MC68HC705MC4 Datasheet, PDF (18/99 Pages) Motorola, Inc – Microcontrollers

MC68HC705MC4 Specification Rev. 1.5
Table 2-2: Bootloader Functions
PC0 PC2 PC3
MODE
SYNC 1
1
PROGRAM/VERIFY
SYNC 1
0
VERIFY ONLY
SYNC 0
0
DUMP EPROM
The bootloader uses an external 12-bit counter to address the external memory device
containing the code to be copied. This counter requires a clock and a reset function and
can address up to 4K bytes of memory.
PORT A
CLK (OUT)
SYNC (IN)
DATA OUT
HOST READ DATA
(a) DUMP EPROM INTERFACE TO A HOST
CLK (OUT)
DATA READ
SYNC (IN)
DATA IN
(b) PROGRAM/VERIFY INTERFACE TO A HOST
Figure 2-2: Programmer Interface to Host
Section 2: Operating Modes
MOTOROLA
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