參數(shù)資料
型號： MCP23S18T-E/SP
元件分類： 微控制器/微處理器
英文描述： PIA-GENERAL PURPOSE, PDIP28
封裝： 0.300 INCH, PLASTIC, SPDIP-28
文件頁數(shù)： 5/56頁
文件大?。?/td> 738K
代理商： MCP23S18T-E/SP
2008 Microchip Technology Inc.
DS22103A-page 13
MCP23018/MCP23S18
FIGURE 1-5:
HARDWARE ADDRESS DECODE TIMING
1.4.2
ADDRESSING I2C DEVICES
(MCP23018)
The MCP23018 is a slave I2C device that supports 7-
bit slave addressing, with the read/write bit filling out
the control byte. The slave address contains four fixed
bits and three user-defined hardware address bits (pins
A2, A1, and A0). Figure 1-6 shows the control byte
format.
1.4.3
ADDRESSING SPI DEVICES
(MCP23S18)
The MCP23S18 is a slave SPI device. The slave
address contains seven fixed bits(no address bits) with
the read/write bit filling out the control byte. Figure 1-7
shows the control byte format.
FIGURE 1-6:
I2C CONTROL BYTE
FORMAT
FIGURE 1-7:
SPI CONTROL BYTE
FORMAT
VDD
adc_en
i2c_addr[2:0]
i2c_clk
tADEN
tADDRLAT
tADDIS
S
0
1
0
A2A1A0 R/W ACK
Start
bit
Slave Address
R/W bit
ACK bit
Control Byte
R/W = 0 = write
R/W = 1 = read
0
1000
00
R/W
Slave Address
R/W bit
Control Byte
R/W = 0 = write
R/W = 1 = read
CS
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