PIC17C756A MICROCHIP [Microchip Technology], PIC17C756A Datasheet - Page 192

• Manufacturer Part Number: PIC17C756A
• Description: High-Performance 8-bit CMOS EPROM Microcontrollers with 10-bit A/D
• Manufacturer: MICROCHIP [Microchip Technology]

PIC17C7XX
17.1
The PIC17CXXX has eight configuration locations
(Table 17-1). These locations can be programmed
(read as ’0’), or left unprogrammed (read as ’1’) to
select various device configurations. Any write to a
configuration location, regardless of the data, will pro-
gram that configuration bit. A TABLWT instruction and
raising the MCLR/V
are both required to write to program memory loca-
tions. The configuration bits can be read by using the
TABLRD instructions. Reading any configuration loca-
tion between FE00h and FE07h will read the low byte
of the configuration word (Figure 17-1) into the TAB-
LATL register. The TABLATH register will be FFh.
Reading a configuration location between FE08h and
FE0Fh will read the high byte of the configuration word
into the TABLATL register. The TABLATH register will
be FFh.
Addresses FE00h through FE0Fh are only in the pro-
gram memory space for Microcontroller and Code Pro-
tected Microcontroller modes. A device programmer
will be able to read the configuration word in any pro-
cessor mode. See programming specifications for
more detail.
TABLE 17-1:
DS30289B-page 192
Note:
WDTPS0
WDTPS1
Configuration Bits
BODEN
FOSC0
FOSC1
PM0
PM1
PM2
When programming the desired configura-
tion locations, they must be programmed
in ascending order, starting with address
FE00h.
Bit
CONFIGURATION
LOCATIONS
PP
pin to the programming voltage
Address
FE0Eh
FE0Fh
FE00h
FE01h
FE02h
FE03h
FE04h
FE06h
17.2
17.2.1
The PIC17CXXX can be operated in four different oscil-
lator modes. The user can program two configuration
bits (FOSC1:FOSC0) to select one of these four
modes:
• LF
• XT
• EC
• RC
For information on the different oscillator types and
how to use them, please refer to Section 4.0.
Oscillator Configurations
Low Power Crystal
Crystal/Resonator
External Clock Input
Resistor/Capacitor
OSCILLATOR TYPES
2000 Microchip Technology Inc.