PIC16LF18854 Datasheet, PDF (320/668 Pages) Microchip Technology – C Compiler Optimized RISC Architecture

PIC16(L)F18856/76
22.0 CONFIGURABLE LOGIC CELL
(CLC)
The Configurable Logic Cell (CLCx) module provides
programmable logic that operates outside the speed
limitations of software execution. The logic cell takes up
to 32 input signals and, through the use of configurable
gates, reduces the 32 inputs to four logic lines that drive
one of eight selectable single-output logic functions.
Input sources are a combination of the following:
• I/O pins
• Internal clocks
• Peripherals
• Register bits
The output can be directed internally to peripherals and
to an output pin.
The CLC modules available are shown in Table 22-1.
TABLE 22-1: AVAILABLE CLC MODULES
Device
CLC1 CLC2 CLC3 CLC4
PIC16(L)F18856/76
●
●
●
●
Note:
The CLC1, CLC2, CLC3 and CLC4 are
four separate module instances of the
same CLC module design. Throughout
this section, the lower case ‘x’ in register
and bit names is a generic reference to
the CLC number (which should be substi-
tuted with 1, 2, 3, or 4 during code devel-
opment). For example, the control register
is generically described in this chapter as
CLCxCON, but the actual device registers
are CLC1CON, CLC2CON, CLC3CON
and CLC4CON. Similarly, the LCxEN bit
represents the LC1EN, LC2EN, LC3EN
and LC4EN bits.
Refer to Figure 22-1 for a simplified diagram showing
signal flow through the CLCx.
Possible configurations include:
• Combinatorial Logic
- AND
- NAND
- AND-OR
- AND-OR-INVERT
- OR-XOR
- OR-XNOR
• Latches
- S-R
- Clocked D with Set and Reset
- Transparent D with Set and Reset
- Clocked J-K with Reset
DS40001824A-page 320
Preliminary
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