參數(shù)資料
型號(hào)： MCP3422EV
廠商： Microchip Technology
文件頁(yè)數(shù)： 14/58頁(yè)
文件大小： 0K
描述： BOARD EVAL MCP3422 PICKIT SERIAL
產(chǎn)品培訓(xùn)模塊： MCP3901 Analog Front End
標(biāo)準(zhǔn)包裝： 1
系列： PICkit™
ADC 的數(shù)量： 2
位數(shù)： 18
采樣率（每秒）： 3.75
數(shù)據(jù)接口： 串行
輸入范圍： ±2.048 V
工作溫度： -40°C ~ 125°C
已用 IC / 零件： MCP3422
已供物品： 板
產(chǎn)品目錄頁(yè)面： 672 (CN2011-ZH PDF)
相關(guān)產(chǎn)品： MCP3422A0T-E/SNTR-ND - IC ADC 18BIT 3.75SPS 2CH 8-SOIC
MCP3422A0T-E/MSTR-ND - IC ADC 18BIT 3.75SPS 2CH 8-MSOP
MCP3422A0T-E/MCTR-ND - IC ADC 18BIT 3.75SPS 2CH 8-DFN
MCP3422A0-E/SN-ND - IC ADC 18BIT3.75SPS 2CH 8-SOIC
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MCP3422A0-E/MC-ND - IC ADC 18BIT 3.75SPS 2CH 8-DFN
2009 Microchip Technology Inc.
DS22088C-page 21
MCP3422/3/4
TABLE 5-3:
ADDRESS BITS VS. ADDRESS
SELECTION PINS FOR
(MCP3423 AND MCP3424
5.3.3
WRITING A CONFIGURATION BYTE
TO THE DEVICE
When the Master sends an address byte with the R/W
bit low (R/W = 0), the device expects one configuration
byte following the address. Any byte sent after this
second byte will be ignored. The user can change the
operating
mode
of
the
device
by
writing
the
configuration register bits.
If the device receives a write command with a new
configuration setting, the device immediately begins a
new conversion and updates the conversion data.
FIGURE 5-3:
Timing Diagram For Writing To The MCP3422/3/4.
I2C Device
Address Bits
Logic Status of Address
Selection Pins
A2
A1
A0
Adr0 Pin
Adr1 Pin
000
0 (Addr_Low)
001
0 (Addr_Low)
Float
010
0 (Addr_Low)
1 (Addr_High)
100
1 (Addr_High)
0 (Addr_Low)
101
1 (Addr_High)
Float
110
1 (Addr_High)
011
Float
0 (Addr_Low)
111
Float
1 (Addr_High)
000
Float
Note 1:
Float: (a) Leave pin without connecting to
anything (left floating), or (b) apply
Addr_Float voltage.
2:
The user can tie the pins to VSS or VDD:
- Tie to VSS for Addr_Low
- Tie to VDD for Addr_High
3:
See Addr_Low, Addr_High, and
Addr_Float parameters in Electrical
9
1
9
1
Stop Bit by
11
0
1A2 A1 A0
R/W
ACK by
RDY
C1 C0
O/C
S1 S0 G1 G0
1st Byte:
2nd Byte:
Master
ACK by
Address Byte
Configuration Byte
Start Bit by
Master
with Write command
Note:
– Stop bit can be issued any time during writing.
– MCP3422/3/4 device code is 1101 (programmed at the factory).
– See Figure 5-1 for details in Address Byte.
SCL
SDA
(a) One-Shot Mode: 1
(b) Continuous Mode: not effected
MCP3422/3/4
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