描述
樹莓派I2C 128 GPIO擴充板
1. JP4 U1 Port A JP3 U1 Port B
2. JP7 U2 Port A JP8 U2 Port B
3. JP2 U3 Port A JP1 U3 Port B
4. JP5 U4 Port A JP6 U4 Port B
5. JP11 U5 Port A JP12 U5 Port B
6. JP13 U6 Port A JP14 U6 Port B
7. JP16 U7 Port A JP15 U7 Port B
8. JP10 U8 Port A JP9 U8 Port B
9. U1 (20) 23017 -1 Port A,B U2 (21) 23017-2 Port A,B
10. U3 (22) 23017 -3 Port A,B U4 (23) 23017-4 Port A,B
11. U5 (24) 23017 -1 Port A,B U6 (25) 23017-2 Port A,B
12. U7 (26) 23017 -3 Port A,B U8 (27) 23017-4 Port A,B
13. J1 i2c signal input (PIN 1-4) GND, 5V, SDA, SCL
支援 Pi_Scratch
U1 to U4 i2c 23017 address 20,21,22,23
U5 to U8 i2c 23017 address 24,25,26,27
Command “i2” + “address(20-27)” + “a” +”bit(1 to 8)” for Port A
Command “i2” + “address(20-27)” + “b” +”bit(1 to 8)” for Port B
Command “bit”+ “address(20-27)” + “a” +”bit(8 to 1)” for Port A
Command “bit”+ “address(20-27)” + “b” +”bit(8 to 1)” for Port B
i221a1 –> i2c address 21 Port A bit 1 ON/OFF
i220b7 –> i2c address 20 Port B bit 7 ON/OFF
i222b4 –> i2c address 22 Port B bit 4 ON/OFF
bit22b01010101 –> address 22 port B from bit 8 to 1
output –> 01010101
bit20a01010101 –> address 20 port A from bit 8 to 1
output –> 01010101
bit21aoff –> address 21 Port A all OFF/clear
bit23aclr –> address 23 Port A all OFF/clear
相關資料：
商品內容：
1x Rs-Pi I2C 23017-8 – 128 GPIO board
1x Manual
