E2 Micro-Peripheral |
| X68C75 | Port Expander and E2 Memory |
| X68C75J | Port Expander and E2 Memory |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X68C64S | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:E2 Micro-Peripheral |
| X68C64SI | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:E2 Micro-Peripheral |
| X68C64SM | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:E2 Micro-Peripheral |
| X68C75 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Port Expander and E2 Memory |
| X68C75J | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Port Expander and E2 Memory |
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