Espressif ESP32 Technical Reference Manual page 282

10 Ethernet Media Access Controller (MAC)
31 30 29
0 0 0x00
ADDRESS_ENABLE4 When this bit is set, the address filter module uses the fifth MAC address for
perfect filtering. When this bit is reset, the address filter module ignores the address for filtering.
(R/W)
SOURCE_ADDRESS4 When this bit is set, the EMACADDR4[47:0] is used to compare with the SA
fields of the received frame. When this bit is reset, the EMACADDR4[47:0] is used to compare
with the DA fields of the received frame. (R/W)
MASK_BYTE_CONTROL4 These bits are mask control bits for comparison of each of the
EMACADDR4 bytes. When set high, the MAC does not compare the corresponding byte of
received DA or SA with the contents of EMACADDR4 registers. Each bit controls the masking of
the bytes as follows:
• Bit[29]: EMACADDR4 High [15:8].
• Bit[28]: EMACADDR4 High [7:0].
• Bit[27]: EMACADDR4 Low [31:24].
• Bit[24]: EMACADDR4 Low [7:0].
You can filter a group of addresses (known as group address filtering) by masking one or more
bytes of the address. (R/W)
MAC_ADDRESS4_HI This field contains the upper 16 bits, Bits[47:32] of the fifth 6-byte MAC ad-
dress. (R/W)
31
EMACADDR4LOW_REG This field contains the lower 32 bits of the fifth 6-byte MAC address. The
content of this field is undefined, so the register needs to be configured after the initialization
process. (R/W)
Espressif Systems
Register 10.35. EMACADDR4HIGH_REG (0x1060)
24 23
0 0 0 0 0 0 0
Register 10.36. EMACADDR4LOW_REG (0x1064)
0x0FFFFFFFF
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16 15
0 0x0FFFF
282
0
Reset
0
Reset
ESP32 TRM (Version 5.2)