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MCP47FVB11 数据表(PDF) 53 Page - Microchip Technology

部件名 MCP47FVB11
功能描述  8- /10- /12-Bit Single/Dual Voltage Output Volatile Digital-to-Analog Converters with I짼C??Interface
PDF  92 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

MCP47FVB11 数据表(HTML) 53 Page - Microchip Technology

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 2015 Microchip Technology Inc.
DS20005405A-page 53
MCP47FVBXX
7.1.2
CONTINUOUS WRITES TO
VOLATILE MEMORY
A Continuous Write mode of operation is possible when
writing to the device’s volatile memory registers (see
Table 7-1). This Continuous Write mode allows writes
without a Stop or Restart condition or repeated trans-
missions of the I2C Control Byte. Figure 7-3 shows the
sequence for three continuous writes. The writes do not
need to be to the same volatile memory address. The
sequence ends with the master sending a Stop or
Restart condition.
7.1.3
THE HIGH VOLTAGE COMMAND
(HVC) SIGNAL
The High Voltage Command (HVC) signal is used to
indicate that the command, or sequence of commands,
are in the High Voltage operational state. High Voltage
Command support allows I2C signal voltage compati-
bility with MCP47FEBXX devices.
FIGURE 7-2:
I2C ACK / NACK Behavior (Write Command Example).
TABLE 7-1:
VOLATILE MEMORY
ADDRESSES
Address
Single-Channel
Dual-Channel
00h
Yes
Yes
01h
No
Yes
08h
Yes
Yes
09h
Yes
Yes
0Ah
Yes
Yes
Note:
Writes to a volatile DAC register will not
transfer to the output register until the LAT
(HVC) pin is transitioned from the VIHHEN
voltage to a VIL voltage.
Write 1 Byte Command
SSlave Address
Command
Data Byte
Data Byte
P
Master
S S
A
6
S
A
5
S
A
4
S
A
3
S
A
2
S
A
1
S
A
0
01A
D
4
A
D
3
A
D
2
A
D
1
A
D
0
C
1
C
0
xA
C
K
D
1
5
D
1
4
D
1
3
D
1
2
D
1
1
D
1
0
D
0
9
D
0
8
1D
0
7
D
0
6
D
0
5
D
0
4
D
0
3
D
0
2
D
0
1
D
0
0
1P
Example 1 (No Command Error)
Master
S 1 1 000 00 010 00 010 0x 1dd dd ddd d1 ddd dd dd d1P
MCP47FVBXXA0
0
0
0
0
I2C™ Bus S 11 000 00 000 00 010 0x 0dd dd ddd d0 ddd dd dd d0P
Example 2 (Command Error)
Master
S 1 1 000 00 010 11 110 0x 1dd dd ddd d1 ddd dd dd d1P
MCP47FVBXXA0
0
1
1
1
I2C Bus
S 11 000 00 000 11 110 0x 0dd dd ddd d1 ddd dd dd d1P
Note:
Once a Command Error has occurred (Example 2) the MCP47FVBXX will NACK until a Start condition occurs.



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