diff --git a/RTL8218B.md b/RTL8218B.md
index 0418d72a..29ff6267 100644
--- a/RTL8218B.md
+++ b/RTL8218B.md
@@ -190,6 +190,15 @@ Page | Register | Bits | Feature | Documentation
 0x44e | 0x11 | 15:00 | | Some unknown register for fiber jitter on RTL8214FC
 **Page** | **Register** | **Bits** | **Unknown filter register** | **Absolute 0x2310**
 0x462 | 0x10 | 13:12 | OFFSET_CALIBRATION
+**Page** | **Register** | **Bits** | **Unknown analog** | **Absolute 0x2315**
+0x462 | 0x15 | 15:15 | ISTANK_SEL_HS_TG_1
+0x462 | 0x15 | 14:14 | ISTANK_SEL_HS_TG_0
+0x462 | 0x15 | 13:12 | CMU_SEL_CP_TG
+0x462 | 0x15 | 11:10 | CMU_SELPREDIV_TG
+0x462 | 0x15 | 09:08 | CMU_LOOP_DIV4_TG
+0x462 | 0x15 | 07:04 | CMU_ICP_SEL_TG
+0x462 | 0x15 | 03:03 | CMU_SEL_R_TG_3
+0x462 | 0x15 | 02:00 | CMU_SEL_R_TG_2_0
 **Page** | **Register** | **Bits** | **Analog register** | **Absolute 0x2322**
 0x464 | 0x12 | 15:11 | FILTER_OUT0
 0x464 | 0x12 | 10:07 | EQ_SELREG