For external terminal treatment of Vybrid

[takashitakahash]

Hi community.

Our customer has below questions.

Ethernet is unused for a customer circuits.

Attachment circuit diagram of  "U8 (RMII_XINT /) RCON22" only pull up (10Kohm), expect register is open.

GPIO set in the register setting of soft ware.

The following is the question.

The description of the "RMII_MDIO" of "This signal is an input after reset."

(Reference Manual Rev 7 P1919 42.3 Chapter)

If the terminal to Open "RMII_MDIO" is

① By erroneous determination, or it will not fall into a mode such GP can not start?

② This terminal is, What PULLUP / DOWN is not so MUST?

function	port	IOMUX config	Mux_mode	Internal   pull	External   pull
RMII_CLKIN	PATA6	0X00000060	GPIO	100K	none
RMII1_TXD1	PTC15	0X00000060	GPIO	100K	none
RMII1_TXD0	PTC16	0X00000060	GPIO	100K	none
RMII1_TXEN	PTC17	0X00000060	GPIO	100K	none
RMII1_RXD1	PTC12	0X00000060	GPIO	100K	none
RMII1_RXD0	PTC13	0X00000060	GPIO	100K	none
RMII1_CRS_DV	PTC11	0X00000060	GPIO	100K	none
RMII1_RXER	PTC14	0X00000060	GPIO	100K	none
RMII1_MDC	PTC9	NA
RMII1MDIO	PTC10	0X00000060	GPIO	100K	none
MRII1_XINT/RCON22	RCON22	0X00300061	GPIO	10K
RMII1_XREST	PTB28	0X00000060	GPIO	100K	none

Thanks,

Best.

[jiri-b36968 · Accepted solution]

Hello Takahashi-san,

Do you need to know how to handle RCON22 and RMII1_MDIO pins when RMII1 is not used?

If yes then:

RCON22 pin (PTB27) is not related to RMII1. Maybe they use it is interrupt input.

PTB27 pin is set to RCON22 (mux mode 0b011) on reset -> BOOT_CFG3[6]. Which is BT_MMU_DISABLE. We use pull down so MMU is enabled.

Table 7-11 RM rev.8

Pin PTC0 is set to GPIO by reset. It can be set to RMII1_MDIO in IOMUX. Pin is set as input without pull-up. If RMII1 is not used then pull is not necessary.

/Jiri