Hi guys, I am trying to use ISP command "Write to RAM" from the embeded system. The system is using Renesas controller and has connections to MCB2103's TXD0, RXD0, RST, P0.14. So it can control LPC2103 to run ISP command. I managed to start ISP handler and send ISP command successfully, and I am getting CMD_SUCCESS to "W 1073742336 4<CR><LF>". Now I have 4 byte raw data to send, {1, 2, 3, 4}. What I am sending is like: 0x24, 0x60,0x30,0x28,0x23, 0x21,0x60,0x60,0x60, then as a checksum, 0x0a. I was expecting "OK<CR><LF>" or "RESEND<CR><LF>" but LPC2103's response is looking like garbages, they are 2 bytes, 0x60, 0x0a. What am I doing wrong? Any idea? Thanks.