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參數(shù)資料
| 型號： | S9418 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | Quad 8-Bit Nonvolatile DACPOT⑩ Electronic Potentiometer With a Mute Control Input |
| 中文描述： | 四8位非易失DACPOT⑩電子電位隨著靜音控制輸入 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大小： | 50K |
| 代理商： | S9418 |
4
S9418
2023 1.5 4/24/99
FIGURE 2. WRITE SEQUENCE
NONVOLATILE WRITE
A nonvolatile write is a two step operation: it is initiated by
taking
CS
LOW and clocking in a start bit followed by the
NV Write Enable command. At this point the host can take
CS
back high or continue clocking in data. This data is
don’t care and will be ignored by the S9418.
Next, the host takes
CS
LOW again and issues a write
command and address and then clocks in the eight data
bits to be programmed. The host will then bring
CS
HIGH
FIGURE 3. NONVOLATILE WRITE SEQUENCE
and the data will be latched into the data register and a
nonvolatile write operation will commence.
The status of the nonvolatile write can be monitored on the
RDY/
BSY
pin. A logic low indicates the write is still in
progress and the S9418 will not be accessible to the host;
a logic high indicates the write has completed and the
S9418 is ready for the next command. Refer to Figure 3
for an illustration of the sequence of bus conditions for a
nonvolatile write operation.
S
T
A
R
T
C
D
A
C
D
A
1
0
3
4
5
6
7
1
1
2
0
0
D
D
D
D
D
D
CLK
DI
DO
RDY/BSY
Hi Z
Pulled Up to V
DD
CS
VOUT
2023 ILL5 1.0
A
0
1
D
CLK
DI
RDY/BSY
Pulled Up to V
DD
Rising Edge Sets
S
T
A
R
T
C
C
1
0
S
T
A
R
T
C
C
1
0
D
A
D
A
1
0
3
4
5
6
7
1
2
0
D
D
D
D
D
D
Address and Data
are Don’t Care
Rising Edge Starts
NV Write
NV Write Enable
Latch is Reset
CS
2023 ILL4 1.0
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