MC68HC05B4 Datasheet, PDF (172/298 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit

Bootstrap RAM
PD4 set?
N
Y
Load next RAM
byte
N _{RAM full?}
Y
Execute RAM
program at $0050
Green LED on
Execute RAM
program at $0083
A
N _{PD3 set?}
Y
Serial EPROM (RAM) bootstrap
Red LED off
Transmit last four
programmed locations
Receive address
Receive four data
Bad EPROM
programming
Y Negative
address?
N
Program EPROM data
at address; green LED
flashes
Red LED on
N
Y _{Programming OK?}
Figure C-4 Modes of operation flow chart (2 of 2)
14
MOTOROLA
C-10
MC68HC705B5
TPG
MC68HC05B6
Rev. 4