HC705CT4GRSSLASHD datasheet(113/152 Pages) NXP

113 / 152 page

EPROM

Bootloader Mode

MC68HC705CT4 — Rev. 2.0

General Release Specification

MOTOROLA

EPROM

113

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.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

HC705CT4GRS/D 데이터시트(PDF) 113 Page - NXP Semiconductors