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MCP2210 bảng dữ liệu(PDF) 46 Page - Microchip Technology

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Giải thích chi tiết về linh kiện  USB-to-SPI Protocol Converter with GPIO (Master Mode)
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MCP2210 bảng dữ liệu(HTML) 46 Page - Microchip Technology

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MCP2210
DS22288A-page 46
 2011 Microchip Technology Inc.
3.2.5
GET (VM) GPIO CURRENT PIN DIRECTION
3.2.5.1
Responses
FIGURE 3-16:
GET (VM) GPIO CURRENT PIN DIRECTION LOGIC FLOW
TABLE 3-42:
COMMAND STRUCTURE
Byte
Index
Meaning
0
0x33 – Get (VM) GPIO Current Pin Direction
1
0x00 – Reserved
2
0x00 – Reserved
3-63
0x00 – Reserved
TABLE 3-43:
RESPONSE 1 STRUCTURE
Byte
Index
Meaning
00x33 – Get (VM) GPIO Current Pin Direction – echos back the given command code
10x00 – Command Completed Successfully
2
Don’t Care
3
Don’t Care
4
GPIO Direction – 16-bit value (low byte):
• MSB
–
–
–
–
–
–
LSB
GP7DIR GP6DIR GP5DIR GP4DIR GP3DIR GP2DIR GP1DIR GP0DIR
5
GPIO Direction – 16-bit value (high byte):
• MSB
–
–
–
–
–
–
LSB
x
x
x
x
x
x
x
GP8DIR
6-63
Don’t Care
Note 1:
This command will only have an effect on those GPs previously configured as GPIOs.
Get RAM GPIO
Direction
Response 1
RAM GPIO
Direction
Retrieved



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