Datasheet

PIC14000
DS40122B-page 10
Preliminary
 1996 Microchip Technology Inc.
Legend:
RD3/REFB 3 I/O-PU AN/ST CMOS General purpose I/O or programmable reference B
output.
RD4/AN4 26 I/O AN/ST CMOS Analog input channel 4. This pin can also serve as a
GPIO.
RD5/AN5 25 I/O AN/ST CMOS Analog input channel 5. This pin can connect to a level
shift network. If enabled, a +0.5V offset is added to the
input voltage. This pin can also serve as a GPIO.
RD6/AN6 24 I/O AN/ST CMOS Analog input channel 6. This pin can also serve as a
GPIO.
RD7/AN7 23 I/O AN/ST CMOS Analog input channel 7. This pin can also serve as a
GPIO.
VREG 10 O — AN This pin is an output to control the gate of an external
N-FET for voltage regulation.
OSC1/PBTN 8 I-PU ST — IN Mode: Input with weak pull-up resistor, can be used to
generate an interrupt.
HS Mode: External oscillator input.
OSC2/
CLKOUT
7 O — CMOS IN Mode: General purpose output.
HS Mode: External oscillator/clock output.
MCLR
/VPP 14 I/PWR ST Master clear (reset) input / programming voltage input.
This pin is an active low reset to the device.
V
DD
9 PWR Positive supply connection
V
SS
20 GND Return supply connection
Type: Definition:
TTL TTL-compatible input
CMOS CMOS-compatible input or output
ST Schmitt Trigger input, with CMOS levels
SM SMBus compatible input
OD Open-drain output. An external pull-up resistor is required if this pin is used as an output.
NPU N-channel pull-up. This pin will pull-up to approximately V
DD
- 1.0V when outputting a logical ‘1’.
PU Weak internal pull-up (10K-50K ohms)
No-P diode No P-diode to V
DD
. This pin may be pulled above the supply rail (to 6.0V maximum).
AN Analog input or output
TABLE 3-1: PIN DESCRIPTIONS (CONTINUED)
Pin Name
Pin
No.
I/O
Pin Type
Input Output
Description