MCP23008 I2
參數(shù)資料
型號(hào): MCP23S08-E/P
廠商: Microchip Technology
文件頁(yè)數(shù): 42/44頁(yè)
文件大?。?/td> 0K
描述: IC I/O EXPANDER SPI 8B 18DIP
產(chǎn)品培訓(xùn)模塊: GPIO Expanders
標(biāo)準(zhǔn)包裝: 25
接口: SPI
輸入/輸出數(shù): 8
中斷輸出:
頻率 - 時(shí)鐘: 10MHz
電源電壓: 1.8 V ~ 5.5 V
工作溫度: -40°C ~ 125°C
安裝類(lèi)型: 通孔
封裝/外殼: 18-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 18-PDIP
包裝: 管件
包括: POR
產(chǎn)品目錄頁(yè)面: 684 (CN2011-ZH PDF)
配用: GPIODM-KPLCD-ND - BOARD DEMO LCD GPIO EXP KEYPAD
2007 Microchip Technology Inc.
DS21919E-page 7
MCP23008/MCP23S08
FIGURE 1-1:
MCP23008 I2C DEVICE PROTOCOL
1.3.3.3
SPI Sequential Write/Read
For sequential operations, instead of deselecting the
device by raising CS, the master clocks the next byte
pointed to by the address pointer.
The sequence ends by the raising of CS.
The MCP23S08 address pointer will roll over to
address zero after reaching the last register address.
1.4
Hardware Address Decoder
The hardware address pins are used to determine the
device address. To address a device, the correspond-
ing address bits in the control byte must match the pin
state.
MCP23008 has address pins A2, A1 and A0.
MCP23S08 has address pins A1 and A0.
The pins must be biased externally.
S
P
SR
w
R
OP
ADDR
DOUT
DIN
- START
- RESTART
- STOP
- Write
- Read
- Device opcode
- Device address
- Data out from MCP23008
- Data into MCP23008
S
P
SR
W
R
OP
ADDR
DIN
....
S
P
W
R
OP
ADDR
DOUT
....
P
SR
W
OP
DIN
....
P
SR
R
DOUT
....
P
OP
DOUT
....
P
SR
OP
DIN
....
P
OP
DIN
S
P
W
OP
ADDR
DIN
....
Byte and Sequential Write
S
W
OP
SR
R
OP
DOUT
....
P
Byte and Sequential Read
S
W
OP
ADDR
DIN
P
S
W
OP
SR
R
OP
DOUT
P
Byte
Sequential
Byte
Sequential
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