SH7764 Datasheet, PDF (981/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 21 USB 2.0 Host/Function Module (USB)
Bit
Bit Name
Initial
Value R/W Description
1, 0
PID[1:0]
00
R/W • This module sets PID to NAK on detecting a
receive error such as a CRC error three
consecutive times when the host controller
function is selected.
• This module sets PID to STALL (11) on receiving
the STALL handshake when the host controller
function is selected.
To specify each response type, set these bits as
follows.
• To make a transition from NAK (00) to STALL,
set 10.
• To make a transition from BUF (01) to STALL,
set 11.
• To make a transition from STALL (11) to NAK,
set 10 and then 00.
• To make a transition from STALL to BUF, set 00
(NAK) and then 01 (BUF).
Notes: 1. Only 0 can be read and 1 can be written to.
2. Only 1 can be written to.
3. The ACLRM, SQCLR, or SQSET bits should be set while CSSTS is 0 and PID is NAK
and before the pipe is selected by the CURPIPE bits.
4. Before modifying ACLRM, SQCLR, or SQSET bits after modifying the PID bits from
BUF to NAK, it should be checked that CSSTS and PBUSY for the selected pipe are 0.
However, if the PID bits have been modified to NAK through hardware control, checking
PBUSY is not necessary.
Rev. 1.00 Nov. 22, 2007 Page 925 of 1692
REJ09B0360-0100