PIC14000-04 Microchip Technology, PIC14000-04 Datasheet - Page 13

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

4.0
4.1
The PIC14000 has a 13-bit program counter capable of
addressing an 8K x 14 program memory space. Only
the first 4K x 14 (0000-0FFFh) are physically imple-
mented. Accessing a location above the physically
implemented address will cause a wraparound. The
reset vector is at 0000h and the interrupt vector is at
0004h (Figure 4-1).
The 4096 words of Program Memory space are divided
into:
• Address Vectors (addr 0000h-0004h)
• Program Memory Page 0 (addr 0005h-07FFH)
• Program Memory Page 1 (addr 0800h-0FBFh)
• Calibration Space (64 words, addr 0FC0h-0FFFh)
Program code may reside in Page 0 and Page 1.
FIGURE 4-1:
1996 Microchip Technology Inc.
RETFIE, RETLW
CALL, RETURN,
MEMORY ORGANIZATION
Program Memory Organization
Calibration Space
Memory (Page 0)
Memory (Page 1)
On-chip Program
On-chip Program
Interrupt Vector
PIC14000 PROGRAM
MEMORY MAP AND STACK
Stack Level 1
Stack Level 8
Reset Vector
(64 words)
PC<12:0>
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This document was created with FrameMaker 4 0 4
0004h
0005h
07FFh
0800h
0FBFh
0FC0h
0FFFh
1000h
20FFh
13
0000h
Preliminary
4.1.1
The calibration space is not used for instructions. This
section stores constants and factors for the arithmetic
calculations to calibrate the analog measurements.
TABLE 4-1:
** Microchip modified IEEE754 32-bit floating point format.
0FC0h-0FC3h
0FC4h-0FC7h
0FC8h-0FCBh
0FCCh-0FCFh
0FD0h
0FD2h
* Refer to AN621 for details.
Refer to application note AN575 for details.
Address
CALIBRATION SPACE
Slope
reference
ratio
Bandgap
reference
voltage
Tempera-
ture sensor
voltage
Tempera-
ture sensor
coefficient
Internal
oscillator
frequency
multiplier
WDT
time-out
Parameter Symbol
CALIBRATION DATA
OVERVIEW*
V
PIC14000
T
K
F
K
THERM
K
OSC
WDT
REF
BG
TC
DS40122B-page 13
Celsius
degree
Units
Volts/
Volts
Volts
N/A
N/A
ms
32-bit
floating
point **
32-bit
floating
point
32-bit
floating
point
32-bit
floating
point
Format
byte
byte