MC68HC711xxxx Motorola, MC68HC711xxxx Datasheet - Page 55

• Manufacturer Part Number: MC68HC711xxxx
• Description: Microcontrollers
• Manufacturer: Motorola

M68HC11E Family — Rev. 5
MOTOROLA
ELAT — EPROM/OTPROM Latch Control Bit
BYTE — Byte/Other EEPROM Erase Mode Bit
ROW — Row/All EEPROM Erase Mode Bit
ERASE — Erase Mode Select Bit
EELAT — EEPROM Latch Control Bit
EPGM —EPROM/OTPROM/EEPROM Programming Voltage Enable Bit
MBE — Multiple-Byte Programming Enable Bit
When ELAT = 1, writes to EPROM cause address and data to be latched and
the EPROM/OTPROM cannot be read. ELAT can be read any time. ELAT can
be written any time except when EPGM = 1; then the write to ELAT is disabled.
For the MC68HC711E9:
Refer to
Refer to
Refer to
Refer to
EPGM can be read any time and can be written only when ELAT = 1 (for
EPROM/OTPROM programming) or when EELAT = 1 (for EEPROM
programming).
When multiple-byte programming is enabled, address bit 5 is considered a don’t
care so that bytes with address bit 5 = 0 and address bit 5 = 1 both get
programmed. MBE can be read in any mode and always reads 0 in normal
modes. MBE can be written only in special modes.
Address: $1036
Reset:
Read:
Write:
0 = EPROM address and data bus configured for normal reads
1 = EPROM address and data bus configured for programming
0 = Programming voltage to EPROM/OTPROM/EEPROM array
1 = Programming voltage to EPROM/OTPROM/EEPROM array connected
0 = EPROM array configured for normal programming
1 = Program two bytes with the same data
a. EPGM enables the high voltage necessary for both EEPROM and
b. ELAT and EELAT are mutually exclusive and cannot both equal 1.
disconnected
2.5
2.5
2.5
2.5
EPROM/OTPROM programming.
MBE
Bit 7
Operating Modes and On-Chip Memory
Figure 2-15. MC68HC711E20 EPROM Programming
0
EEPROM.
EEPROM.
EEPROM.
EEPROM.
= Unimplemented
6
0
Control Register (EPROG)
ELAT
5
0
EXCOL
4
0
Operating Modes and On-Chip Memory
EXROW
3
0
T1
2
0
EPROM/OTPROM
T0
1
0
Data Sheet
PGM
Bit 0
0
55