diff --git a/tests/ports/psoc6/board_ext_hw/multi/pdm_pcm_rx.py b/tests/ports/psoc6/board_ext_hw/multi/pdm_pcm_rx.py
index 95dcf0857c62..c5df153456e9 100644
--- a/tests/ports/psoc6/board_ext_hw/multi/pdm_pcm_rx.py
+++ b/tests/ports/psoc6/board_ext_hw/multi/pdm_pcm_rx.py
@@ -19,7 +19,6 @@
 print("*** PDM_PCM tests - RX ***")
 
 send_signal = Pin(send_signal_to_tx_pin, mode=Pin.OUT, pull=Pin.PULL_DOWN, value=False)
-send_signal.value(0)
 
 
 def generate_exp_seq(data):
@@ -37,6 +36,7 @@ def generate_exp_seq(data):
 rounds = 2
 
 for m in range(rounds):
+    send_signal.value(0)
     exp_seq = generate_exp_seq(exp_data[m])
     if m == 0:
         print("*** Test for data high ***")
@@ -94,7 +94,7 @@ def rx_complete_irq(obj):
     rx_done = True
 
 
-machine.freq(machine.AUDIO_PDM_24_576_000_HZ)
+machine.freq(machine.AUDIO_PDM_22_579_000_HZ)
 pdm_pcm = PDM_PCM(
     0,
     sck=clk_pin,
diff --git a/tests/ports/psoc6/board_ext_hw/multi/pdm_pcm_tx.py b/tests/ports/psoc6/board_ext_hw/multi/pdm_pcm_tx.py
index 58fedd57f5a1..c1fa5aaa61e0 100644
--- a/tests/ports/psoc6/board_ext_hw/multi/pdm_pcm_tx.py
+++ b/tests/ports/psoc6/board_ext_hw/multi/pdm_pcm_tx.py
@@ -15,21 +15,13 @@
     print("SKIP")
     raise SystemExit
 
-start_time = time.time()
-
-sig_val = 1
+sig_val = 0
 test_done = False
 
 
 def signal_irq(event):
     global sig_val
-    sig_val = 0
-
-
-def blocking_delay_ms(delay_ms):
-    start = time.ticks_ms()
-    while time.ticks_diff(time.ticks_ms(), start) < delay_ms:
-        pass
+    sig_val += 1
 
 
 data_out = Pin(data_out_pin, mode=Pin.OUT, pull=Pin.PULL_DOWN, value=False)
@@ -38,12 +30,12 @@ def blocking_delay_ms(delay_ms):
 sync_data.irq(handler=signal_irq, trigger=Pin.IRQ_RISING)
 
 data_out.value(1)
-while test_done == False:
-    while sig_val:
-        pass
-    data_out.value(0)
-    blocking_delay_ms(200000)
-    test_done = True
+while sig_val == 0:
+    pass
+
+data_out.value(0)
+while sig_val == 1:
+    pass
 
 data_out.deinit()
 clk_in.deinit()