PIC16F636T-I/SL(2005) View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
PIC16F636T-I/SL
(Rev.:2005)
(Rev.:2005)
Microchip Technology
PIC16F636T-I/SL Datasheet PDF : 196 Pages
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PIC12F635/PIC16F636/639
REGISTER 4-1:
WDA – WEAK PULL-UP/PULL-DOWN REGISTER (ADDRESS: 97h)
U-0
U-0
R/W-1 R/W-1
U-0
R/W-1 R/W-1
—
—
WDA5 WDA4
—
WDA2 WDA1
bit 7
R/W-1
WDA0
bit 0
bit 7-6
bit 5-4
bit 3
bit 2-0
Unimplemented: Read as ‘0’
WDA<5:4>: Pull-up/Pull-down Selection bits
1 = Pull-up selected
0 = Pull-down selected
Unimplemented: Read as ‘0’
WDA<2:0>: Pull-up/Pull-down Selection bits
1 = Pull-up selected
0 = Pull-down selected
Note 1: The weak pull-up/pull-down device is enabled only when the global RAPU bit is
enabled, the pin is in Input mode (TRIS = 1), the individual WDA bit is enabled
(WDA = 1) and the pin is not configured as an analog input or clock function.
2: RA3 pull-up is enabled when the pin is configured as MCLR in the Configuration
Word register and the device is not in Programming mode.
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
REGISTER 4-2:
WPUDA – WEAK PULL-UP/PULL-DOWN DIRECTION REGISTER (ADDRESS: 95h)
U-0
U-0
R/W-1
R/W-1
U-0
R/W-1 R/W-1 R/W-1
—
— WPUDA5(3) WPUDA4(3)
—
WPUDA2 WPUDA1 WPUDA0
bit 7
bit 0
bit 7-6
bit 5-4
bit 3
bit 2-0
Unimplemented: Read as ‘0’
WPUDA<5:4>: Pull-up/Pull-down Direction Selection bits(3)
1 = Pull-up/pull-down enabled
0 = Pull-up/pull-down disabled
Unimplemented: Read as ‘0’
WPUDA<2:0>: Pull-up/Pull-down Direction Selection bits
1 = Pull-up/pull-down enabled
0 = Pull-up/pull-down disabled
Note 1: The weak pull-up/pull-down direction device is enabled only when the global RAPU bit
is enabled, the pin is in Input mode (TRIS = 1), the individual WPUDA bit is enabled
(WPUDA = 1) and the pin is not configured as an analog input or clock function.
2: RA3 pull-up is enabled when the pin is configured as MCLR in the Configuration
Word register and the device is not in Programming mode.
3: WPUDA5 bit can be written if INTOSC is enabled and T1OSC is disabled;
otherwise, the bit can not be written and reads as ‘1’. WPUDA4 bit can be written
if not configured as OSC2; otherwise, the bit can not be written and reads as ‘1’.
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
DS41232B-page 40
Preliminary
© 2005 Microchip Technology Inc.
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