diff --git a/atusb/fw/board.c b/atusb/fw/board.c
index 9add5e0..7e1bd98 100644
--- a/atusb/fw/board.c
+++ b/atusb/fw/board.c
@@ -96,6 +96,13 @@ uint8_t read_irq(void)
 }
 
 
+void slp_tr(void)
+{
+	SET(SLP_TR);
+	CLR(SLP_TR);
+}
+
+
 void led(int on)
 {
 	if (on)
diff --git a/atusb/fw/board.h b/atusb/fw/board.h
index 0e5dbfe..c5e21e8 100644
--- a/atusb/fw/board.h
+++ b/atusb/fw/board.h
@@ -70,6 +70,7 @@ extern uint8_t board_sernum[42];
 void reset_rf(void);
 void reset_cpu(void);
 uint8_t read_irq(void);
+void slp_tr(void);
 
 void led(int on);
 void panic(void);
diff --git a/atusb/fw/ep0.c b/atusb/fw/ep0.c
index 2e5d895..81c2a3f 100644
--- a/atusb/fw/ep0.c
+++ b/atusb/fw/ep0.c
@@ -123,6 +123,11 @@ static int my_setup(const struct setup_request *setup)
 		usb_send(&eps[0], buf, 3, NULL, NULL);
 		return 1;
 
+	case ATUSB_TO_DEV(ATUSB_SLP_TR):
+		debug("ATUSB_SLP_TR\n");
+		slp_tr();
+		return 1;
+
 	case ATUSB_TO_DEV(ATUSB_REG_WRITE):
 		debug("ATUSB_REG_WRITE\n");
 		spi_begin();
diff --git a/atusb/fw/include/atusb/ep0.h b/atusb/fw/include/atusb/ep0.h
index d887762..00746e1 100644
--- a/atusb/fw/include/atusb/ep0.h
+++ b/atusb/fw/include/atusb/ep0.h
@@ -26,6 +26,7 @@
  * host->	ATUSB_TEST		-		-	0
  * ->host	ATUSB_TIMER		-		-	#bytes (6)
  * ->host	ATUSB_GPIO		dir+data	mask+p#	3
+ * host->	ATUSB_SLP_TR		-		-	0
  *
  * host->	ATUSB_REG_WRITE		value		addr	0
  * ->host	ATUSB_REG_READ		-		addr	1
@@ -74,6 +75,7 @@ enum atspi_requests {
 	ATUSB_TEST,			/* atusb-sil only */
 	ATUSB_TIMER,
 	ATUSB_GPIO,
+	ATUSB_SLP_TR,
 	ATUSB_REG_WRITE			= 0x20,	/* transceiver group */
 	ATUSB_REG_READ,
 	ATUSB_BUF_WRITE,