 2003 Microchip Technology Inc.

DS80023C-page 3

PIC12C508/509

TABLE 11-1:

PULL-UP RESISTOR RANGES - PIC12C508/C509

1.

Module: RESET

When MCLR is asserted, the state of the OSC1/CLKIN

and CLKOUT/OSC2 pins are as follows:

CLKIN/CLKOUT PIN STATES WHEN MCLR

ASSERTED

V

Temperature (

°C)

Min

Typ

Max

Units

GP0/GP1

2.5

-40

38K

42K

63K

Ω

25

42K

48K

63K

Ω

85

42K

49K

63K

Ω

125

50K

55K

63K

Ω

5.5

-40

15K

17K

20K

Ω

25

18K

20K

23K

Ω

85

19K

22K

25K

Ω

125

22K

24K

28K

Ω

2.5

-40

65K

80K

850K

Ω

25

80K

100K

1150K

Ω

85

85K

110K

1300K

Ω

125

100K

120K

1500K

Ω

5.5

-40

50K

60K

600K

Ω

25

60K

65K

750K

Ω

85

65K

80K

900K

Ω

125

75K

90K

990K

Ω

*

These parameters are characterized but not tested.

Note 1: The weak pull-up resistor and associated current for the GP3/MCLR pin is non-linear when the respective

pin voltage is less than V

Oscillator Mode

OSC1/CLKIN Pin

OSC2/CLKOUT Pin

EXTRC, CLKOUT

on OSC2

OSC1 pin is

tristated and driven

by external circuit

OSC2 pin is driven

low

EXTRC, OSC2 is

I/O

OSC1 pin is

tristated and driven

by external circuit

OSC2 pin is tristate

input

INTRC, CLKOUT

on OSC2

OSC1 pin is tristate

input

OSC2 pin is driven

low

INTRC, OSC2 is

I/O

OSC1 pin is tristate

input

OSC2 pin is tristate

input