Laptop User Manual

S3C2440A RISC MICROPROCESSOR USB DEVICE
13-11
FRAME NUMBER REGISTER (FPAME_NUM1_REG/FRAME_NUM2_REG)
When the host transfers USB packets, each Start Of Frame (SOF) packet includes a frame number. The USB
device controller catches this frame number and loads it into this register automatically.
Register Address R/W Description Reset Value
FRAME_NUM1_REG 0x52000170(L)
0x52000173(B)
R
(byte)
Frame number lower byte register 0x00
FRAME_NUM_REG Bit MCU USB Description Initial State
FRAME_NUM1 [7:0] R W Frame number lower byte value 00
Register Address R/W Description Reset Value
FRAME_NUM2_REG 0x52000174(L)
0x52000177(B)
R
(byte)
Frame number higher byte register 0x00
FRAME_NUM_REG Bit MCU USB Description Initial State
FRAME_NUM2 [7:0] R W Frame number higher byte value 00