diff --git a/tools/binman/btool/openssl.py b/tools/binman/btool/openssl.py
index aad3b61..7ee2683 100644
--- a/tools/binman/btool/openssl.py
+++ b/tools/binman/btool/openssl.py
@@ -155,6 +155,7 @@
             C, ST, L, O, OU, CN and emailAddress
             cert_type (int): Certification type
             bootcore (int): Booting core
+            bootcore_opts(int): Booting core option, lockstep (0) or split (2) mode
             load_addr (int): Load address of image
             sha (int): Hash function
 
@@ -225,7 +226,7 @@
                   imagesize_sbl, hashval_sbl, load_addr_sysfw, imagesize_sysfw,
                   hashval_sysfw, load_addr_sysfw_data, imagesize_sysfw_data,
                   hashval_sysfw_data, sysfw_inner_cert_ext_boot_block,
-                  dm_data_ext_boot_block):
+                  dm_data_ext_boot_block, bootcore_opts):
         """Create a certificate
 
         Args:
@@ -241,6 +242,7 @@
             bootcore (int): Booting core
             load_addr (int): Load address of image
             sha (int): Hash function
+            bootcore_opts (int): Booting core option, lockstep (0) or split (2) mode
 
         Returns:
             str: Tool output
@@ -285,7 +287,7 @@
 [sbl]
 compType = INTEGER:1
 bootCore = INTEGER:16
-compOpts = INTEGER:0
+compOpts = INTEGER:{bootcore_opts}
 destAddr = FORMAT:HEX,OCT:{load_addr:08x}
 compSize = INTEGER:{imagesize_sbl}
 shaType  = OID:{sha_type}
diff --git a/tools/binman/entries.rst b/tools/binman/entries.rst
index e7b4e93..2402adb 100644
--- a/tools/binman/entries.rst
+++ b/tools/binman/entries.rst
@@ -1944,6 +1944,7 @@
     - core: core on which bootloader runs, valid cores are 'secure' and 'public'
     - content: phandle of SPL in case of legacy bootflow or phandles of component binaries
       in case of combined bootflow
+    - core-opts (optional): lockstep (0) or split (2) mode set to 0 by default
 
 The following properties are only for generating a combined bootflow binary:
     - sysfw-inner-cert: boolean if binary contains sysfw inner certificate
diff --git a/tools/binman/etype/ti_secure_rom.py b/tools/binman/etype/ti_secure_rom.py
index 9a7ac9e..f6fc3f9 100644
--- a/tools/binman/etype/ti_secure_rom.py
+++ b/tools/binman/etype/ti_secure_rom.py
@@ -32,6 +32,7 @@
         - core: core on which bootloader runs, valid cores are 'secure' and 'public'
         - content: phandle of SPL in case of legacy bootflow or phandles of component binaries
           in case of combined bootflow
+        - core-opts (optional): lockstep (0) or split (2) mode set to 0 by default
 
     The following properties are only for generating a combined bootflow binary:
         - sysfw-inner-cert: boolean if binary contains sysfw inner certificate
@@ -69,6 +70,7 @@
         self.sw_rev = fdt_util.GetInt(self._node, 'sw-rev', 1)
         self.sha = fdt_util.GetInt(self._node, 'sha', 512)
         self.core = fdt_util.GetString(self._node, 'core', 'secure')
+        self.bootcore_opts = fdt_util.GetInt(self._node, 'core-opts')
         self.key_fname = self.GetEntryArgsOrProps([
             EntryArg('keyfile', str)], required=True)[0]
         if self.combined:
@@ -97,17 +99,19 @@
             bytes content of the entry, which is the certificate binary for the
                 provided data
         """
+        if self.bootcore_opts is None:
+            self.bootcore_opts = 0
+
         if self.core == 'secure':
             if self.countersign:
                 self.cert_type = 3
             else:
                 self.cert_type = 2
             self.bootcore = 0
-            self.bootcore_opts = 32
         else:
             self.cert_type = 1
             self.bootcore = 16
-            self.bootcore_opts = 0
+
         return super().GetCertificate(required=required, type='rom')
 
     def CombinedGetCertificate(self, required):
@@ -126,6 +130,9 @@
         self.num_comps = 3
         self.sha_type = SHA_OIDS[self.sha]
 
+        if self.bootcore_opts is None:
+            self.bootcore_opts = 0
+
         # sbl
         self.content = fdt_util.GetPhandleList(self._node, 'content-sbl')
         input_data_sbl = self.GetContents(required)
diff --git a/tools/binman/etype/x509_cert.py b/tools/binman/etype/x509_cert.py
index d028cfe..fc0bb12 100644
--- a/tools/binman/etype/x509_cert.py
+++ b/tools/binman/etype/x509_cert.py
@@ -136,7 +136,8 @@
                 imagesize_sysfw_data=self.imagesize_sysfw_data,
                 hashval_sysfw_data=self.hashval_sysfw_data,
                 sysfw_inner_cert_ext_boot_block=self.sysfw_inner_cert_ext_boot_block,
-                dm_data_ext_boot_block=self.dm_data_ext_boot_block
+                dm_data_ext_boot_block=self.dm_data_ext_boot_block,
+                bootcore_opts=self.bootcore_opts
             )
         if stdout is not None:
             data = tools.read_file(output_fname)
diff --git a/tools/binman/test/297_ti_secure_rom.dts b/tools/binman/test/297_ti_secure_rom.dts
index d131376..1a3eca9 100644
--- a/tools/binman/test/297_ti_secure_rom.dts
+++ b/tools/binman/test/297_ti_secure_rom.dts
@@ -9,6 +9,7 @@
 	binman {
 		ti-secure-rom {
 			content = <&unsecure_binary>;
+			core-opts = <2>;
 		};
 		unsecure_binary: blob-ext {
 			filename = "ti_unsecure.bin";