Gmii Pins (R-In32M3-Cl Only); Figure 8.1 Connection Image Of R-In32M3-Cl And Gigabit Ethernet Phy - Renesas R-IN32M3 Series User Manual

R-IN32M3 Series: Board design edition
8.

GMII Pins (R-IN32M3-CL Only)

Figure 8.1 shows a connection image of R-IN32M3-CL and Gigabit Ethernet PHY.
The value of damping resistors should be 33Ω within a tolerance of 5%, and the damping resistors should be put in the
nearest point of the R-IN32M3-CL. In addition, wires of target pins (which is GTXC, TXDx, TXEN and TXER) are
recommended to be short and equal-length.
ETH_MDC
ETH_MDIO
ETHm_TXC
ETHm_GTXC
ETHm_TXDx
ETHm_TXEN
ETHm_TXER
ETHm_RXC
ETHm_RXDx
ETHm_RXDV
ETHm_RXER
ETHm_COL
ETHm_CRS
R-IN32M3-CL

Figure 8.1 Connection Image of R-IN32M3-CL and Gigabit Ethernet PHY

Remark. m = 0, 1, x = 0 to 7
R18UZ0021EJ0400
Dec. 28, 2018
VDD33 (3.3 V)
4.7kΩ
Wires a re reco mmen ded to be short
and eq ual-leng th.
GND shiel d
GND shiel d
Damping resistor: 33Ω±5%
GND shiel d
8. GMII Pins (R-IN32M3-CL Only)
MDC
MDIO
TX_CLK
GTX_CLK
TXDx*
RJ45
TX_EN
connector
TX_ER
RX_CLK
RXDx*
RX_DV
RX_ER
COL
CRS
Gig abit Ethern et PHY
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