From a7ef641f0d28a739cf3083f4519df323d2bae96a Mon Sep 17 00:00:00 2001
From: colin <lianghongkey@gmail.com>
Date: Mon, 7 Feb 2022 13:34:50 +0000
Subject: [PATCH] Refine io level

---
 fpga/blink/blink.lpf | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fpga/blink/blink.lpf b/fpga/blink/blink.lpf
index d470a19..4354bd3 100644
--- a/fpga/blink/blink.lpf
+++ b/fpga/blink/blink.lpf
@@ -4,5 +4,5 @@ FREQUENCY PORT "clk_i" 25 MHZ;
 
 LOCATE COMP "led_o" SITE "U16";
 
-IOBUF PORT "led_o" IO_TYPE=LVCMOS25;
+IOBUF PORT "led_o" IO_TYPE=LVCMOS33;