diff --git a/emmc.pio b/emmc.pio
index ab36db3..2e530c8 100644
--- a/emmc.pio
+++ b/emmc.pio
@@ -58,11 +58,10 @@ read_loop:
 .program glitch_dat_waiter
 .wrap_target
     mov x, y    ; data length pre-loaded counter (512 + 16 - 1) * 8
-wait_for_zero_filtered:
-    jmp pin, wait_for_zero_filtered
-    jmp pin, wait_for_zero_filtered
-    jmp pin, wait_for_zero_filtered
+    wait 0 pin, 0
 wait_for_data_pack:
+    wait 0 pin, 30
+    wait 1 pin, 30
     jmp x-- wait_for_data_pack
     irq clear 1 ; 'data transfer done' trigger
 .wrap