JN517X Datasheet, PDF (38/100 Pages) NXP Semiconductors – Supports multiple network stacks

NXP Semiconductors
JN517x
IEEE802.15.4 Wireless Microcontroller
• Supports 8-bit transfers (MSB or LSB first configurable), with SPISSEL deselected
between each transfer
• Internal FIFO up to 255 bytes for transmit and receive
• Standard SPI-bus mode 0, data is sampled on positive clock edge
• Maskable interrupts for receive FIFO not empty, transmit FIFO empty, receive FIFO fill
level above threshold, transmit FIFO below threshold, transmit FIFO overflow, receive
FIFO underflow, transmit FIFO underflow, receive time-out
• Programmable receive time-out period allows an interrupt to be generated to prompt
the receive FIFO to be read if no further data arrives within the time-out period
9.10 Timers
9.10.1 Peripheral timer/counters
2 general-purpose timer/counter units, Timer0 and Timer1, are available and can be
configured to operate in one of five possible modes:
1. Timer: can generate interrupts from rise and fall counts. Can be gated by external
signal
2. Counter: counts number of transitions of an external event signal. Can use low-high,
high-low or both transitions PWM/Single pulse: outputs a repeating Pulse Width
Modulation signal or a single pulse. Can set period and mark-space ratio
3. Capture: measures times between transitions of an applied signal
4. Delta-Sigma: Return-To-Zero (RTZ) and Non-Return-to-Zero (NRZ) modes
The Timer functionality is as follows:
• Clocked from internal system clock (16 MHz or 32 MHz)
• 5-bit prescaler, divides system clock by 2^prescale as the clock to the timer (prescaler
range is 0 to 16)
• 17-bit counter, 17-bit Rise and Fall (period) registers
• Timer: can generate interrupts OFF Rise and Fall counts. Can be gated by external
signal
• Counter: counts number of transitions on external event signal. Can use low-high,
high-low or both transitions
• PWM/Single pulse: outputs repeating Pulse Width Modulation signal or a single pulse.
Can set period and mark-space ratio
• Capture: measures times between transitions of an applied signal
• Delta-Sigma: Return-To-Zero (RTZ) and Non-Return-to-Zero (NRZ) modes
• Timer usage of external IO can be controlled on a pin by pin basis
6 further timers are also available that support the same functionality but have no counter
or capture mode. These are referred to as PWM timers. Additionally, it is not possible to
gate these four timers with an external signal.
JN517X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2.0 — 8 November 2016
© NXP Semiconductors N.V. 2016. All rights reserved.
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