PIC16F913/914/916/917/946
EXAMPLE 3-7:
INITIALIZING PORTG
3.9
PORTG and TRISG Registers
BANKSELPORTG
CLRF PORTG
BANKSELTRISG
;
PORTG is an 8-bit port with Schmitt Trigger input
buffers. RG<5:0> are individually configured as inputs
or outputs, depending on the state of the port direction.
The port bits are also multiplexed with LCD segment
functions. PORTG is available on the PIC16F946 only.
;Init PORTG
;
;Set RG<5:0> as inputs
;
MOVLW
MOVWF
3Fh
TRISG
REGISTER 3-16: PORTG: PORTG REGISTER(1)
U-0
—
U-0
—
R/W-x
RG5
R/W-x
RG4
R/W-x
RG3
R/W-x
RG2
R/W-x
RG1
R/W-x
RG0
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’
RG<5:0>: PORTG I/O Pin bits
1= Port pin is >VIH min.
0= Port pin is <VIL max.
Note 1: PIC16F946 only.
REGISTER 3-17: TRISG: PORTG TRI-STATE REGISTER(1)
U-0
—
U-0
—
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
R/W-1
TRISG5
TRISG4
TRISG3
TRISG2
TRISG1
TRISG0
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’
TRISF<5:0>: PORTG Tri-State Control bits
1= PORTG pin configured as an input (tri-stated)
0= PORTG pin configured as an output
Note 1: PIC16F946 only.
DS41250F-page 84
© 2007 Microchip Technology Inc.
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