Microchip Technology MA330017 Data Sheet
© 2007-2012 Microchip Technology Inc.
DS70283K-page 55
dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304
5.0
FLASH PROGRAM MEMORY
The dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304
devices contain internal Flash program memory for
storing and executing application code. The memory is
readable, writable and erasable during normal operation
over the entire V
devices contain internal Flash program memory for
storing and executing application code. The memory is
readable, writable and erasable during normal operation
over the entire V
DD
range.
Flash memory can be programmed in two ways:
• In-Circuit Serial Programming™ (ICSP™)
• In-Circuit Serial Programming™ (ICSP™)
programming capability
• Run-Time Self-Programming (RTSP)
ICSP allows a dsPIC33FJ32MC202/204 and
dsPIC33FJ16MC304 device to be serially programmed
while in the end application circuit. This is done with
two lines for programming clock and programming data
(one of the alternate programming pin pairs:
PGECx/PGEDx), and three other lines for power (V
ICSP allows a dsPIC33FJ32MC202/204 and
dsPIC33FJ16MC304 device to be serially programmed
while in the end application circuit. This is done with
two lines for programming clock and programming data
(one of the alternate programming pin pairs:
PGECx/PGEDx), and three other lines for power (V
DD
),
ground (V
SS
) and Master Clear (MCLR). This allows
customers to manufacture boards with unprogrammed
devices and then program the digital signal controller
just before shipping the product. This also allows the
most recent firmware or a custom firmware to be pro-
grammed.
RTSP is accomplished using TBLRD (table read) and
TBLWT (table write) instructions. With RTSP, the user
application can write program memory data either in
blocks or ‘rows’ of 64 instructions (192 bytes) at a time
or a single program memory word, and erase program
memory in blocks or ‘pages’ of 512 instructions (1536
bytes) at a time.
devices and then program the digital signal controller
just before shipping the product. This also allows the
most recent firmware or a custom firmware to be pro-
grammed.
RTSP is accomplished using TBLRD (table read) and
TBLWT (table write) instructions. With RTSP, the user
application can write program memory data either in
blocks or ‘rows’ of 64 instructions (192 bytes) at a time
or a single program memory word, and erase program
memory in blocks or ‘pages’ of 512 instructions (1536
bytes) at a time.
5.1
Table Instructions and Flash
Programming
Programming
Regardless of the method used, all programming of
Flash memory is done with the table read and table
write instructions. These allow direct read and write
access to the program memory space from the data
memory while the device is in normal operating mode.
The 24-bit target address in the program memory 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
Flash memory is done with the table read and table
write instructions. These allow direct read and write
access to the program memory space from the data
memory while the device is in normal operating mode.
The 24-bit target address in the program memory 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
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
both Word and Byte modes.
The TBLRDH and TBLWTH instructions are used to read
or write to bits <23:16> of program memory. TBLRDH
and TBLWTH can also access program memory in Word
or Byte mode.
read or write to bits <15:0> of program memory.
TBLRDL and TBLWTL can access program memory in
both Word and Byte modes.
The TBLRDH and TBLWTH instructions are used to read
or write to bits <23:16> of program memory. TBLRDH
and TBLWTH can also access program memory in Word
or Byte mode.
FIGURE 5-1:
ADDRESSING FOR TABLE REGISTERS
Note 1: This data sheet summarizes the features
of the dsPIC33FJ32MC202/204 and
dsPIC33FJ16MC304 devices. It is not
intended to be a comprehensive refer-
ence source. To complement the infor-
mation in this data sheet, refer to Section
5. “Flash Programming” (DS70191) of
the “dsPIC33F/PIC24H Family Refer-
ence Manual” which is available from the
Microchip web site (
dsPIC33FJ16MC304 devices. It is not
intended to be a comprehensive refer-
ence source. To complement the infor-
mation in this data sheet, refer to Section
5. “Flash Programming” (DS70191) of
the “dsPIC33F/PIC24H Family Refer-
ence Manual” which is available from the
Microchip web site (
www.microchip.com
)
2: Some registers and associated bits
described in this section may not be
available on all devices. Refer to
available on all devices. Refer to
in
this data sheet for device-specific register
and bit information.
and bit information.
0
Program Counter
24 bits
Program Counter
TBLPAG Reg
8 bits
Working Reg EA
16 bits
Byte
24-bit EA
0
1/0
Select
Using
Table Instruction
Table Instruction
Using
User/Configuration
Space Select
Space Select