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| Z51F3220FNX Datasheet, PDF (300/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers | |||
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Z51F3220
Product Specification
15.1.6 Serial In-System Program (ISP) Mode
Serial in-system program uses the interface of debugger which uses two wires. Refer to chapter 14 in details
about debugger
15.1.7 Protection Area (User program mode)
Z51F3220 can program its own flash memory (protection area). The protection area can not be erased or
programmed. The protection areas are available only when the PAEN bit is cleared to â0â, that is, enable
protection area at the configure option 2 if it is needed. If the protection area isnât enabled (PAEN =â1â), this area
can be used as a normal program memory.
The size of protection area can be varied by setting of configure option 2.
Table 15-2 Protection Area size
Protection Area Size Select
PASS1
PASS0
0
0
0
1
1
0
1
1
Size of Protection Area
3.8k Bytes
1.7k Bytes
768 Bytes
256 Bytes
NOTE) Refer to chapter 16 in configure option control.
Address of Protection Area
0100H â 0FFFH
0100H â 07FFH
0100H â 03FFH
0100H â 01FFH
PS029902-0212
PRELIMINARY
298
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