PIC12F629/675
REGISTER 3-2:
TRISIO: GPIO TRI-STATE REGISTER (ADDRESS: 85h)
U-0
U-0
—
R/W-1
R/W-1
R-1
R/W-1
R/W-1
R/W-1
TRISIO5
TRISIO4
TRISIO3
TRISIO2
TRISIO1
TRISIO0
—
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
bit 7-6
bit 5-0
Unimplemented: Read as ‘0’
TRISIO<5:0>: General Purpose I/O Tri-State Control bit
1= GPIO pin configured as an input (tri-stated)
0= GPIO pin configured as an output
Note:
TRISIO<3> always reads ‘1’.
REGISTER 3-3:
WPU: WEAK PULL-UP REGISTER (ADDRESS: 95h)
U-0
—
U-0
—
R/W-1
WPU5
R/W-1
WPU4
U-0
—
R/W-1
WPU2
R/W-1
WPU1
R/W-1
WPU0
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
bit 7-6
bit 5-4
Unimplemented: Read as ‘0’
WPU<5:4>: Weak Pull-up Register bit
1= Pull-up enabled
0= Pull-up disabled
bit 3
Unimplemented: Read as ‘0’
bit 2-0
WPU<2:0>: Weak Pull-up Register bit
1= Pull-up enabled
0= Pull-up disabled
Note 1: Global GPPU must be enabled for individual pull-ups to be enabled.
2: The weak pull-up device is automatically disabled if the pin is in Output mode (TRISIO = 0).
DS41190G-page 22
2010 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
