mg84fl54 Megawin Technology, mg84fl54 Datasheet - Page 101

• Manufacturer Part Number: mg84fl54
• Description: Full-speed Usb Micro-controller
• Manufacturer: Megawin Technology

20.2.2. Description for ISP Operation
Before doing ISP operation, the user should fill the bits XCKS4~XCKS0 in CKCON register with a proper value.
(Refer to
7.3 Clock
Register)
To do Page Erase (512 Bytes per Page)
Step 1: Set [MS1,MS0]=[1,1] in ISPCR register to select Page Erase Mode.
Step 2: Fill page address in IFADRH & IFADRL registers.
Step 3: Sequentially write 0x46h then 0xB9h to SCMD register to trigger an ISP processing.
To do Byte Program
Step 1: Set [MS1,MS0]=[1,0] in ISPCR register to select Byte Program Mode.
Step 2: Fill byte address in IFADRH & IFADRL registers.
Step 3: Fill data to be programmed in IFD register.
Step 4: Sequentially write 0x46h then 0xB9h to SCMD register to trigger an ISP processing.
To do Read
Step 1: Set [MS1,MS0]=[0,1] in ISPCR register to select Read Mode.
Step 2: Fill byte address in IFADRH & IFADRL registers.
Step 3: Sequentially write 0x46h then 0xB9h to SCMD register to trigger an ISP processing.
Step 4: Now, the Flash data is in IFD register.
MEGAWIN
MG84FL54B Data sheet
101