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2001 Microchip Technology Inc. DS30603B-page 1
PIC16C50X
This document includes the programming
specifications for the following devices:
1.0 PROGRAMMING THE
PIC16C50X
The PIC16C50X can be programmed using a serial
method. Due to this serial programming, the
PIC16C50X can be programmed while in the user’s
system, increasing design flexibility. This programming
specification applies to PIC16C50X devices in all
packages.
1.1 Hardware Requirements
The PIC16C50X requires two programmable power
supplies, one for V
DD (2.0V to 6.5V recommended) and
one for V
PP (12V to 14V). Both supplies should have a
minimum resolution of 0.25V.
1.2 Programming Mode
The Programming mode for the PIC16C50X allows
programming of user program memory, and the config-
uration word for the PIC16C50X.
Pin Diagram
• PIC16C505
PDIP, SOIC, Windowed CERDIP
PIC16C505
VDD
RB5/OSC1/CLKIN
RB4/OSC2/CLKOUT
RB3/MCLR
/VPP
RC5/T0CKI
RC4
RC3
V
SS
RB0
RB1
RB2
RC0
RC1
RC2
1
2
3
4
5
6
7
14
13
12
11
10
9
8
TABLE 1-1: PIN DESCRIPTIONS (DURING PROGRAMMING): PIC16C50X
Pin Name
During Programming
Pin Name Pin Type Pin Description
RB1 CLOCK I Clock Input
RB0 DATA I/O Data Input/Output
RB3/MCLR
/VPP VPP P Programming Power
VDD VDD P Power Supply
V
SS VSS PGround
Legend: I = Input, O = Output, P = Power
EPROM Memory Programming Specification
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