M66596FP datasheet(45/131 Pages) RENESAS

45 / 131 page

M66596FP/WG

rev .1.00

2006.3.14

page 45 of 127

Pipe configuration register [PIPECFG]

<Address: 66H>

TYPE

BFRE

DBLB CNTMD SHTNAK

DIR

EPNUM

Bit

Name

Function

S/W

H/W

Note

15-14 TYPE

Transfer type

00: Pipe use disabled

01: Bulk transfer

10: Interrupt transfer

11: Isochronous transfer

R/W

3.3

*2)

13-11 Nothing is placed here. These should be fixed at “0”.

BFRE

BRDY interrupt operation specified

0: BRDY interrupt upon sending or receiving of

data

1: BRDY interrupt upon reading of data

R/W

3.4.3.6

*3)

DBLB

Double buffer mode

0: Single buffer

1: Double buffer

R/W

3.4.1.5

*4)

CNTMD

Continuous transfer mode

0: Non-continuous transfer mode

1: Continuous transfer mode

R/W

3.4.1.6

*5)

SHTNAK

Pipe disabled at end of transfer

0: Pipe continued at end of transfer

1: Pipe disabled at end of transfer

R/W

3.3

6-5 Nothing is placed here. These should be fixed at “0”.

DIR

Transfer direction

0: Receiving (OUT transfer)

1: Sending (IN transfer)

R/W

3-0 EPNUM

End point number

Specifies the end point number for the pertinent

pipe

R/W

3.3

<<Notes>>

*2) By the pipe number selected in the PIPESEL bit of a PIPESEL register, the value can be set as follows.

When using PIPE1-5, this bit can select "TYPE=00", "TYPE=01", or "TYPE=11".

When using PIPE6-7, this bit should be set "TYPE=10".

*3) If "BFRE=1” is set, BRDY interrupts are not generated when the buffer is set to the data writing direction.

*4) The DBLB bit is valid when PIPE1-5 are selected.

The procedure to change the DBLB bit for a PIPE is as following;

(a) Single buffer to double buffer (“DBLB=0” to “DBLB=”1”);

Set the PID bit to “NAK” for the pertinent pipe

→ “ACLRM=1” → (wait at least 100ns) → “ACLRM=0”

→ “DBLB=”1” → Set the PID bit to “BUF” for the pipe

(b) Double buffer to singlee buffer (“DBLB=1” to “DBLB=”0”);

Set the PID bit to “NAK” for the pertinent pipe

→ “DBLB=”0” → “ACLRM=1” → (wait at least 100ns) →

“ACLRM=0”

→ Set the PID bit to “BUF” for the pipe

*5) The CNTMD bit is valid when bulk transfer (“TYPE=01”) is selected using PIPE1-5. “CNTMD=1” should not be

set when isochronous transfer has been selected (“TYPE=11”).

The CNTMD bit should not be set “1” for PIPE6-7.

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