diff --git a/lib/CMT2300a/cmt_spi3.c b/lib/CMT2300a/cmt_spi3.c
index 604706a..80d3103 100644
--- a/lib/CMT2300a/cmt_spi3.c
+++ b/lib/CMT2300a/cmt_spi3.c
@@ -61,8 +61,6 @@ void cmt_spi3_init(const int8_t pin_sdio, const int8_t pin_clk, const int8_t pin
         .post_cb = NULL,
     };
     ESP_ERROR_CHECK(spi_bus_add_device(SPI_CMT, &devcfg2, &spi_fifo));
-
-    delay(100);
 }
 
 void cmt_spi3_write(const uint8_t addr, const uint8_t data)
@@ -77,7 +75,6 @@ void cmt_spi3_write(const uint8_t addr, const uint8_t data)
     SPI_PARAM_LOCK();
     ESP_ERROR_CHECK(spi_device_polling_transmit(spi_reg, &t));
     SPI_PARAM_UNLOCK();
-    delayMicroseconds(100);
 }
 
 uint8_t cmt_spi3_read(const uint8_t addr)
@@ -93,7 +90,6 @@ uint8_t cmt_spi3_read(const uint8_t addr)
     SPI_PARAM_LOCK();
     ESP_ERROR_CHECK(spi_device_polling_transmit(spi_reg, &t));
     SPI_PARAM_UNLOCK();
-    delayMicroseconds(100);
     return data;
 }
 
@@ -108,7 +104,6 @@ void cmt_spi3_write_fifo(const uint8_t* buf, const uint16_t len)
     for (uint8_t i = 0; i < len; i++) {
         t.tx_buffer = buf + i;
         ESP_ERROR_CHECK(spi_device_polling_transmit(spi_fifo, &t));
-        delayMicroseconds(4); // > 4 us
     }
     SPI_PARAM_UNLOCK();
 }
@@ -124,7 +119,6 @@ void cmt_spi3_read_fifo(uint8_t* buf, const uint16_t len)
     for (uint8_t i = 0; i < len; i++) {
         t.rx_buffer = buf + i;
         ESP_ERROR_CHECK(spi_device_polling_transmit(spi_fifo, &t));
-        delayMicroseconds(4); // > 4 us
     }
     SPI_PARAM_UNLOCK();
 }