PIC12F508-I/SN Microchip Technology, PIC12F508-I/SN Datasheet - Page 54
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PIC12F508-I/SN
Manufacturer Part Number
PIC12F508-I/SN
Description
IC MCU FLASH 512X12 8SOIC
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)
4.PIC12F509-EMC.pdf
(106 pages)
Specifications of PIC12F508-I/SN
Program Memory Type
FLASH
Program Memory Size
768B (512 x 12)
Package / Case
8-SOIC (3.9mm Width)
Core Processor
PIC
Core Size
8-Bit
Speed
4MHz
Peripherals
POR, WDT
Number Of I /o
5
Ram Size
25 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC12F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
25 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
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC12F508-I/SN
Manufacturer:
MICROCHIP
Quantity:
13 000
Company:
Part Number:
PIC12F508-I/SN
Manufacturer:
Microchip Technology
Quantity:
75 450
Part Number:
PIC12F508-I/SN
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
PIC12F508/509/16F505
7.7
The TO, PD and (GPWUF/RBWUF) bits in the
STATUS register can be tested to determine if a Reset
condition has been caused by a Power-up condition, a
MCLR or Watchdog Timer (WDT) Reset.
TABLE 7-8:
7.8
A brown-out is a condition where device power (V
dips below its minimum value, but not to zero, and then
recovers. The device should be reset in the event of a
brown-out.
To reset PIC12F508/509/16F505 devices when a
brown-out occurs, external brown-out protection
circuits may be built, as shown in Figure 7-12 and
Figure 7-13.
FIGURE 7-12:
DS41236E-page 54
Legend: u = unchanged
Note 1:
Note 1:
GPWUF/
RBWUF
0
0
0
0
0
1
33k
2:
V
Time-out Sequence, Power-down
and Wake-up from Sleep Status
Bits (TO, PD, GPWUF/RBWUF)
Reset on Brown-out
DD
The TO, PD and GPWUF/RBWUF bits
maintain their status (u) until a Reset
occurs. A low-pulse on the MCLR input
does not change the TO, PD and
GPWUF/RBWUF Status bits.
This circuit will activate Reset when V
below Vz + 0.7V (where Vz = Zener voltage).
Pin must be confirmed as MCLR.
TO
0
0
1
1
u
1
10k
TO/PD/(GPWUF/RBWUF)
STATUS AFTER RESET
PD
0
u
0
1
u
0
BROWN-OUT
PROTECTION CIRCUIT 1
Q1
40k
WDT wake-up from Sleep
WDT time-out (not from
Sleep)
MCLR wake-up from Sleep
Power-up
MCLR not during Sleep
Wake-up from Sleep on pin
change
MCLR
(1)
V
Reset Caused By
DD
(2)
PIC16F505
PIC12F508
PIC12F509
DD
goes
DD
)
FIGURE 7-13:
FIGURE 7-14:
Note 1:
Note:
V
2:
SS
MCP809
RST
R1
R2
This brown-out circuit is less expensive,
although less accurate. Transistor Q1 turns
off when V
that:
Pin must be confirmed as MCLR.
V
This brown-out protection circuit employs
Microchip Technology’s MCP809 micro-
controller supervisor. There are 7 different
trip point selections to accommodate 5V to
3V systems.
DD
V
V
V
DD
DD
DD
Capacitor
•
Bypass
DD
BROWN-OUT
PROTECTION CIRCUIT 2
BROWN-OUT
PROTECTION CIRCUIT 3
R1 + R2
© 2009 Microchip Technology Inc.
is below a certain level such
R1
Q1
40k
V
DD
MCLR
(1)
= 0.7V
V
PIC16F505
PIC12F508
PIC12F509
DD
(2)
PIC16F505
PIC12F508
PIC12F509
MCLR