mg87fe Megawin Technology, mg87fe Datasheet - Page 35

• Manufacturer Part Number: mg87fe
• Description: 8 Bits Microcontroller
• Manufacturer: Megawin Technology

SCMD (Sequential Command Data register)
SCMD is the command port for triggering ISP/IAP/IAPLB activity. If SCMD is filled with
sequential 0x46h, 0xB9h and if ISPCR.7 = 1, ISP activity will be triggered.
ISPCR (ISP Control Register)
12.1 In-Application-Programmable (IAP)
The flash memory between IAPLB and ISP start address could be defined as data flash memory
and can be accessed by the ISP operation in field application. The size of IAP flash memory is
variable. It is defined by IAPLB.
When the MG87FE/L52 was boots from LD-memory, AP-memory and data flash memory are
opened for ISP operation.
SWRST
ISPCR
B3~B0
SCMD
ISPEN
SWBS
Name
Name
CFAIL
= 0, Global disable all ISP/IAP program/erase/read function.
= 1, Enable ISP/IAP program/erase/read function.
= 0, Boot from main-memory after reset.
= 1, Boot from ISP memory after reset.
= 0, No operation
= 1, Generate software system reset. It will be cleared by hardware automatically.
= 0, The last ISP/IAP command has finished successfully.
= 1, The last ISP/IAP command fails. It could be caused since the access of flash
Reserved
ISPEN
Bit7
Bit7
memory was inhibited.
Megawin Technology Co., Ltd.
SWBS
Bit6
Bit6
SWRST
Bit5
Bit5
Preliminary
CFAIL
Bit4
Bit4
CMD
ver 1.3
Bit3
Bit3
Bit2
Bit2
Date: 2009-JAN-20
MG87FE/L52
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Bit1
Bit1
Bit0
Bit0
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