MC68HC705CT4 Datasheet, PDF (113/152 Pages) Freescale Semiconductor, Inc – General Release Specification

Freescale Semiconductor, Inc.
EPROM
Bootloader Mode
MBE — Multiple Byte Program Enable
READ: Only in special modes, user mode returns a logic 0
WRITE: Only in special modes
1 = Enable the multibyte programming, two bytes at a time.
address bit 4 is don’t care so that the bytes with addresses 5 =
0 and 5 = 1 are both programmed.
0 = Normal programming
TS1 and TS0 — EPROM Test Select Bits
READ: Only in special modes, user mode returns a logic zero
WRITE: Only in special modes
LATCH — EPROM Latch Control
READ: Any time
WRITE: Any time
0 = EPROM address and data bus configured for normal reads
1 = EPROM address and data bus configured for programming.
Causes address and data bus to be latched when a write to
EPROM is done. EPROM cannot be read if LATCH = 1.
EPGM — EPROM Program Control
READ: Any time
WRITE: Cleared any time, set only if LATCH = 1
0 = Programming power switched off the EPROM array
1 = Programming power switched on to the EPROM array. If
LATCH = 0, then EPGM is cleared automatically. EPGM
cannot be set if LATCH is not set. LATCH and EPGM cannot
both be set on the same write.
MC68HC705CT4 — Rev. 2.0
MOTOROLA
General Release Specification
EPROM
113
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