mc68hc11e0fnr2 Freescale Semiconductor, Inc, mc68hc11e0fnr2 Datasheet - Page 202

• Manufacturer Part Number: mc68hc11e0fnr2
• Description: Hc11 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

EPROM Programming Utility
202
MCU RECEIVE DATA (FROM HOST)
EPROM PROGRAMMING
VERIFY DATA TO HOST
(SAME AS MCU Tx DATA)
MCU TRANSMIT DATA (VERIFY)
INITIALIZE...
X = PROGRAM TIME
Y = FIRST ADDRESS
[12]
[15]
Figure 4. Host and MCU Activity during EPROM PROGRAM Utility
NO
PROGRAM Utility in MCU
READ PROGRAMMED DATA
POINT TO NEXT LOCATION
ANY DATA RECEIVED ?
PROGRAM CONTINUES
AND SEND TO VERIFY
TO BE PROGRAMMED
[8]
AS LONG AS DATA
PROGRAM BYTE
IS RECEIVED
SEND $FF
START
YES
[9]
WAIT1
[1]
[8]
$FF
$FF
INDICATES READY
TO HOST
$BF00 - PROGRAM
[3]
[10]
[2]
[13]
[11]
M68HC11 Bootstrap Mode, Rev. 1.1
[9]
D1
[4]
[14]
[10]
P1
D2
[11]
[5]
[13]
[12]
P2
V1
V1
[6]
FROM MCU BEFORE SENDING DATA
HOST NORMALLY WAITS FOR $FF
[14]
[7]
FOR EPROM PROGRAMMING
YES
NO
NO
V2
D3
V2
[15]
VERIFY DATA CORRECT ?
SEND FIRST DATA BYTE
MORE DATA TO SEND ?
VERIFY DATA RECEIVED ?
[5]
MORE TO VERIFY ?
SEND NEXT DATA
[7]
P3
D4
Driver Program in HOST
START
DONE
YES
YES
YES
NO
DATA_LOOP
P4
V3
V3
[4]
NO
[3]
[6]
D5
Freescale Semiconductor
V4
V4
INDICATE ERROR
MC68HC711E9
EXECUTING
"PROGRAM" LOOP
HOST SENDING
DATA FOR
MCU EPROM