MC68HC711E20CFS2 MOTOROLA [Motorola, Inc], MC68HC711E20CFS2 Datasheet - Page 230

• Manufacturer Part Number: MC68HC711E20CFS2
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Application Note
230
FROM OC5 PIN
MC68HC68T1
XIRQ/V
TO MCU
OF MCU
TO MCU
XIRQ/V
PIN
PIN
TO
PPE
PPE
BE SURE NO
REMOVE J7
JUMPER IS
JUMPER
ON J14
J14
J7
R14–Rl5. The PE7 input was chosen because the internal circuitry for
port E pins can tolerate voltages slightly higher than V
resistors R14 and R15 are less critical. No data to be programmed is
passed to the target MCU until the master MCU senses that V
been stable for about 200 ms.
When V
diode) and begins passing data to the target MCU.
Programming Utility
master MCU to the target MCU and programmed into the EPROM of the
target. The master MCU in the EVBU corresponds to the HOST in the
programming utility description and the "PROGRAM utility in MCU" is
running in the bootstrap ROM of the target MCU.
Each byte of data sent to the target is programmed and then the
programmed location is read and sent back to the master for verification.
If any byte fails, the red and green LEDs are turned off, and the
programming operation is aborted. If the entire 12 Kbytes are
programmed and verified successfully, the red LED is turned off, and the
green LED is turned on to indicate success. The programming of all 12
Kbytes takes about 30 seconds.
After a programming operation, the V
before the EVBU power is turned off.
Freescale Semiconductor, Inc.
V
For More Information On This Product,
DD
Figure 7. Isolating EVBU XIRQ Pin
47K
RN1D
PP
is ready, the master MCU turns on the red LED (light-emitting
Go to: www.freescale.com
P4-18
P5-18
CUT TRACE
AS SHOWN
explains the activity as data is sent from the
46
44
38
48
34
35 33
47
41
45
28
27
2
PP
1
19
15
switch (S2) should be turned off
7
21
9
20
8
10
1
EPROM
3
1
DD
AN1060 — Rev. 1.0
; therefore,
1
MOTOROLA
PP
13
has
25
+