Datasheet

© 2010 Microchip Technology Inc. DS70139G-page 49
dsPIC30F2011/2012/3012/3013
5.0 FLASH PROGRAM MEMORY
The dsPIC30F family of devices contains internal
program Flash memory for executing user code. There
are two methods by which the user can program this
memory:
1. Run-Time Self-Programming (RTSP)
2. In-Circuit Serial Programming™ (ICSP™)
5.1 In-Circuit Serial Programming
(ICSP)
dsPIC30F devices can be serially programmed while in
the end application circuit. This is simply done with two
lines for Programming Clock and Programming Data
(which are named PGC and PGD respectively), and
three other lines for Power (V
DD), Ground (VSS) and
Master Clear (MCLR). This allows customers to
manufacture boards with unprogrammed devices, and
then program the microcontroller just before shipping
the product. This also allows the most recent firmware
or a custom firmware to be programmed.
5.2 Run-Time Self-Programming
(RTSP)
RTSP is accomplished using TBLRD (table read) and
TBLWT (table write) instructions.
With RTSP, the user may erase program memory, 32
instructions (96 bytes) at a time and can write program
memory data, 32 instructions (96 bytes) at a time.
5.3 Table Instruction Operation
Summary
The TBLRDL and the TBLWTL instructions are used to
read or write to bits<15:0> of program memory.
TBLRDL and TBLWTL can access program memory in
Word or Byte mode.
The TBLRDH and TBLWTH instructions are used to read
or write to bits<23:16> of program memory. TBLRDH
and TBLWTH can access program memory in Word or
Byte mode.
A 24-bit program memory address is formed using
bits<7:0> of the TBLPAG register and the Effective
Address (EA) from a W register specified in the table
instruction, as shown in Figure 5-1.
FIGURE 5-1: ADDRESSING FOR TABLE AND NVM REGISTERS
Note: This data sheet summarizes features of
this group of dsPIC30F devices and is not
intended to be a complete reference
source. For more information on the CPU,
peripherals, register descriptions and
general device functionality, refer to the
“dsPIC30F Family Reference Manual”
(DS70046). For more information on the
device instruction set and programming,
refer to the “16-bit MCU and DSC
Programmer’s Reference Manual”
(DS70157).
0
Program Counter
24 bits
NVMADRU Reg
8 bits 16 bits
Program
Using
TBLPAG Reg
8 bits
Working Reg EA
16 bits
Using
Byte
24-bit EA
1/0
0
1/0
Select
Table
Instruction
NVMADR
Addressing
Counter
Using
NVMADR Reg EA
User/Configuration
Space Select