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参数资料
| 型号： | X28HC64P-12 |
| 厂商： | Intersil |
| 文件页数： | 4/17页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 64KBIT 120NS 28DIP |
| 标准包装： | 13 |
| 格式 - 存储器： | EEPROMs - 并行 |
| 存储器类型： | EEPROM |
| 存储容量： | 64K (8K x 8) |
| 速度： | 120ns |
| 接口： | 并联 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 28-DIP（0.600"，15.24mm） |
| 供应商设备封装： | 28-PDIP |
| 包装： | 管件 |
X28HC64
DATA Polling (I/O 7 )
The X28HC64 features DATA Polling as a method to indicate
to the host system that the byte write or page write cycle has
completed. DATA Polling allows a simple bit test operation to
determine the status of the X28HC64, eliminating additional
interrupt inputs or external hardware. During the internal
programming cycle, any attempt to read the last byte written
will produce the complement of that data on I/O 7 (i.e. write
data = 0xxx xxxx, read data = 1xxx xxxx). Once the
programming cycle is complete, I/O 7 will reflect true data.
DATA Polling I/O 7
Last
Toggle Bit (I/O 6 )
The X28HC64 also provides another method for determining
when the internal write cycle is complete. During the internal
programming cycle I/O 6 will toggle from HIGH to LOW and
LOW to HIGH on subsequent attempts to read the device.
When the internal cycle is complete the toggling will cease
and the device will be accessible for additional read or write
operations.
WE
Write
CE
OE
V IH
I/O 7
H IGH Z
V OL
V OH
X28HC64
Ready
A 0 –A 12
An
An
An
An
An
An
An
FIGURE 2. DATA POLLING BUS SEQUENCE
DATA Polling can effectively reduce the time for writing to the
WRITE DATA
WRITES
COMPLETE?
YES
SAVE LAST DATA
AND ADDRESS
READ LAST
ADDRESS
IO 7
NO
NO
X28HC64. The timing diagram in Figure 2 illustrates the
sequence of events on the bus. The software flow diagram in
Figure 3 illustrates one method of implementing the routine.
COMPARE?
YES
READY
FIGURE 3. DATA POLLING SOFTWARE FLOW
4
FN8109.2
August 28, 2009
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相关代理商/技术参数 |
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|---|---|
| X28HC64P-50 | 制造商:XICOR 制造商全称:Xicor Inc. 功能描述:5 Volt, Byte Alterable E2PROM |
| X28HC64P-55 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:x8 EEPROM |
| X28HC64P70 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:IC |
| X28HC64P-70 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述: |
| X28HC64P-90 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述: |
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