Microchip Technology TDGL019 Data Sheet

© 2011-2014 Microchip Technology Inc.

DS60001168F-page 31

The MIPS32

®

 M4K

®

 Processor Core is the heart of the

PIC32MX1XX/2XX family processor. The CPU fetches

instructions, decodes each instruction, fetches source

operands, executes each instruction and writes the

results of instruction execution to the destinations.

• 5-stage pipeline
• 32-bit address and data paths
• MIPS32 Enhanced Architecture (Release 2)

- Multiply-accumulate and multiply-subtract 

instructions 

- Targeted multiply instruction
- Zero/One detect instructions
- WAIT instruction
- Conditional move instructions (MOVN, MOVZ)
- Vectored interrupts
- Programmable exception vector base
- Atomic interrupt enable/disable
- Bit field manipulation instructions

• MIPS16e

®

 code compression

- 16-bit encoding of 32-bit instructions to improve 

code density

- Special PC-relative instructions for efficient 

loading of addresses and constants

- SAVE and RESTORE macro instructions for setting 

up and tearing down stack frames within 

subroutines

- Improved support for handling 8 and 16-bit data 

types

• Simple Fixed Mapping Translation (FMT)

mechanism

• Simple dual bus interface

- Independent 32-bit address and data buses
- Transactions can be aborted to improve interrupt 

latency

• Autonomous multiply/divide unit

- Maximum issue rate of one 32x16 multiply per 

clock

- Maximum issue rate of one 32x32 multiply every 

other clock

- Early-in iterative divide. Minimum 11 and 

maximum 33 clock latency (dividend (rs) sign 

extension-dependent)

• Power control

- Minimum frequency: 0 MHz
- Low-Power mode (triggered by WAIT instruction)
- Extensive use of local gated clocks

• EJTAG debug and instruction trace

- Support for single stepping
- Virtual instruction and data address/value
- Breakpoints

 

This data sheet summarizes the features

of the PIC32MX1XX/2XX family of

devices. It is not intended to be a

comprehensive reference source. To

complement the information in this data

sheet, refer to Section 2. “CPU”

(DS60001113) in the “PIC32 Family
Reference Manual”

, which is available

from the Microchip web site

(

). Resources

for the MIPS32

®

 M4K

®

 Processor Core

are available at: 

.

Some registers and associated bits

described in this section may not be

available on all devices. Refer to

 in

this data sheet for device-specific register

and bit information.

MDU

Execution Core
(RF/ALU/Shift)

FMT

TAP

EJTAG

Bus Interface

Power

Management

System

Co-processor

Off-chip Debug Interface

Bus Matrix

Dual Bus Interface