Z51F3220FNX Datasheet, PDF (299/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
FMCR (Flash Mode Control Register) : FEH
7
6
5
4
FMBUSY
–
–
–
R
–
–
–
3
2
1
0
–
FMCR2
FMCR1
FMCR0
–
R/W
R/W
R/W
Initial value : 00H
FMBUSY
FMCR[2:0]
Flash Mode Busy Bit. This bit will be used for only debugger.
0
No effect when “1” is written
1
Busy
Flash Mode Control Bits. During a flash mode operation, the CPU is
hold and the global interrupt is on disable state regardless of the IE.7
(EA) bit.
FMCR2 FMCR1 FMCR0 Description
0
0
1
Select flash page buffer reset mode
and start regardless of the FIDR
value (Clear all 64bytes to ‘0’)
0
1
0
Select flash sector erase mode and
start operation when the
FIDR=”10100101b’
0
1
1
Select flash sector write mode and
start operation when the
FIDR=”10100101b’
1
0
0
Select flash sector hard lock and
start operation when the
FIDR=”10100101b’
Others Values: No operation
(These bits are automatically cleared to logic ‘00H’ immediately after
one time operation)
PS029902-0212
PRELIMINARY
297