4: Boot ROM
GP4020 GPS Baseband Processor Design Manual 29
HEADER
BYTE 1 (MSB)
HEADER
BYTE 2
HEADER
BYTE 3 (LSB)
DATA
BYTE 1
Header Bytes 1, 2, 3 produce 24-bit number
indicating total number of Data Bytes (N) to be
received. Byte 1 = Most Significant.
DATA
BYTE 2
DATA
BYTE N-1
DATA
BYTE N
DATA BYTES
TIME
Figure 4.1 Boot ROM UART Download Data Protocol