PIC16C712 functions, features, application areas, and methods and precautions for replacing 16C711

1. PIC16C712 microcontroller functions, features, and application areas 

1. Functions and features: 
PIC16C712 microcontroller is an enhanced product based on the functions of 711 chip launched by Microchip. It is pin-to-pin compatible with 16C711. Its functions and prices are better than 16C711. The following table is a functional comparison table of 16C712 and 16C711:

The added functions are as follows: 
a. CCP module 
b. Two timers are added c. 
RAM is enlarged, 711 has 68 bytes, 712 has 128 bytes. 
If more program space is needed, the PIC16C716 microcontroller can also be selected. 

2. Application fields: 
In addition to the original application fields of 16C711 single-chip microcomputer, the addition of CCP module with PWM function has expanded the application scope, such as use in mobile phone smart chargers. 
The product models of alternative competitors are as follows:

2. Development tools: 
Writer: PICSTART-PLUS (Fireware v2.01, Mplab v5.10) 
Emulator: Please consult the relevant emulator manufacturer. 
3. Methods and precautions for replacing 16C711 MCU When 
the original 711 program is transplanted to 712, the following matters should be noted: 
1. Modify the following register addresses. (As shown in the table below) 
PIC16C711 PIC16C712
ADCON0 08H 1FH
ADRES 09H and 89H 1EH
ADCON1 88H 9FH
PCON 87H 8EH

This can be solved by changing the INCLUDE header file.
2. Redefine the following flags: (as shown in the following table)

3. To enable any external interrupt (including A/D), PEIE (INTCON<6>) must be set to 1. That is, when enabling each interrupt, the instruction BSF PEIE must be added. 
4. Different selections of A/D conversion pins 

a. The definition of A/D control register ADCON1 in 711 MCU is as follows:

b. The definition of A/D control register ADCON1 in 712/716 microcontroller is as follows:

PCFG2:PCFG0 defines the A/D port as follows:

Note: A = analog input port D = digital I/O port VREF = reference voltage

5. Modify the address of the common register. 
The address range of the common register of the 711 chip is 0C~4F, while the address range of the common register of the 712/716 chip is 20~7F. Therefore, the common register address used in the original 711 program must be within the address range of the common register of the 712/716 microcontroller.