PIC16F785-I/SO Microchip Technology, PIC16F785-I/SO Datasheet - Page 123

• Manufacturer Part Number: PIC16F785-I/SO
• Description: IC PIC MCU FLASH 2KX14 20SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F785-I/SO

• Program Memory Type: FLASH
• Program Memory Size: 3.5KB (2K x 14)
• Package / Case: 20-SOIC (7.5mm Width)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 17
• Eeprom Size: 256 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: RS- 232/USB
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 17
• Number Of Timers: 3
• 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, DV164120, DM163029
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 14-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT20SO1-1 - SOCKET TRANS ICE 20DIP TO 20SOICXLT18SO-1 - SOCKET TRANSITION 18SOIC 300MILAC162060 - HEADER INTRFC MPLAB ICD2 20PINAC164039 - MODULE SKT PROMATE II 20DIP/SOIC
• Connectivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

15.8
If
programmed, the on-chip program memory can be
read out using ICSP for verification purposes.
15.9
Four memory locations (2000h – 2003h) are desig-
nated as ID locations where the user can store check-
sum or other code identification numbers. These
locations are not accessible during normal execution,
but are readable and writable during Program/Verify.
Only the Least Significant 7 bits of the ID locations are
used.
15.10 In-Circuit Serial Programming
The PIC16F785 microcontrollers can be serially
programmed while in the end application circuit. This is
simply done with five lines:
• clock
• data
• power
• ground
• programming voltage
This allows customers to manufacture boards with
unprogrammed devices and then program the micro-
controller just before shipping the product. This also
allows the most recent firmware or a custom firmware
to be programmed.
The device is placed into a Program/Verify mode by
holding the RA0 and RA1 pins low, while raising the
MCLR (V
Memory Programming Specification (DS41237) for
more information. RA0 becomes the programming data
and RA1 becomes the programming clock. Both RA0
and RA1 are Schmitt Trigger inputs in this mode.
After Reset, to place the device into Program/Verify
mode, the program counter (PC) is at location 00h. A
6-bit command is then supplied to the device.
Depending on the command, 14 bits of program data
are then supplied to or from the device, depending on
whether the command was a load or a read. For
complete details of serial programming, please refer to
the PIC16F785 Memory Programming Specification
(DS41237).
A typical In-Circuit Serial Programming connection is
shown in Figure 15-11.
 2004 Microchip Technology Inc.
Note:
the
Code Protection
ID Locations
code
PP
The entire data EEPROM and Flash
program memory will be erased when the
code protection is turned off by performing
a bulk erase. See the PIC16F785 Memory
Programming Specification (DS41237) for
more information.
) pin from V
protection
IL
to V
bit(s)
IHH
. See the PIC16F785
have
not
been
Preliminary
FIGURE 15-11:
* Isolation devices (as required)
External
Connector
Signals
Data I/O
CLK
+5V
V
0V
PP
*
To Normal
Connections
To Normal
Connections
TYPICAL IN-CIRCUIT
SERIAL PROGRAMMING
CONNECTION
*
PIC16F785
*
*
DS41249A-page 121
V
V
MCLR/V
RA1
RA0
DD
SS
PIC16F785
PP
/RA3