PIC12C509A/JW Microchip Technology, PIC12C509A/JW Datasheet - Page 46

• Manufacturer Part Number: PIC12C509A/JW
• Description: IC MCU EPROM 1KX12 8CDIP
• Manufacturer: Microchip Technology
• Series: PIC® 12Cr

Specifications of PIC12C509A/JW

• 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: EPROM, UV
• Ram Size: 41 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 8-CDIP (0.300", 7.62mm) Window
• For Use With: DVMCPA - KIT DVR BOARD EVAL SYSTEM MXDEV1DVA12XP080 - ADAPTER DEVICE FOR MPLAB-ICE
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Other names: PIC12C509A/JWR; PIC12C509A/JWR

PIC12C5XX
8.12
The PIC12C5XX microcontrollers with EPROM pro-
gram memory can be serially programmed while in the
end application circuit. This is simply done with two
lines for clock and data, and three other lines for power,
ground, and the programming voltage. This allows cus-
tomers 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 pro-
grammed.
The device is placed into a program/verify mode by
holding the GP1 and GP0 pins low while raising the
MCLR (V
specification). GP1 becomes the programming clock
and GP0 becomes the programming data. Both GP1
and GP0 are Schmitt Trigger inputs in this mode.
After reset, a 6-bit command is then supplied to the
device. Depending on the command, 14-bits of pro-
gram data are then supplied to or from the device,
depending if the command was a load or a read. For
complete details of serial programming, please refer to
the PIC12C5XX Programming Specifications.
A typical in-circuit serial programming connection is
shown in Figure 8-16.
DS40139E-page 46
In-Circuit Serial Programming
PP
) pin from V
IL
to V
IHH
(see programming
FIGURE 8-16: TYPICAL IN-CIRCUIT SERIAL
External
Connector
Signals
Data I/O
CLK
+5V
V
0V
PP
PROGRAMMING
CONNECTION
To Normal
Connections
To Normal
Connections
1999 Microchip Technology Inc.
V
V
MCLR/V
GP1
GP0
V
DD
SS
DD
PIC12C5XX
PP