PXD20RM Datasheet, PDF (57/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

• The 16 MHz internal RC oscillator supports low speed code execution and clocking of peripherals
when it is selected as the system clock and can also be used as the PLL input clock source to
provide fast start-up without the external oscillator delay
• The device includes an internal voltage regulator that includes the following features:
— Regulates input to generate all internal supplies
— Manages power gating
— External ballast transistor for high power regulator
— Low-Power and Ultra-Low-Power regulators support operation when in STOP and STANDBY
modes, respectively, to minimize power consumption
— Startup on-chip regulators in <350 µs for rapid exit of STOP and STANDBY modes
— Low voltage detection on main supply and 1.2 V regulated supplies.
1.5.2 e200z4d core
The e200z4d Power Architecture core provides the following features:
• Dual issue, 32-bit Power Architecture Book E compliant CPU
• Implements the VLE APU for reduced code footprint
• In-order execution and retirement
• Precise exception handling
• Branch processing unit
— Dedicated branch address calculation adder
— Branch target prefetching using 8-entry BTB
• Supports independent instruction and data accesses to different memory subsystems, such as
SRAM and Flash memory via independent Instruction and Data BIUs.
• Load/store unit
— 2 cycle load latency
— Fully pipelined
— Big and Little endian support
— Misaligned access support
• 64-bit General Purpose Register file
• Dual AHB 2.v6 64-bit System buses
• Memory Management Unit (MMU) with 16-entry fully-associative TLB and multiple page size
support
• 4 KB, 2/4-Way Set Associative Instruction Cache
• Signal Processing Extension (SPE1.1) APU supporting SIMD fixed-point operations using the
64-bit General Purpose Register file.
• Embedded Floating-Point (EFP2) APU supporting scalar and vector SIMD single-precision
floating-point operations, using the 64-bit General Purpose Register file.
• Nexus Class 3 real-time Development Unit
PXD20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor
1-9
Preliminary—Subject to Change Without Notice