IBM EM78M611E manual RF Interrupt Status Register, Default Value 0B00000000

EM78M611E

Universal Serial Bus Series Microcontroller

8.2.2.12RD (USB Application FIFO Address Register) Default Value: (0B_0000_0000)

Bit	7	Bit	6	Bit	5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
0		0		0		UAD4	UAD3	UAD2	UAD1	UAD0

RD [0~4] USB Application FIFO address registers. These five bits are the address pointers of USB Application FIFO.

RD [5~7] Undefined registers. The default value is zero.

8.2.2.13RE (USB Application FIFO Data Register) Default Value: (0B_0000_0000)

Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
UD7	UD6	UD5	UD4	UD3	UD2	UD1	UD0

RE (USB Application FIFO data register) contains the data in the register of which address is pointed by RD.

NOTE

For example, if user wants to read the fourth byte of EndPoint Zero, user has to use the address of EP0 (0x00) and Data Byte Pointer of EP0 (0x10) to access it.

//Read the 4th byte of the EP0 FIFO

//First, assign the data byte pointer of EP0 register (0X10) with 0X03. MOV A, @0X10

MOVRD, a // Move data in A to RD register MOV A, @0X03

MOVRE , A // Move data in A to RE register

//Then read the content from EP0 FIFO (0x00) 4th byte

MOV A, @0X00

MOVRD, A // Assign address point to EP0 FIFO

MOVA, RE // Read the fourth byte data (Byte 3) of the EP0 FIFO

MOV A, 0X0E// Read the fifth byte data (Byte 4) of the EP0 FIFO

8.2.2.14 RF (Interrupt Status Register)				Default Value: (0B_0000_0000)
Bit 7	Bit 6	Bit 5	Bit 4		Bit 3	Bit 2	Bit 1	Bit 0
USB Host	SE2_IF	SE1_IF	Port7 state		USB	USB	EP0_IF	TCC_IF
Resume_IF			change_1F		Reset_IF	Suspend_IF

RF [0] TCC Overflow interrupt flag. It will be set while TCC overflows, and is cleared by firmware.

RF [1] EndPoint Zero interrupt flag. It will be set when the EM78M611E receives Vendor/Customer Command to EndPoint Zero. This bit is cleared by firmware.

Product Specification (V1.11) 04.20.2007 • 15

(This specification is subject to change without further notice)