ADDRESSING I
參數(shù)資料
型號: MCP23S18-E/MJ
廠商: Microchip Technology
文件頁數(shù): 5/56頁
文件大小: 0K
描述: IC I/O EXPANDER SPI 16B 24QFN
標(biāo)準(zhǔn)包裝: 91
接口: SPI
輸入/輸出數(shù): 16
中斷輸出:
頻率 - 時鐘: 10MHz
電源電壓: 1.8 V ~ 5.5 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 24-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 24-QFN 裸露焊盤(4x4)
包裝: 托盤
產(chǎn)品目錄頁面: 684 (CN2011-ZH PDF)
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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