diff --git a/flashchips.c b/flashchips.c
index e290e2f..4e09ab1 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -5587,12 +5587,48 @@
 
 	{
 		.vendor		= "Numonyx",
-		.name		= "N25Q064",
+		.name		= "N25Q064..1E", /* ..1E = 1.8V, uniform 64KB/4KB blocks/sectors */
 		.bustype	= BUS_SPI,
 		.manufacture_id	= ST_ID,
-		.model_id	= ST_N25Q064,
+		.model_id	= ST_N25Q064__1E,
 		.total_size	= 8192,
 		.page_size	= 256,
+		/* supports SFDP */
+		/* OTP: 64B total; read 0x4B, write 0x42 */
+		.feature_bits	= FEATURE_WRSR_WREN | FEATURE_OTP,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 2048 } },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 128} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {8 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		.unlock		= spi_disable_blockprotect,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+		.voltage	= {1700, 2000},
+	},
+
+	{
+		.vendor		= "Numonyx",
+		.name		= "N25Q064..3E", /* ..3E = 3V, uniform 64KB/4KB blocks/sectors */
+		.bustype	= BUS_SPI,
+		.manufacture_id = ST_ID,
+		.model_id	= ST_N25Q064__3E,
+		.total_size	= 8192,
+		.page_size	= 256,
+		/* supports SFDP */
+		/* OTP: 64B total; read 0x4B, write 0x42 */
+		.feature_bits	= FEATURE_WRSR_WREN | FEATURE_OTP,
 		.tested		= TEST_OK_PREW,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
@@ -5612,6 +5648,7 @@
 		.unlock		= spi_disable_blockprotect,
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
+		.voltage	= {2700, 3600},
 	},
 
 	{
diff --git a/flashchips.h b/flashchips.h
index 8e51d35..2115930 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -591,7 +591,8 @@
 #define ST_M29W010B		0x23
 #define ST_M29W040B		0xE3
 #define ST_M29W512B		0x27
-#define ST_N25Q064		0xBA17
+#define ST_N25Q064__3E		0xBA17  /* N25Q064, 3.0V, 64KB/4KB blocks/sectors */
+#define ST_N25Q064__1E		0xBB17  /* N25Q064, 1.8V, 64KB/4KB blocks/sectors */
 
 #define SYNCMOS_MVC_ID		0x40	/* SyncMOS (SM) and Mosel Vitelic Corporation (MVC) */
 #define MVC_V29C51000T		0x00