power pinout for neuron circuit
diff --git a/README.md b/README.md
index 975a35f..29d034f 100644
--- a/README.md
+++ b/README.md
@@ -13,11 +13,11 @@
</p>
#### Pinout
-| node | pad | node | pad |
-|--------|-------------|-----------|-------------|
-| i_bias | mprj_io[13] | v_buff | mprj_io[22] |
-| vad | mprj_io[14] | u_buff | mprj_io[23] |
-| vr | mprj_io[15] | a_buff | mprj_io[24] |
+| node | pad | node | pad | node | pad |
+|--------|-------------|-----------|-------------|-------------|-------------|
+| i_bias | mprj_io[13] | v_buff | mprj_io[22] | vdd | vdda1 |
+| vad | mprj_io[14] | u_buff | mprj_io[23] | vss | vssa1 |
+| vr | mprj_io[15] | a_buff | mprj_io[24] | vdd_aux | vdda2 |
| vk | mprj_io[16] | axon_buff | mprj_io[25] |
| vth | mprj_io[17] | sel | mprj_io[26] |
| vw | mprj_io[18] | v_syn | mprj_io[27] |
