GMS30C7201 Datasheet, PDF (217/352 Pages) Hynix Semiconductor – 60MHz operation frequency Low power consumption

RXDATA (USBD Receive Data Register
Fast AMBA Peripherals
Bit 31 ......... 24 23 ........ 16 15 ........ 8 7 ........ 0
lsb N+3 msb lsb N+2 msb lsb N+1 msb lsb N
msb
Figure 12-22: USBD Receive Data Register Bits
32-bit receive data register. DMAC reads 4 bytes at data read strobe. Each byte is presented lsb
first. N is represented as Rx FIFO address.
TXDATA (USBD Transmit Data Register)
Bit 31 ......... 24 23 ........ 16 15 ........ 8 7 ........ 0
lsb N+3 msb lsb N+2 msb lsb N+1 msb lsb N
msb
Figure 12-23: USBD Transmit Data Register Bits
32-bit transmit data register. DMAC writes 4 bytes at data write strobe. Each byte is presented
lsb first. N is represented as Tx FIFO address.
STATUS (USBD status register) (Base address + 0x08)
Bit 7
6
5
4
3
2
1
0
RESERVED
EMPTY FULL
Figure 12-24: USBD Status Register Bits
FULL: this bit indicates that Rx FIFO is filled. When it is 1, automatically, AMBA I/F generates
a DMAC request signal. DMAC can read the RxDATA register according to read strobe.
EMPTY: this bit indicates that Tx FIFO is empty when the the CONT0 TXEN bit is set to
1.
GMS30C7201 Data Sheet
12-63