PIC16LF1717TESLASHMLQTP datasheet(13/482 Pages) MICROCHIP

13 / 482 page

 2014-2020 Microchip Technology Inc.

DS40001740D-page 13

PIC16(L)F1717/8/9

1.1

Conventions

1.1.1

When there are multiple instances of the same

peripheral in a device, the peripheral control registers

will be depicted as the concatenation of a peripheral

identifier, peripheral instance and control identifier. The

control registers section will show just one instance of

all the register names with an ‘x’ in the place of the

peripheral instance number. This naming convention

may also be applied to peripherals when there is only

one instance of that peripheral in the device to maintain

compatibility with other devices in the family that

contain more than one.

1.1.2

BIT NAMES

There are two variants for bit names:

• Short name: Bit function abbreviation

• Long name: Peripheral abbreviation + short name

1.1.2.1

Short Bit Names

Short bit names are an abbreviation for the bit function.

For example, some peripherals are enabled with the

EN bit. The bit names shown in the registers are the

short name variant.

Short bit names are useful when accessing bits in C

programs. The general format for accessing bits by the

short name is RegisterNamebits.ShortName. For

example, the enable bit, EN, in the COG1CON0 regis-

ter can be set in C programs with the instruction

COG1CON0bits.EN = 1.

Short names are generally not useful in assembly

programs because the same name may be used by

different peripherals in different bit positions. When this

occurs, during the include file generation, all instances

of that short bit name are appended with an underscore

plus the name of the register in which the bit resides to

avoid naming contentions.

1.1.2.2

Long Bit Names

Long bit names are constructed by adding a peripheral

abbreviation prefix to the short name. The prefix is

unique to the peripheral thereby making every long bit

name unique. The long bit name for the COG1 enable

bit is the COG1 prefix, G1, appended with the enable

bit short name, EN, resulting in the unique bit name

G1EN.

Long bit names are useful in both C and assembly pro-

grams. For example, in C the COG1CON0 enable bit

can be set with the G1EN = 1 instruction. In assembly,

this bit can be set with the BSF COG1CON0,G1EN

instruction.

1.1.2.3

Bit Fields

Bit fields are two or more adjacent bits in the same

convention. For example, the three Least Significant

bits of the COG1CON0 register contain the mode

control bits. The short name for this field is MD. There

is no long bit name variant. Bit field access is only

possible in C programs. The following example

demonstrates a C program instruction for setting the

COG1 to the Push-Pull mode:

COG1CON0bits.MD = 0x5;

Individual bits in a bit field can also be accessed with

long and short bit names. Each bit is the field name

appended with the number of the bit position within the

field. For example, the Most Significant mode bit has

the short bit name MD2, and the long bit name is

G1MD2. The following two examples demonstrate

assembly program sequences for setting the COG1 to

Push-Pull mode:

Example 1:

MOVLW

~(1<<G1MD1)

ANDWF

COG1CON0,F

MOVLW

1<<G1MD2 | 1<<G1MD0

IORWF

COG1CON0,F

Example 2:

BSF

COG1CON0,G1MD2

BCF

COG1CON0,G1MD1

BSF

COG1CON0,G1MD0

1.1.3

EXCEPTIONS

1.1.3.1

Status, Interrupt and Mirror Bits

Status, interrupt enables, interrupt flags and mirror bits

are contained in registers that span more than one

peripheral. In these cases, the bit name shown is

unique, so there is no prefix or short name variant.

1.1.3.2

Legacy Peripherals

There are some peripherals that do not strictly adhere

to these naming conventions. Peripherals that have

existed for many years and are present in almost every

device are the exceptions. These exceptions were

necessary to limit the adverse impact of the new

conventions on legacy code. Peripherals that do

adhere to the new convention will include a table in the

registers section indicating the long name prefix for

each peripheral instance. Peripherals that fall into the

exception category will not have this table. These

peripherals include, but are not limited to, the following:

• EUSART

• MSSP

PIC16LF1717TE/MLQTP Datasheet(PDF) 13 Page - Microchip Technology

PIC16LF1717TE/MLQTP Datasheet(HTML) 13 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL