MC68HC11E1 MOTOROLA [Motorola, Inc], MC68HC11E1 Datasheet - Page 34

• Manufacturer Part Number: MC68HC11E1
• Description: M68HC11E Series Programming Reference Guide
• Manufacturer: MOTOROLA [Motorola, Inc]

M68HC11ERG/AD
34
NOTE:
EPROG is present only on the MC68HC711E20.
MBE — Multiple-Byte Programming Enable
Bit 6 — Unimplemented
ELAT — EPROM/OTPROM Latch Control
EXCOL — Select Extra Columns
EXROW — Select Extra Rows
T[1:0] — EPROM Test Mode Select
PGM — EPROM Programming Voltage Enable
M68HC11E Series Programming Reference Guide
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.
Always reads 0
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 PGM = 1; then the write to ELAT
is disabled.
These bits allow selection of either gate stress or drain stress test modes.
They can be read and written only in special modes and always read 0 in
normal modes.
PGM can be read any time and can be written only when ELAT = 1.
0 = EPROM array configured for normal programming
1 = Program two bytes with the same data
0 = EPROM/OTPROM address and data bus configured for normal reads
1 = EPROM/OTPROM address and data bus configured for
0 = User array selected
1 = User array is disabled and extra columns are accessed at bits [7:0].
0 = User array selected
1 = User array is disabled and two extra rows are available. Addresses
0 = Programming voltage to EPROM array disconnected
1 = Programming voltage to EPROM array connected
programming
Addresses use bits [13:5] and bits [4:0] are don’t care. EXCOL can
be read and written only in special modes and always returns 0 in
normal modes.
use bits [7:0] and bits [13:8] are don’t care. EXROW can be read and
written only in special modes and always returns 0 in normal modes.
T1
0
0
1
1
T0
0
1
0
1
Function Selected
Normal mode
Drain stress
Gate stress
Reserved
MOTOROLA