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MCP2221 데이터시트(PDF) 48 Page - Microchip Technology

부품명 MCP2221
상세설명  USB 2.0 to I2C??UART Protocol Converter with GPIO
PDF  80 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP2221 데이터시트(HTML) 48 Page - Microchip Technology

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MCP2221
DS20005292B-page 48
 2015 Microchip Technology Inc.
3.1.12
GET GPIO VALUES
This command is used to retrieve the GPIO direction
and pin value for those GP pins assigned for GPIO
operation (GPIO inputs or outputs).
3.1.12.1
Responses
TABLE 3-34:
COMMAND STRUCTURE
Byte
Index
Value
Effect
0
0x51
Get GPIO Values – command code
1-63
Don’t
care
TABLE 3-35:
RESPONSE 1 STRUCTURE
Byte
Index
Function
Description
Value
Effect
0
0x51
Get GPIO Values – command code
1
0x00
Command completed successfully
2
GP0 pin value
0xEE
If GP0 is not set for GPIO operation
Other values
(0x00 or 0x01)
If GP0 is already set for GPIO operation, the value represents the GP0 logic
pin value
3GP0 direction
value
0xEF
If GP0 is not set for GPIO operation
Other values
(0x00 or 0x01)
If GP0 is already set for GPIO operation, the value represents the GP0 pin
designation (0x00 for output and 0x01 for input)
4
GP1 pin value
0xEE
If GP1 is not set for GPIO operation
Other values
(0x00 or 0x01)
If GP1 is already set for GPIO operation, the value represents the GP1 logic
pin value
5GP1 direction
value
0xEF
If GP1 is not set for GPIO operation
Other values
(0x00 or 0x01)
If GP1 is already set for GPIO operation, the value represents the GP1 pin
designation (0x00 for output and 0x01 for input)
6
GP2 pin value
0xEE
If GP2 is not set for GPIO operation
Other values
(0x00 or 0x01)
If GP2 is already set for GPIO operation, the value represents the GP2 logic
pin value
7GP2 direction
value
0xEF
If GP2 is not set for GPIO operation
Other values
(0x00 or 0x01)
If GP2 is already set for GPIO operation, the value represents the GP2 pin
designation (0x00 for output and 0x01 for input)
8
GP3 pin value
0xEE
If GP3 is not set for GPIO operation
Other values
(0x00 or 0x01)
If GP3 is already set for GPIO operation, the value represents the GP3 logic
pin value
9GP3 direction
value
0xEF
If GP3 is not set for GPIO operation
Other values
(0x00 or 0x01)
If GP3 is already set for GPIO operation, the value represents the GP3 pin
designation (0x00 for output and 0x01 for input)
10-63
Don’t care



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