diff --git a/components/esp_serial_slave_link/include/essl_spi/esp32c3_defs.h b/components/esp_serial_slave_link/include/essl_spi/esp32c3_defs.h
new file mode 100644
index 0000000000..3dfd4a14b7
--- /dev/null
+++ b/components/esp_serial_slave_link/include/essl_spi/esp32c3_defs.h
@@ -0,0 +1,38 @@
+// Copyright 2010-2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+#pragma once
+
+// NOTE: From the view of master
+#define CMD_HD_WRBUF_REG    0x01
+#define CMD_HD_RDBUF_REG    0x02
+#define CMD_HD_WRDMA_REG    0x03
+#define CMD_HD_RDDMA_REG    0x04
+
+#define CMD_HD_ONEBIT_MODE  0x00
+#define CMD_HD_DOUT_MODE    0x10
+#define CMD_HD_QOUT_MODE    0x20
+#define CMD_HD_DIO_MODE     0x50
+#define CMD_HD_QIO_MODE     0xA0
+
+#define CMD_HD_SEG_END_REG  0x05
+#define CMD_HD_EN_QPI_REG   0x06
+#define CMD_HD_WR_END_REG   0x07
+#define CMD_HD_INT0_REG     0x08
+#define CMD_HD_INT1_REG     0x09
+#define CMD_HD_INT2_REG     0x0A
+#define CMD_HD_EX_QPI_REG   0xDD
+
+#define SPI_SLAVE_HD_BUFFER_SIZE 64