NXP Semiconductors MKW01Z128, Reference Manual, Page: 38 / 884

MKW01xxRM Reference Manual, Rev. 3, 04/2016
Freescale Semiconductor, Inc. 4-1
Chapter 4
System Considerations
4.1 Introduction
The MKW01Z128 is the embodiment of a sub-1 GHz wireless node in a single SiP package. All control
of the node is done through the in-package Kinetis KL26 48 MHz processor, and all MCU peripherals,
MCU GPIO, transceiver functionality, and transceiver GPIO are manipulated by the processor. The MCU
GPIO and MCU peripherals are accessed as ports from the MCU internal bus and can be programmed
directly.
Communication to the transceiver is through the common SPI0 bus and several MCU GPIO lines. Primary
interface with the transceiver is through the SPI command structure that allows reading/writing registers
and provides initialization of parameters, reading of status, and control of transceiver operation. The
transceiver also has two status signals tied to MCU GPIO internally and requires several others to be tied
externally.
This chapter presents information addressing application and operation of the node from a system level.
The areas considered here are also covered in greater detail in the following sections of the book. The book
is organized such that the first three chapters present the top-level view of the MKW01Z128 device and
the following chapters present individual functions in detailed descriptions.
4.2 Power connections
The MKW01Z128 power connections at the SiP level are listed in Table 4-1 .
Table 4-1. Power pin descriptions
Pin # Pin Name Type Description Functionality
3 VSSA Power Input MCU ADC Ground Connect to ground
4 VSS Power Input MCU Ground Connect to ground
19 VDD Power Input MCU VDD Connect to MKW01Z128 VDD
supply
20 VSS Power Input MCU Ground Connect to ground
35 VBAT2 Power Input Transceiver VDD Connect to MKW01Z128 VDD
supply
36 GND/SCAN Power Input Transceiver Ground Connect to ground
38 GND_PA2 (RF) Power Input Transceiver RF Ground Connect to ground
40 GND_PA1 (RF) Power Input Transceiver RF Ground Connect to ground