r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 964

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 16 USB Function Module (USB)
16.3.25 Endpoint Stall Register 1 (EPSTL1)
Bits 2 to 0 in EPSTL1 are used to forcibly stall the corresponding endpoints on the application
side. While a bit is set to 1, the corresponding endpoint returns a stall handshake to the host. Bits 6
to 4 are used to clear the stall settings for the endpoints (bits 2 to 0). Writing 1 to the stall setting
bit and stall clear bit for an endpoint at the same time is prohibited.
For detailed operation, see section 16.7, Stall Operations.
Rev. 1.00 Sep. 19, 2008 Page 934 of 1342
REJ09B0467-0100
Bit
7
6
5
4
3
2
1
0
Bit Name

EP3 STLC
EP2 STLC
EP1 STLC

EP3 STLS
EP2 STLS
EP1 STLS
Initial
Value
0
0
0
0
0
0
0
0
R/W

W
W
W

R/W
R/W
R/W
Description
Reserved
This bit is always read as 0. The write value should
always be 0.
EP3 Stall Clear
Writing 1 to this bit clears the EP3 STLS bit to 0.
Writing 0 is ignored.
EP2 Stall Clear
Writing 1 to this bit clears the EP2 STLS bit to 0.
Writing 0 is ignored.
EP1 Stall Clear
Writing 1 to this bit clears the EP1 STLS bit to 0.
Writing 0 is ignored.
Reserved
This bit is always read as 0. The write value should
always be 0.
EP3 Stall Setting
Writing 1 to this bit specifies a stall for EP3. Writing 0
is ignored.
EP2 Stall Setting
Writing 1 to this bit specifies a stall for EP2. Writing 0
is ignored.
EP1 Stall Setting
Writing 1 to this bit specifies a stall for EP1. Writing 0
is ignored.