NUTINY-SDK-M0516 Nuvoton Technology Corporation of America, NUTINY-SDK-M0516 Datasheet - Page 187

• Manufacturer Part Number: NUTINY-SDK-M0516
• Description: BOARD EVAL NUMICRO M051 SERIES
• Manufacturer: Nuvoton Technology Corporation of America
• Series: NuMicro M051™r
• Type: MCUr

Specifications of NUTINY-SDK-M0516

• Contents: Board, Cable
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: M051™ Series, M052/M054/M058/M0516

6.6.2
6.6.2.1 PWM function features:
6.6.2.2 Capture Function Features:
NuMicro M051
programmable
CCR0.CFL_IE0[2]] (Falling latch Interrupt enable) to decide the condition of interrupt occur.
Capture channel 1 has the same feature by setting CCR0.CRL_IE1[17] and CCR0.CFL_IE1[18].
And capture channel 0 to channel 3 on each group have the same feature by setting the
corresponding control bits in CCR0 and CCR2. For each group, whenever Capture issues
Interrupt 0/1/2/3, the PWM counter 0/1/2/3 will be reload at this moment.
The maximum captured frequency that PWM can capture is confined by the capture interrupt
latency. When capture interrupt occurred, software will do at least three steps, they are: Read
PIIRx to get interrupt source and Read PWM_CRLx/PWM_CFLx(x=0 and 3) to get capture value
and finally write 1 to clear PIIRx. If interrupt latency will take time T0 to finish, the capture signal
mustn’t transition during this interval (T0). In this case, the maximum capture frequency will be
1/T0. For example:
HCLK = 50 MHz, PWM_CLK = 25 MHz, Interrupt latency is 900 ns
So the maximum capture frequency will is 1/900ns ≈ 1000 kHz
PWM group has two PWM generators. Each PWM generator supports one 8-bit prescaler, one
clock divider, two PWM-timers (down counter), one dead-zone generator and two PWM outputs.
Features
Up to 16 bits resolution
PWM Interrupt request synchronized with PWM period
One-shot or Auto-reload mode PWM
Up to 2 PWM group (PWMA/PWMB) to support 8 PWM channels
Timing control logic shared with PWM Generators
8 capture input channels shared with 8 PWM output channels
Each channel supports one rising latch register (CRLR), one falling latch register (CFLR)
and Capture interrupt flag (CAPIFx)
by
setting
™
Series Technical Reference Manual
CCR0.CRL_IE0[1]
- 187 -
(Rising
Publication Release Date: Sept 14, 2010
latch
Interrupt
enable)
Revision V1.2
and