PIC16F616 Microchip Technology Inc., PIC16F616 Datasheet - Page 125

• Manufacturer Part Number: PIC16F616
• Description: 14-pin Flash-based, 8-bit Cmos Microcontrollers
• Manufacturer: Microchip Technology Inc.

12.10 In-Circuit Serial Programming™
The PIC16F610/616/16HV610/616 microcontrollers
can be serially programmed while in the end
application circuit. This is simply done with five
connections for:
• 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
12F61X/16F61X Memory Programming Specification”
(DS41284) for more information. RA0 becomes the
programming data and RA1 becomes the programming
clock. Both RA0 and RA1 are Schmitt Trigger inputs in
Program/Verify mode.
A typical In-Circuit Serial Programming connection is
shown in Figure 12-10.
FIGURE 12-10:
© 2007 Microchip Technology Inc.
Note:
External
Connector
Signals
* Isolation devices (as required)
Data I/O
CLK
+5V
V
0V
PP
PP
) pin from V
To erase, the device V
the Bulk Erase V
“PIC12F615/12HV615/16F616/16HV616
Memory
(DS41284)
*
To Normal
Connections
To Normal
Connections
TYPICAL IN-CIRCUIT
SERIAL PROGRAMMING
CONNECTION
IL
*
Programming
to V
*
*
IHH
DD
. See the “PIC12F60X/
minimum given in the
V
V
MCLR/V
RA1
RA0
PIC16F610/16HV610
PIC16F616/16HV616
DD
SS
DD
must be above
PP
Specification”
/RA3
PIC16F610/616/16HV610/616
Preliminary
12.11 In-Circuit Debugger
Since in-circuit debugging requires access to three
pins, MPLAB
device is not practical. A special 28-pin PIC16F610/
616/16HV610/616 ICD device is used with MPLAB ICD
2 to provide separate clock, data and MCLR pins and
frees all normally available pins to the user.
A special debugging adapter allows the ICD device to
be used in place of a PIC16F610/616/16HV610/616
device. The debugging adapter is the only source of the
ICD device.
When the ICD pin on the PIC16F610/616/16HV610/
616 ICD device is held low, the In-Circuit Debugger
functionality is enabled. This function allows simple
debugging functions when used with MPLAB ICD 2.
When the microcontroller has this feature enabled,
some of the resources are not available for general
use. Table 12-9 shows which features are consumed
by the background debugger.
TABLE 12-9:
For more information, see “MPLAB
Debugger User’s Guide” (DS51331), available on
Microchip’s web site (www.microchip.com).
FIGURE 12-11:
Resource
I/O pins
Stack
Program Memory
28-Pin PDIP
ICDMCLR
ICDDATA
ICDCLK
®
In-Circuit Debug Device
RC5
RC4
RC3
CS0
CS1
CS2
RA5
RA4
RA3
V
ICD 2 development with an 14-pin
NC
DD
DEBUGGER RESOURCES
Description
ICDCLK, ICDDATA
1 level
Address 0h must be NOP
700h-7FFh
28-PIN ICD PINOUT
10
11
12
13
14
1
2
3
4
5
6
7
8
9
28
27
26
25
24
23
22
21
20
18
17
16
19
15
DS41288C-page 123
®
GND
RA0
RA1
SHUNTEN
RA2
RC0
RC1
RC2
NC
NC
NC
NC
NC
ICD
ICD 2 In-Circuit