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MCP2221 Datasheet(PDF) 46 Page - Microchip Technology

Part # MCP2221
Description  USB 2.0 to I2C??UART Protocol Converter with GPIO
PDF  80 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP2221 Datasheet(HTML) 46 Page - Microchip Technology

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MCP2221
DS20005292B-page 46
 2015 Microchip Technology Inc.
3.1.11.1
Responses
15
GP3 output value
0x00
GP3 (if set up for GPIO output operation) will take a logical value of ‘0’.
Any other
value
GP3 (if set up for GPIO output operation) will take a logical value of ‘1’
16
Alter GP3 pin direction
(enable/disable)
0x00
Leave the GP3 GPIO designation as is (input or output)
Any other
value
The next byte (index 17) will be the value used to set GP3’s pin direction
(only if GP3 is set for GPIO operation)
17
GP3 pin direction
(input or output)
0x00
Set GP3 GPIO as output
Any other
value
GP3 (if set up for GPIO operation) will be set as a digital input
18-63 Reserved
0x00
TABLE 3-33:
RESPONSE 1 STRUCTURE
Byte
Index
Function
Description
Value
Effect
0
0x50
Set GPIO Output Values – command code
1
0x00
Command completed successfully
2
Alter GP0 output
(enable/disable) status
0xEE
If GP0 is not set for GPIO operation
Any other
value
If GP0 is already set for GPIO operation, the value will be copied from
the same byte index in the command structure
3
GP0 output value status
0xEE
If GP0 is not set for GPIO operation
Any other
value
If GP0 is already set for GPIO operation, the value will be copied from
the same byte index in the command structure
4
Alter GP0 pin direction
(enable/disable)
0xEE
If GP0 is not set for GPIO operation
Any other
value
If GP0 is already set for GPIO operation, the value will be copied from
the same byte index in the command structure
5
GP1 pin direction
(input or output)
0xEE
If GP1 is not set for GPIO operation
Any other
value
If GP1 is already set for GPIO operation, the value will be copied from
the same byte index in the command structure
6
Alter GP1 output
(enable/disable) status
0xEE
If GP1 is not set for GPIO operation
Any other
value
If GP1 is already set for GPIO operation, the value will be copied from
the same byte index in the command structure
7
GP1 output value status
0xEE
If GP1 is not set for GPIO operation
Any other
value
If GP1 is already set for GPIO operation, the value will be copied from
the same byte index in the command structure
8
Alter GP1 pin direction
(enable/disable)
0xEE
If GP1 is not set for GPIO operation
Any other
value
If the GP1 is already set for GPIO operation, the value will be copied
from the same byte index in the command structure
9
GP1 pin direction
(input or output)
0xEE
If GP1 is not set for GPIO operation
Any other
value
If GP1 is already set for GPIO operation, the value will be copied from
the same byte index in the command structure
10
Alter GP2 output
(enable/disable) status
0xEE
If GP2 is not set for GPIO operation
Any other
value
If GP2 is already set for GPIO operation, the value will be copied from
the same byte index in the command structure
TABLE 3-32:
COMMAND STRUCTURE (CONTINUED)
Byte
Index
Function
Description
Value
Effect



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