PIC16C505
TABLE 3-1:
Name
RB0
PIC16C505 PINOUT DESCRIPTION
DIP
Pin #
13
SOIC
Pin #
13
I/O/P
Type
I/O
Buffer
Type
Description
TTL/ST Bi-directional I/O port/ serial programming data. Can
be software programmed for internal weak pull-up and
wake-up from SLEEP on pin change. This buffer is a
Schmitt Trigger input when used in serial programming
mode.
TTL/ST Bi-directional I/O port/ serial programming clock. Can
be software programmed for internal weak pull-up and
wake-up from SLEEP on pin change. This buffer is a
Schmitt Trigger input when used in serial programming
mode.
TTL
TTL
TTL
TTL
TTL
TTL
ST
TTL
Bi-directional I/O port.
Bi-directional I/O port.
Bi-directional I/O port.
Bi-directional I/O port.
Bi-directional I/O port.
Bi-directional I/O port.
Bi-directional I/O port. Can be configured as T0CKI.
Input port/master clear (reset) input/programming volt-
age input. When configured as MCLR, this pin is an
active low reset to the device. Voltage on MCLR/V
PP
must not exceed V
DD
during normal device operation.
Can be software programmed for internal weak pull-up
and wake-up from SLEEP on pin change. Weak pull-
up only when configured as RB3.
Bi-directional I/O port/oscillator crystal output. Con-
nections to crystal or resonator in crystal oscillator
mode (XT and LP modes only, RB4 in other modes).
Can be software programmed for internal weak pull-up
and wake-up from SLEEP on pin change. In EXTRC
and INTRC modes, the pin output can be configured to
CLKOUT, which has 1/4 the frequency of OSC1 and
denotes the instruction cycle rate.
RB1
12
12
I/O
RB2
RC0
RC1
RC2
RC3
RC4
RC5/T0CKI
RB3/MCLR/V
PP
11
10
9
8
7
6
5
4
11
10
9
8
7
6
5
4
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
RB4/OSC2/CLKOUT
3
3
I/O
TTL
RB5/OSC1/CLKIN
2
2
I/O
TTL/ST Bidirectional IO port/oscillator crystal input/external
clock source input (RB5 in Internal RC mode only,
OSC1 in all other oscillator modes). TTL input when
RB5, ST input in external RC oscillator mode.
—
—
Positive supply for logic and I/O pins
Ground reference for logic and I/O pins
V
DD
V
SS
1
14
1
14
P
P
Legend: I = input, O = output, I/O = input/output, P = power, — = not used, TTL = TTL input,
ST = Schmitt Trigger input
©
1998 Microchip Technology Inc.
Preliminary
DS40192A-page 9
MICROCHIP [ MICROCHIP TECHNOLOGY ]
