In NCS v2.6.0, how many hardware TIMER and PPI channels does OpenThread occupy

Question

hello， 
 I need microsecond timer interrupts in my program, so I thought of using the TIMER of the hal library. 
 When I enable CONFIG_NRFX_TIMER0=y in prj.conf, the system starts up with an error. 
 When I enable CONFIG_NRFX_TIMER1=y, the system starts up normally without errors, but timer_event_handler does not execute normally. 
 #define TIMER_INST_IDX 1
static const nrfx_timer_t timer_inst = NRFX_TIMER_INSTANCE(TIMER_INST_IDX);

static void timer_handler(nrf_timer_event_t event_type, void * p_context)
{
 if(event_type == NRF_TIMER_EVENT_COMPARE0)
 {
 LOG_INF("NRF_TIMER_EVENT_COMPARE0");
 ........
 }
}

void timer_init(void)
{
 IRQ_DIRECT_CONNECT(NRFX_IRQ_NUMBER_GET(NRF_TIMER_INST_GET(TIMER_INST_IDX)), IRQ_PRIO_LOWEST,
 NRFX_TIMER_INST_HANDLER_GET(TIMER_INST_IDX), 0);
	
	nrfx_err_t err;
	nrfx_timer_config_t config = NRFX_TIMER_DEFAULT_CONFIG(NRFX_MHZ_TO_HZ(16UL));
	config.bit_width = NRF_TIMER_BIT_WIDTH_32;

	err = nrfx_timer_init(&timer_inst, &config, timer_handler);
	if (err != NRFX_SUCCESS) {
 LOG_ERR("Failed nrfx_timer_init, error: 0x%08X", err);
 return ;
	}
	nrfx_timer_clear(&timer_inst);

	uint32_t time_ms = 500;
	uint32_t desired_ticks = nrfx_timer_ms_to_ticks(&timer_inst, time_ms);

	nrfx_timer_extended_compare(&timer_inst, NRF_TIMER_CC_CHANNEL0, desired_ticks,
 NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true);

	nrfx_timer_enable(&timer_inst);
 NRFX_LOG_INFO("Timer status: %s", nrfx_timer_is_enabled(&timer_inst) ? "enabled" : "disabled");
} 
 
 When I add timer1-okay in the .overlay file, Cmake compilation fails 
 &timer1 {
	status = "okay";
}; 
 
 I don't know what hardware Zephyr and OpenThread occupy, can you explain it? 
 
 Regards,