MC68HC11E0CFNE2 Datasheet, PDF (49/242 Pages) Freescale Semiconductor, Inc – M68HC11 CPU, Power-saving stop and wait modes, Low-voltage devices available (3.0–5.5 Vdc)

EPROM/OTPROM
2.4.3 EPROM and EEPROM Programming Control Register
The EPROM and EEPROM programming control register (PPROG) enables the EPROM programming
voltage and controls the latching of data to be programmed.
• For MC68HC711E9, PPROG is also the EEPROM programming control register.
• For the MC68HC711E20, EPROM programming is controlled by the EPROG register and
EEPROM programming is controlled by the PPROG register.
Address: $103B
Bit 7
Read:
ODD
Write:
6
EVEN
5
ELAT⁽¹⁾
4
BYTE
3
ROW
2
ERASE
1
EELAT
Reset: 0
0
0
0
0
0
0
1. MC68HC711E9 only
Figure 2-14. EPROM and EEPROM Programming
Control Register (PPROG)
Bit 0
EPGM
0
ODD — Program Odd Rows in Half of EEPROM (Test) Bit
Refer to 2.5 EEPROM.
EVEN — Program Even Rows in Half of EEPROM (Test) Bit
Refer to 2.5 EEPROM.
ELAT — EPROM/OTPROM Latch Control 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.
0 = EPROM address and data bus configured for normal reads
1 = EPROM address and data bus configured for programming
For the MC68HC711E9:
a. EPGM enables the high voltage necessary for both EEPROM and EPROM/OTPROM
programming.
b. ELAT and EELAT are mutually exclusive and cannot both equal 1.
BYTE — Byte/Other EEPROM Erase Mode Bit
Refer to 2.5 EEPROM.
ROW — Row/All EEPROM Erase Mode Bit
Refer to 2.5 EEPROM.
ERASE — Erase Mode Select Bit
Refer to 2.5 EEPROM.
EELAT — EEPROM Latch Control Bit
Refer to 2.5 EEPROM.
EPGM —EPROM/OTPROM/EEPROM Programming Voltage Enable Bit
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).
0 = Programming voltage to EPROM/OTPROM/EEPROM array disconnected
1 = Programming voltage to EPROM/OTPROM/EEPROM array connected
M68HC11E Family Data Sheet, Rev. 5.1
Freescale Semiconductor
49