MC68HC711K4CFN4 Datasheet, PDF (20/80 Pages) Motorola, Inc – 8-Bit Microcontroller

EXCOL —Select Extra Columns
0 = User array selected
1 = User array is disabled and extra columns are accessed at bits [7:0]. Addresses use bits [11:5]
and bits [4:0] are don't care. EXCOL can only be read in special modes and always returns zero
in normal modes. EXCOL can be written in special modes only.
EXROW —Select Extra Rows
0 = User array selected
1 = User array is disabled and two extra rows are available. Addresses use bits [5:0] and bits [11:6]
are don't care. EXROW can only be read in special modes and always returns zero in normal
modes. EXROW can be written in special modes only.
Bits [2:1] —Not implemented
Always read zero
EPGM —EPROM Programming Voltage Enable
EPGM can be read any time and can only be written when ELAT = 1.
0 = Programming voltage to EPROM array disconnected
1 = Programming voltage to EPROM array connected
MOTOROLA
20
M68HC11 K Series
MC6HC11KTS/D