PIC12F509T-I/SN Microchip Technology, PIC12F509T-I/SN Datasheet - Page 15
![no-image](/images/manufacturer_photos/0/4/439/microchip_technology_sml.jpg)
PIC12F509T-I/SN
Manufacturer Part Number
PIC12F509T-I/SN
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SOP,8PIN,PLASTIC
Manufacturer
Microchip Technology
Series
PIC® 12Fr
Datasheets
1.PIC12F509T-ISN.pdf
(110 pages)
2.PIC12F509T-ISN.pdf
(4 pages)
3.PIC12F509T-ISN.pdf
(20 pages)
Specifications of PIC12F509T-I/SN
Rohs Compliant
YES
Core Processor
PIC
Core Size
8-Bit
Speed
4MHz
Peripherals
POR, WDT
Number Of I /o
5
Program Memory Size
1.5KB (1K x 12)
Program Memory Type
FLASH
Ram Size
41 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
8-SOIC (3.9mm Width)
Processor Series
PIC12F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
41 B
Interface Type
RS- 232, USB
Maximum Clock Frequency
4 MHz
Number Of Programmable I/os
6
Number Of Timers
1
Operating Supply Voltage
2 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DV164101, DM163014, DV164120, DM163029
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
AC162059 - HEADER INTRFC MPLAB ICD2 8/14PIN
Eeprom Size
-
Data Converters
-
Connectivity
-
Lead Free Status / Rohs Status
Details
Other names
PIC12F509T-I/SN
PIC12F509T-I/SNTR
PIC12F509T-I/SNTR
5.0
For the PIC12F508/509, once code protection is
enabled, all program memory locations, 0x040-0x1FE
(F508) and 0x040-0x3FE (F509) inclusive, read all ‘0’s.
Program memory locations 0x000-0x03F, 0x1FF
(F508) and 0x3FF (F509) are always unprotected. The
user ID locations, backup OSCCAL location and the
Configuration Word read out in an unprotected fashion.
It is possible to program the user ID locations, backup
OSCCAL location and the Configuration Word after
code-protect is enabled.
5.1
It is recommended that the following procedure be
performed before any other programming is attempted.
It is also possible to turn code protection off (CP = 1)
using this procedure. However, all data within the
program memory will be erased when this
procedure is executed, and thus, the security of the
code is not compromised.
To disable code-protect:
a)
b)
c)
5.2
© 2007 Microchip Technology Inc.
Note:
Enter Program mode
Execute
command (001001)
Wait T
CODE PROTECTION
Disabling Code Protection
Embedding Configuration Word
and User ID Information in the
Hex File
ERA
Microchip Technology Incorporated feels
strongly that this feature is important for
the benefit of the end customer.
To allow portability of code, the program-
mer is required to read the Configuration
Word and user ID locations from the hex
file when loading the hex file. If Configura-
tion Word information was not present in
the hex file, then a simple warning
message may be issued. Similarly, while
saving a hex file, Configuration Word and
user ID information must be included. An
option to not include this information may
be provided.
Bulk
Erase
Program
Memory
Preliminary
5.3
5.3.1
Checksum is calculated by reading the contents of the
PIC12F508/509 memory locations and adding up the
opcodes up to the maximum user addressable location
(e.g., 0x1FF for the PIC12F508). Any Carry bits
exceeding 16 bits are neglected. Finally, the Configura-
tion Word (appropriately masked) is added to the
checksum. Checksum computation for the PIC12F508/
509 is shown in Table 5-1.
The checksum is calculated by summing the following:
• The contents of all program memory locations
• The Configuration Word, appropriately masked
• Masked user ID locations (when applicable)
The Least Significant 16 bits of this sum is the
checksum.
The following table describes how to calculate the
checksum for each device.
Note:
Checksum Computation
CHECKSUM
The checksum calculation differs depend-
ing on the code-protect setting. The
Configuration Word and user ID locations
can always be read regardless of the
code-protect settings.
PIC12F508/509
DS41227E-page 15