m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 209
m5m51016btp
Manufacturer Part Number
m5m51016btp
Description
Renesas 16-bit Single-chip Microcomputer M16c Family / M16c/20 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M5M51016BTP.pdf
(367 pages)
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M30245 Group
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
Figure 2.8.48. USB endpoint x(x=1 to 4) IN FIFO configuration register
USB Endpoint x IN FIFO register
(b15)
0 0 0 0
b7
This register sets endpoint x(x=1 to 4) IN FIFO.
•BUF_NUM
•BUF_SIZ
•DBL_BUF
•CONTINUE
Pay attention to the following when setting this register:
The configuration of USB endpoint x(x=1 to 4) IN FIFO configuration register is shown in Figure
2.8.48.
- Not exceed 3072 bytes in IN FIFO starting location + IN FIFO size.
- Not overlap endpoint FIFOs each other.
USB endpoint x(x=1 to 4) IN FIFO configuration register
This bit sets the starting location of the endpoint x(x= 1 to 4) IN FIFO per 64 bytes. For example,
when IN FIFO is allocated, starting at the 320th byte, the set value is “000101
This bit sets one buffer size of the endpoint x(x= 1 to 4) IN FIFO per 64 bytes. For example, when 256
bytes is set, the set value is “0100
With this bit being set to “1”, IN FIFO of the corresponding endpoint is changed into double buffer
mode. The byte count for a valid IN FIFO becomes twice as much as the value specified by the
BUF_SIZ at the time of double buffer. Set carefully not to overlap with the FIFO start position of other
endpoints.
Set this bit to “1” when continuous transmit is enabled. The bit is valid only in bulk transfer.
The USB function control unit, by dividing one buffer data equal to the byte count set in the BUF_SIZ
in the IN FIFO into one packet size (the maximum packet size set in the EPxIMP) units, transmits
them one by one to the host PC. (When the last one packet is smaller than the size set in the
EPxIMP, it is transmitted as a short packet.) When continuous transmit mode is enabled, the value
set in the BUF_SIZ has to be equal to an integral multiple of the maximum packet size.
(b8)
b0
page 200 of 354
b7
b0
2
BUF_NUM
BUF_SIZ
DBL_BUF
CONTINUE
Reserved
Note: Valid for bulk transfer type only.
Bit Symbol
”.
Symbol
EPxIFC (x = 1 - 4)
Bit Name
FIFO buffer
start number
FIFO buffer size
Double buffer mode
Continuous transfer
mode
02A2
02AE
Address
16
16
Select the starting number for the EPx IN FIFO
(in units of 64 bytes)
000000 : buffer stating location = 0
000001 : buffer stating location = 64
000010 : buffer stating location = 128
......
101111 : buffer stating location = 3008 (last starting number)
Select the buffer size for the EPx IN FIFO
(in units of 64 bytes)
0000 : buffer stating location = 64
0001 : buffer stating location = 128
0010 : buffer stating location = 192
......
1111 : buffer stating location = 1024 (largest buffer size)
0 : Disabled
1 : Enabled
0 : Disabled
1 : Enabled (Note)
Must always be set to “0”
, 02A8
, 02B4
16
16
,
Function
When reset
0000
2
”.
16
2. USB function
R W
O O
O O
O O
O O
O O
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