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鍙冩暩(sh霉)璩囨枡
鍨嬭櫉锛� MCP23S17-E/SS
寤犲晢锛� Microchip Technology
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鐢�(ch菐n)鍝佺洰閷勯爜闈細 684 (CN2011-ZH PDF)
閰嶇敤锛� MCP23X17EV-ND - BOARD EVAL FOR MCP23X17
GPIODM-KPLCD-ND - BOARD DEMO LCD GPIO EXP KEYPAD
MCP23017/MCP23S17
DS21952B-page 6
2007 Microchip Technology Inc.
1.3.2.2
I2C Read Operation
I2C Read operations include the control byte sequence,
as shown in the bottom of Figure 1-1. This sequence is
followed by another control byte (including the Start
condition and ACK) with the R/W bit set (R/W = 1). The
MCP23017 then transmits the data contained in the
addressed register. The sequence is ended with the
master generating a Stop or Restart condition.
1.3.2.3
I2C Sequential Write/Read
For sequential operations (Write or Read), instead of
transmitting a Stop or Restart condition after the data
transfer, the master clocks the next byte pointed to by
the address pointer (see Section 1.3.1 鈥淏yte Mode
and Sequential Mode鈥� for details regarding sequential
operation control).
The sequence ends with the master sending a Stop or
Restart condition.
The MCP23017 Address Pointer will roll over to
address zero after reaching the last register address.
Refer to Figure 1-1.
1.3.3
SPI INTERFACE
1.3.3.1
SPI Write Operation
The SPI write operation is started by lowering CS. The
Write command (slave address with R/W bit cleared) is
then clocked into the device. The opcode is followed by
an address and at least one data byte.
1.3.3.2
SPI Read Operation
The SPI read operation is started by lowering CS. The
SPI read command (slave address with R/W bit set) is
then clocked into the device. The opcode is followed by
an address, with at least one data byte being clocked
out of the device.
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. (see Section 1.3.1
regarding sequential operation control).
The sequence ends by the raising of CS.
The MCP23S17 Address Pointer will roll over to
address zero after reaching the last register address.
鐩搁棞(gu膩n)PDF璩囨枡
PDF鎻忚堪
MNT-105-BK-G CONN SHUNT 10POS
MS3102C22-34P CONN RCPT 5POS BOX MNT W/PINS
VE-212-IY CONVERTER MOD DC/DC 15V 50W
MS3102A22-33P CONN RCPT 7POS BOX MNT W/PINS
VI-B12-IY CONVERTER MOD DC/DC 15V 50W
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MCP23S17T-E/SO 鍒堕€犲晢:Microchip Technology Inc 鍔熻兘鎻忚堪:IC I/O EXPANDER 16BIT 10MHZ SOIC-28 鍒堕€犲晢:Microchip Technology Inc 鍔熻兘鎻忚堪:IC, I/O EXPANDER, 16BIT, 10MHZ, SOIC-28
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