PIC14000-04 Microchip Technology, PIC14000-04 Datasheet - Page 75

• Manufacturer Part Number: PIC14000-04
• Description: 28-Pin Programmable Mixed Signal Controller
• Manufacturer: Microchip Technology

10.0
What sets apart a microcontroller from other
processors are special circuits to deal with the needs of
real time applications. The PIC14000 has a host of
such features intended to maximize system reliability,
minimize
components, provide power saving operating modes
and offer code protection. These are:
• OSC (oscillator) selection
• Reset options
FIGURE 10-1: CONFIGURATION WORD
B13-B8
B7
B6
B5
B4
B3
B2
B1
B0
2007h
BITS
Read/Write
Erased value
1996 Microchip Technology Inc.
- Crystal/resonator
- Internal oscillator
- Power-on Reset (POR)
- Power-up Timer (PWRT)
- Oscillator Start-up Timer (OST)
Bit
SPECIAL FEATURES OF THE
CPU
cost
r
CPC
r
CPP1
CPP0
PWRTE
WDTE
r
FOSC
through
Bit 13-8
Name
R/W
1
r
elimination
This document was created with FrameMaker 4 0 4
Bit 7
CPC
R/W
Reserved
Calibration Space Code Protection Bit
1 = Calibration space is readable and programmable
0 = Calibration space is write protected
Reserved
Program Space Code Protection Bit
1 = Program space is readable and programmable
0 = Program space is read/write protected
Program Space Code Protection Bit
1 = Program space is readable and programmable
0 = Program space is read/write protected
Power-up Timer Enable Bit
1 = Power-up timer is disabled
0 = Power-up timer is enabled
Watchdog Timer Enable Bit
1 = WDT is enabled
0 = WDT is disabled
Reserved
Oscillator Selection Bit
1 = IN oscillator (internal)
0 = HS oscillator (crystal/resonator)
1
of
Reserved
Bit 6
external
1
r
Preliminary
CPP1 CPP0 PWRTE WDTE
Bit 5
R/W
1
• Interrupts
• Watchdog Timer (WDT)
• SLEEP and HIBERNATE modes
• Code protection
• In-circuit serial programming
These features will be described in the following
sections.
10.1
The configuration bits can be programmed (read as '0')
or left unprogrammed (read as '1') to select various
device configurations. These bits are mapped in pro-
gram memory location 2007h.
The user will note that address 2007h is beyond the
user program memory space. In fact, it belongs to the
special test/configuration memory space (2000h -
3FFFh), which can be accessed only during program-
ming.
Bit 4
R/W
1
Function
Configuration Bits
Bit 3
R/W
1
Bit 2
R/W
1
PIC14000
Reserved
Bit 1
DS40122B-page 75
1
r
FOSC
Bit 0
R/W
1