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 | Mux_mode | Internal | External |
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.
Solved! Go to 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
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