参数资料
型号: M66291GP
元件分类: 总线控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP48
封装: 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48
文件页数: 88/128页
文件大小: 928K
代理商: M66291GP
M66291GP/HP
Rev 1.01 2004.11.01 page 60 of 122
2.29 CPU_FIFO Data Register
CPU_FIFO Data Register (CPU_FIFO_DATA)
<Address : H’44>
b15
14
13
12
11
10
9876
54321
b0
CPU_FIFO
????
??????
?
?????
----
------
----
------
<H/W reset : H'????>
<S/W reset : ->
<USB bus reset : ->
b
Bit name
Function
R
W
15~0
CPU_FIFO
CPU_FIFO Data
<When set to OUT buffer>
Read
Reads receive data
<When set to IN buffer>
Write
Writes transmit data
Note:The upper 8 bits (b15 to b8) become invalid in the 8-bit mode (using the Octl bits or *HWR/*BYTE pin).
(1) CPU_FIFO(CPU_FIFO Data) Bits (b15~b0)
The receive data from the CPU side buffer is read or the transmit data to the CPU side buffer is written
through this register.
When set to OUT buffer (EPi_DIR bit = “0”), the receive data from the CPU side buffer is read through this
register.
When set to IN buffer (EPi_DIR bit = “1”), the transmit data to the CPU side buffer is written through this
register.
Make sure that the Creq bit is equal to “0” before reading/writing these bits.
Note:
Refer to “3.2 FIFO Buffer” for CPU/SIE side.
Note:
When set to 16-bit mode, the M66291 is capable of recognizing the byte data written. Hence, it is possible to
transmit the odd byte data by setting “1” to the IVAL bit after writing the byte data.
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