For external terminal treatment of Vybrid

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For external terminal treatment of Vybrid

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takashitakahash
Contributor III

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

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

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.

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jiri-b36968
NXP Employee
NXP Employee

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.8pastedImage_3.png

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

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jiri-b36968
NXP Employee
NXP Employee

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.8pastedImage_3.png

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

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