參數(shù)資料
型號(hào): M37640E8
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCONTROLLER
中文描述: 單芯片8位CMOS單片機(jī)
文件頁數(shù): 75/172頁
文件大?。?/td> 1193K
代理商: M37640E8
7600 Series
Mitsubishi Microcomputer
M37640E8-XXXF Preliminary Specification
Universal Serial Bus
7/9/98
2-63
Figure 2-79. USB Endpoint x OUT MAXP
The
USB Endpoint x OUT WRT CNT Low
& the
USB Endpoint x OUT WRT CNT High
registers, shown in Figure 2-80 and Figure 2-81, contain the number of bytes in the Endpoint x OUT
FIFO. The USB FCU sets the values in these two Write Count Registers after having successfully
received a packet of data from the host. The CPU reads these two registers to determine the number of
bytes to be read from the FIFO. The CPU should read WRT CNT Low first then WRT CNT High.
Figure 2-80. USB Endpoint x OUT WRT CNT Low
Figure 2-81. USB Endpoint x OUT WRT CNT High
The
USB Endpoint x FIFO Registers
, shown in Figure 2-82 through Figure 2-86, are the USB IN
(transmit) and OUT (receive) FIFO data registers. The CPU writes data to these registers for the
corresponding Endpoint IN FIFO and reads data from these registers for the corresponding Endpoint
OUT FIFO.
Figure 2-82. USB Endpoint 0 FIFO Register
Figure 2-83. USB Endpoint 1 FIFO Register
Figure 2-84. USB Endpoint 2 FIFO Register
OMAXP7:0
Maximum packet size (MAXP) of Endpoint x OUT packet.
MAXP = n for endpoints 2, 3, 4
MAXP = n * 8 for endpoint 1
n is the value written to this register. For endpoints that support a smaller
FIFO size, unused bits are not implemented (always write “0” to those bits)
MSB
7
LSB
0
OMAXP7
OMAXP6
OMAXP5
OMAXP4
OMAXP3
OMAXP1
OMAXP0
Access: R/W
OMAXP2
Address: 005C
16
W_CNT7:0
Byte Count. This register contains the lower 8 bits of the byte count register
MSB
7
LSB
0
W_CNT7
W_CNT6
W_CNT5
W_CNT4
W_CNT3
W_CNT1
W_CNT0
Access: R
Reset: 00
16
W_CNT2
Address: 005D
16
W_CNT9:8
Byte Count. This register contains the upper 2 bits of the byte count register
Bits 7:2
Reserved (Read “0”)
MSB
7
LSB
0
Reserved
Reserved
Reserved
Reserved
Reserved
W_CNT9
W_CNT8
Access: R
Reset: 00
16
Address: 005E
16
Reserved
DATA_7:0
Endpoint 0 IN/OUT FIFO register
MSB
7
LSB
0
DATA_7
DATA_6
DATA_5
DATA_4
DATA_3
DATA_1
DATA_0
Access: R/W
Reset: N/A
DATA_2
Address: 0060
16
DATA_7:0
Endpoint 1 IN/OUT FIFO register
MSB
7
LSB
0
DATA_7
DATA_6
DATA_5
DATA_4
DATA_3
DATA_1
DATA_0
Access: R/W
Reset: N/A
DATA_2
Address: 0061
16
DATA_7:0
Endpoint 2 IN/OUT FIFO register
MSB
7
LSB
0
DATA_7
DATA_6
DATA_5
DATA_4
DATA_3
DATA_1
DATA_0
Access: R/W
Reset: N/A
DATA_2
Address: 0062
16
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