h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 610

• Manufacturer Part Number: h8s-2158
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 18 Universal Serial Bus Interface (USB)
18.3.2
EPSZR1 specifies the sizes of the FIFO (number of bytes) used in USB function core endpoints 1
and 2.
To use both endpoints 1 and 2 in this LSI, the size of FIFOs used for endpoints 1 and 2 must be
specified as 16 bytes. To use only endpoint 1 in this LSI, the size of FIFO used for endpoint 1
must be specified as 16 bytes or 32 bytes. If the size of FIFO used for endpoint 1 is specified as 32
bytes, the FIFO for endpoint 2 must be specified as 0 bytes.
EPSZR1 is initialized to H'44 by a system reset or function software reset (see section 18.3.16,
USB Control Registers 0 and 1 (USBCR0, USBCR1)).
Legend:
X: Don’t care
Rev. 3.00 Jan 25, 2006 page 558 of 872
REJ09B0286-0300
Bit
7
6
5
4
3
2
1
0
Bit Name
EP1SZ3
EP1SZ2
EP1SZ1
EP1SZ0
EP2SZ3
EP2SZ2
EP2SZ1
EP2SZ0
Endpoint Size Register 1 (EPSZR1)
Initial Value R/W
0
1
0
0
0
1
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
EP1 FIFO Size
0000 : Setting prohibited
0001 : Setting prohibited
0010 : Setting prohibited
0011 : Setting prohibited
0100 : FIFO size, 16 bytes
0101 : FIFO size, 32 bytes
0110 : Setting prohibited
0111 : Setting prohibited
1XXX: Setting prohibited
EP2 FIFO Size
0000 : FIFO size, 0 byte
0001 : Setting prohibited
0010 : Setting prohibited
0011 : Setting prohibited
0100 : FIFO size, 16 bytes
0101 : Setting prohibited
0110 : Setting prohibited
0111 : Setting prohibited
1XXX: Setting prohibited