ML60851D Просмотр технического описания (PDF) - Oki Electric Industry

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ML60851D

USB Device Controller

Oki Electric Industry 

1Semiconductor

PEDL60851D-01

ML60851D

Configuration state:

When the local MPU asserts the configuration bits EP1CON, EP2CON, or EP3CON in response to a

SET_CONFIGURATION request from the host computer when this IC is in the address state, by writing a

“1” in this bit also, if necessary, at that time, it is possible to give an indication that the ML60851D has

entered the configuration state. Since the content of this bit does not affect the operation of the ML60851D,

there is no need to write in this bit if it will not be read out.

Remarks:

When all these three states are “1”, it means that this IC is normally operating. However, since these bits do

not affect the operation of the ML60851D, there is no need to write in these bits if they will not be read out.

Suspend state:

When the idle condition continues for more than 3ms in the USB bus, the ML60851D automatically asserts

this bit thereby indicating that it is going into the suspend state. At the same time, bit D6 of the interrupt

status register INTSTAT is asserted and the INTR pin is asserted. With this, the local MCU can suppress

the current consumption.

This bit is deasserted when the EOP of any type of packet is received.

Remote wake-up:

The ML60851D is in the suspend state, the remote wake-up function is activated when the local MCU

asserts this bit. When this bit is written while 5ms have not yet elapsed in the idle condition, the remote

wake-up signal is output after waiting for the idle condition to continue for the full 5ms period. Further,

when this bit is written after the idle condition has persisted for 5ms or more, the remote wake-up signal is

output immediately after this bit is written. This bit is deasserted automatically when the suspend state is

released by receiving the resume instruction over the USB bus.

USB bus reset status clear:

When the ML60851D is in the USB bus reset interrupt state (bit D5 of the interrupt status register, that is

the USB bus reset interrupt status bit is “1” and the INTR pin is asserted), it is possible to clear the interrupt

status by writing a “1” in this bit. (This makes the USB bus reset interrupt status bit “0” and deassertes

INTR.) Although this bit can be read out, the read out value will always be “0”.

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