PIC16F628A-I/ML Microchip Technology, PIC16F628A-I/ML Datasheet - Page 114

• Manufacturer Part Number: PIC16F628A-I/ML
• Description: IC MCU FLASH 2KX14 EEPROM 28QFN
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F628A-I/ML

• Core Size: 8-Bit
• Program Memory Size: 3.5KB (2K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 224 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Controller Family/series: PIC16F
• No. Of I/o's: 16
• Eeprom Memory Size: 128Byte
• Ram Memory Size: 224Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 224 B
• Interface Type: SCI, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 1 x 16 bit
• 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, DM163014, DM164120-4
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC164324 - MODULE SKT FOR MPLAB 8DFN/16QFNXLT28QFN3 - SOCKET TRAN ICE 18DIP/28QFNI3DBF648 - BOARD DAUGHTER ICEPIC3AC164033 - ADAPTER 28QFN TO 18DIPAC162053 - HEADER INTERFACE ICD,ICD2 18DIPDV007003 - PROGRAMMER UNIVERSAL PROMATE II
• Data Converters: -
• Lead Free Status / Rohs Status: Details

supplied to or from the device, depending if the command
PIC16F627A/628A/648A
14.11 In-Circuit Serial Programming™
The PIC16F627A/628A/648A microcontrollers 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 customers to
manufacture boards with unprogrammed devices and
then program the microcontroller just before shipping
the product. This also allows the most recent firmware
or custom firmware to be programmed.
The device is placed into a Program/Verify mode by
holding the RB6 and RB7 pins low while raising the
MCLR (V
628A/648A
Specification” (DS41196) for details. RB6 becomes the
programming clock and RB7 becomes the programming
data. Both RB6 and RB7 are Schmitt Trigger inputs in
this mode.
After Reset, to place the device into Programming/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
was a load or a read. For complete details of serial
programming, please refer to “PIC16F627A/628A/648A
EEPROM
(DS41196).
A typical In-Circuit Serial Programming connection is
shown in Figure 14-18.
FIGURE 14-18:
DS40044G-page 114
External
Connector
Signals
Data I/O
CLK
+5V
V
(ICSP™)
0V
PP
PP
) pin from V
Memory
EEPROM
To Normal
Connections
To Normal
Connections
TYPICAL IN-CIRCUIT
SERIAL PROGRAMMING
CONNECTION
IL
Programming
to V
Memory
IHH
PIC16F627A/628A/648A
V
V
RA5/MCLR/V
RB6/PGC
RB7/PGD
. See “PIC16F627A/
V
DD
SS
DD
Programming
Specification”
PP
14.12 Low-Voltage Programming
The LVP bit of the Configuration Word, enables the low-
voltage
microcontroller to be programmed via ICSP using only
a 5V source. This mode removes the requirement of
V
normally erased to ‘1’ which enables the low-voltage
programming. In this mode, the RB4/PGM pin is
dedicated to the programming function and ceases to
be a general purpose I/O pin. The device will enter
Programming mode when a ‘1’ is placed on the RB4/
PGM pin. The High-Voltage Programming mode is still
available by placing V
If Low-Voltage Programming mode is not used, the
LVP bit should be programmed to a ‘0’ so that RB4/
PGM becomes a digital I/O pin. To program the device,
V
The LVP bit may only be programmed when program-
ming is entered with V
cannot be programmed when programming is entered
with RB4/PGM.
It should be noted, that once the LVP bit is programmed
to ‘0’, only High-Voltage Programming mode can be
used to program the device.
IHH
IHH
Note 1: While in this mode, the RB4 pin can no
must be placed onto MCLR during programming.
to be placed on the MCLR pin. The LVP bit is
2: V
programming.
longer be used as a general purpose I/O
pin.
operations.
DD
must be 5.0V +10% during erase
IHH
© 2009 Microchip Technology Inc.
IHH
on the MCLR pin.
This
on MCLR. The LVP bit
mode
allows
the