M66290AFP datasheet(30/54 Pages) RENESAS

30 / 54 page

USB DEVICE CONTROLLER

M66290AGP/FP

MITSUBISHI <DIGITAL ASSP>

Construction of endpoint (EP1 to EP5) FIFO

Transfer type

EPi_TYP[1:0]

Can be set to Bulk,

Interrupt, isochronous

transfer.

Transfer direction

EPi_DIR

Can be set to IN/OUT

Double buffer

(Toggle buffer)

EPi_DBLB

Can be set

Continuous

transmit/receive

EPi_RWMD

Can be set

(Effective in bulk transfer)

Buffer size

EPi_Buf_siz[3:0]

Can be set

(Up to 1024bytes by

a unit of 64bytes)

Response PID

EPi_PID[1:0]

Can be set to

NAK, STALL, and

BUF(buffer control).

DMA transfer

EPi_DMAE

Can be set

Receive data

read and abandon

mode

EPi_ACLR

Can be set

Max packet size

EPi_MXPS[9:0]

Can be set

( 0 to 1023bytes)

EP1 to EP5

Examples of endpoint FIFO setting

FIFO

number

Memory

address

Endpoint setting

00h to

03h

000h to

0FFh

EP0:Control write transfer

Buffer size:256Bytes

Control write continuous receive

mode(CTRW)

FIFO area:256Bytes(4 blocks)

04h to

07h

100h to

1FFh

EP0:Control read transfer

Buffer size:256Bytes

Control read continuous transmit

mode(CTRR)

FIFO area:256Bytes(4 blocks)

08h

200h to

23Fh

EP2:Interrupt transfer(IN)

Buffer size:64Bytes

FIFO area:64Bytes(1 block)

09h

240h to

27Fh

EP4:Interrupt transfer(OUT)

Buffer size:64Bytes

FIFO area:64Bytes(1 block)

0Ah to

0Bh

280h to

2FFh

EP3:Bulk transfer(IN)

Buffer size:64Bytes

Double buffer constitution(DBLB)

FIFO area:128Bytes(2 blocks)

0Ch to

0Fh

300h to

3FFh

Not used:256Bytes(4 blocks)

10h to

2Fh

400h to

BFFh

EP1:Bulk transfer(OUT)

Buffer size:1024Bytes

Double buffer constitution(DBLB)

Continuous receive mode(RWMD)

FIFO area:2kBytes(32 blocks)

(4) Endpoint and FIFO control

Except f or EP0 f or control transf er, M66290A can set

f iv e endpoints as EP1 to EP5.

Each of these f iv e endpoints (EP1 to EP5) can be set to

bulk, interrupt, and isochronous transf er. And y et,

another constitution can conf igurated independently.

Below are the constitutions to be realized.

Built-in FIFO f or endpoint buff er is 3kBy tes totally of its

memory c apacity . This FIFO of 3kBy tes can div ided

into each endpoint of EP0 to EP5 and to each endpoint,

can assign up to 1024By tes (max) by a unit of 64By tes.

Buff er size of each endpoint must be set to ov er the

capacity which is set in maximum buff er size.

In the buff er size, which is set, by tes of m aximum

packet size is used f or v alid. (If set the buff er size to

128By tes to the endpoint which maximum packet size

is set to 64By tes, 64By tes are v alid)

We show setting examples to each of these buff er of

EP0 to EP5 below, and next explain about continuous

transmit and receiv e f unction, FIFO control, DMA

transf er, and double buff er.

Continuous transfer function

Continuous transf er f unction is to transmit/receiv e data

which extend plural transaction without occurring interrupt

to CPU.

For EP1 to EP5, this f unction is eff ectiv e when transf er

ty pe is bulk transf er.

In each endpoint, when continuous transf er mode is set,

it can transf er data up to the buff er size which is set to

the endpoint without occurring interrupt to CPU.

To use with double buff er constitution, 1kBy tes x2

maximum of buff ering is realized.

Continuous receiv e mode can receiv e data packet

continuously up to the buff er size which is set, or until

receiv es short packet. If the data to be receiv ed is data

packet of m ax packet size, it can receiv e continuously

up to the buff er size without occurring interrupt to CPU,

and if the data is data packet (max packet size) which is

less than buff er size, interrupt to CPU is not occurred.

In bulk transf er, when set max packet size as 64By tes,

buff er size as 1024By tes, and FIFO constitution as

double buff er, when receiv ed data of m ax packet size

as 16 times (1024By tes), it became buff er redried

enable) and urge to CPU by interrupt to read receiv ed

data. When receiv ed short packet, ends the continuous

receiv e and buff er became redried enable).

Continuous transmit mode can transmit data packet

continuously up to buff er size which is set. Short packet

transmit can be done to set IVAL f lag. And it is needed

to set IVAL f lag to transmit a multiple data of m aximum

packet size which is less than buff er size.

By set Null data transmit addition mode, when write a

multiple data of max packet size into buff er and

transmit, Null data can be transmitted automatically

af ter the last packet is transmitted .

M66290AFP Datasheet(PDF) 30 Page - Renesas Technology Corp

M66290AFP Datasheet(HTML) 30 Page - Renesas Technology Corp

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