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ADuC7060
GP0CON1 Control Registers
The GP0CON1 write values are as follows: GP0KEY1 = 0x7,
GP0CON1 = user value, and GP0KEY2 = 0x13.
Name:
Address:
GP0CON1
0xFFFF0468
Name
Address:
Default value:
Access:
Function:
GP0KEY1
0xFFFF0464
0xXXXX
Write only
When writing to GP0CON1, the value of 0x07
Default value:
Access:
Function:
0x00
Read and write
This register controls the P0.0, P0.1, P0.2 and
P0.3 functionality of the multifunction GPIO
pins.
must be written to this register in the
instruction immediately before writing to
Table 118. GP0CON1 MMR Bit Designations
GP0CON1.
Table 116. GPxCLR MMR Bit Descriptions
Bit
Description
31:24
Reserved.
23:16
Data Port x clear bit.
Set to 1 by user to clear the bit on Port x; also clears
the corresponding bit in the GPxDAT MMR.
Cleared to 0 by user; does not affect the data output.
15:0
Reserved.
Table 117. GP0CON1 Write Sequence
Name
Value
GP0KEY1
0x7
GP0CON1
User value
GP0KEY2
0x13
Bit
7:2
1
0
Name
Reserved
SPII2CSEL
ADCSEL
Description
These bits must always be set to 0.
This bit configures the P0.0 to P0.3 functions
in I 2 C or SPI mode. Note that Bit 0 of GP0CON1
must be set to 0 for this bit to work.
To select the P0.0, P0.1,P0.2 and P0.3 functions
in SPI mode, clear this bit to 0.
To select the P0.0, P0.1,P0.2 and P0.3 functions
in I 2 C mode, set this bit to 1.
This bit is cleared by default.
This bit configures the P0.0 to P0.3 functions
as GPIO pins or as ADC input pins.
To enable P0.0, P0.1, P0.2 and P0.3 functions
as ADC inputs, set this bit to 1.
To enable P0.0, P0.1, P0.2, and P0.3 functions
as digital I/O, clear this bit to 0.
This bit is cleared by default.
Name:
Address:
Default value:
Access:
Function:
GP0KEY2
0xFFFF046C
0xXXXX
Write only
When writing to GP0CON1, the value of 0x13
must be written to this register in the
instruction immediately after writing to
POWCON0.
Rev. 0 | Page 98 of 100
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