ADLINK CoreExpress-ECO2 - Manual (Page 26)

4.19 Set Address/Length for Flash Access
This command prepares the read or write access to the SMC-Flash. For this, the address and the
length information must be set in the first step. In the next step the Data can be read or write to the
Flash. The address must have a 16-bit format and a length information about the number of bytes to
write. For accesses to the USER-Area be sure that the address have 32-bit alignment and is within
1kB (or 512Bytes), so 0x0000, 0x0004, 0x0008, …, 0x03f8, 0x03fc are valid addresses. To access
the SECURE-Area the address must be 0x8000 or greater but not higher than 0x807c. The memory
map is show in Table 4.14.1.
The number of bytes to write must be a multiple of 4 and not more than 32 Bytes.
No Memory
0xFFFF
0x8080
SECURE-Data
0x807F
0x8000
No Memory
0x7FFF
0x0400
USER-Data
0x03FF
0x0000
Table 4.19.1 Memory-Map of SMC-Flash with 1024 Bytes User-Data
START SMC_addr ACK command ACK length ACK MSB_Addr ACK LSB_Addr ACK
Data_length ACK STOP
Table 4.19.2 SMC receiver format of the Set Address/Length for Flash Access Command Code
ITEM DESCRIPTION
START SM-bus start condition
SMC_addr 0x50 (8-bit)
ACK SM-bus acknowledge condition generated by receiver
command 0x40 = “Set Address/Length for Flash Access” Command code
length 0x03 = 3 Bytes data length
MSB_byte High-byte of Flash-Address
LSB_byte Low-byte of Flash-Address (32bit-alignment)
Data_length Number of Data-Bytes to read or write (in steps of 4)
STOP SM-bus stop condition
Table 4.19.3 Explanation of Table 4.19.2