M66290AFP datasheet(7/54 Pages) RENESAS

7 / 54 page

USB DEVICE CONTROLLER

M66290AGP/FP

MITSUBISHI <DIGITAL ASSP>

Functional and register descriptions

We explain about Function and register constitution of

M66290A div iding into f our items as f ollows.

(1) Sy stem control

(2) Interrupts

(3) Control transf er/enumeration

(4) Endpoints and FIFO control

(1) System control

CLOCK

Clock of 48MHz is needed f or internal operations

of M66290A.

Built in PLL enables to input external clock of 6/12/

24/48MHz. Selection of it is realized by the XTAL

of "USB Operation Enable Register".

When use external clock of 48MHz, PLL is not

needed, so set to PLL operation disable.

Built in oscillation circuit enables to supply clock

by self oscillation.

RESET

S/W reset by the register set (USBE), diff erent f rom

the hardware reset, keeps the v alue of register of

USB operation enable register, FIFO relational

setting register, and so on.

And in USB reset (when more than 2.5us of SE0 state

is continued on D+, D- terminal), the v alue of register

is kept except f or "Interrupt Status Register 0" and

"USB_Address Register"

As to details of reset state, see each item of register.

D+ pull-up resistor control f unction

To set the register, external TrON output is controlled

and can control the ON/OFF of pull-up resistor

(1.5kohm) on USB D+ line.

And when use this f unction, dev ice state shif ts to Address

state af ter outputs remote wakeup signal, so it is needed

to set up again the dev ice state to Conf igured state.

Change of set up of dev ice state can be done in S/W

control mode.

Remote wakeup signal is a signal to set USB bus to idle

state af ter output K-state of 10ms length.

If this remote wakeup f unction is set up immediately af ter

detected suspend, USB bus idle state is kept f or 2ms and

then shif ts to K state output. (Because USB bus idle state

must be kept f or 5ms minimum until transmit of remote

wakeup signal, on the other hand af ter detect suspend,

USB idle state is continued f or 3ms)

Sequence toggle bit clear f unction

In each endpoint of EP0 to EP5, data PID can be reset

independently and also can appoint PID of DATA0.

By this f unction, management of sequence toggle bit

in transf er af ter reset PID, is done by H/W automatically.

Error inf ormation in isochronous transf er

In isochronous transf er there is not retry f unction of

transmit/receiv e, because the handshake f rom receiv er

to transmitter is not returned not to disturb the time

equiv alent data transf er.

M66290A has enough inf ormation f unction which enables

f irmware to manage incorrect transf er in case of transf er

error occurred in isochronous transf er.

Inf ormation which M66290A can inf orm is, ov er run

error, under run error, receiv ed data error (CRC error,

bit stuff ing error), and f rame number.

Sof tware control mode

In sof tware control mode, it is av ailable to set up (write)

f rom CPU as f ollows, USB_Address register (USB_Addr),

dev ice state register (DVSQ), control transf er stage

Normally , use this mode with OFF.

To set the "USB Operation Enable Register", it can

be set the dev ice to standby state. Oscillation is

halted (clock input halted) by XCKE, PLL operation

is halted by PLLC, and clock supply to USB block

is halted by SCKE.

To prev ent unstable behav ior by unstable clock,

clock supply to USB block must be obey ed the

process, that is, enables clock input by XCKE, wait

until oscillation stabilized, start PLL by PLLC, wait

until oscillation stabilized (less than 1ms), and start

clock supply to USB block by SCKE.

Remote wakeup f unction

When dev ice is in suspended state, outputs remote

wakeup signal and can cancel suspended state to receiv e

resume f rom USB.

Remote wakeup f unction is only eff ectiv e in Suspended

state in which dev ice state shif ts f rom Conf igured state,

so don't use to other dev ice state.

Xin

Xout

M66290A

Xin

Xout

M66290A

clock input

open

(1) In case of crystal oscillation

(2) In case of external clock input

Figure 1. Xin and Xout connections

XTAL

Place the parts as near the terminal as possible

M66290AFP Datasheet(PDF) 7 Page - Renesas Technology Corp

M66290AFP Datasheet(HTML) 7 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54

Datasheet Download

Link URL