MC68HC908JL8 MOTOROLA [Motorola, Inc], MC68HC908JL8 Datasheet - Page 120

• Manufacturer Part Number: MC68HC908JL8
• Description: Motorola reserves the right to make changes without further notice to any products herein
• Manufacturer: MOTOROLA [Motorola, Inc]

Monitor ROM (MON)
9.4.1 Entering Monitor Mode
Technical Data
120
NOTES:
1. RC oscillator cannot be used for monitor mode; must use either external oscillator or XTAL oscillator circuit.
2. See
V
V
IRQ
TST
TST
V
V
DD
DD
(2)
(1)
Table 19-4
(contain
BLANK
BLANK
$FFFE
$FFFF
$FF)
NOT
and
X
X
for V
Table 9-1. Monitor Mode Entry Requirements and Options
TST
voltage level requirements.
0
1
X
X
Table 9-1
specified in the table, monitor mode may be entered after a POR.
Communication at 9600 baud will be established provided one of the
following sets of conditions is met:
1. If IRQ = V
2. If IRQ = V
3. If $FFFE and $FFFF are blank (contain $FF):
Freescale Semiconductor, Inc.
X
X
0
0
For More Information On This Product,
– Clock on OSC1 is 4.9125MHz
– PTB3 = low
– Clock on OSC1 is 9.8304MHz
– PTB3 = high
– Clock on OSC1 is 9.8304MHz
– IRQ = V
X
X
1
1
shows the pin conditions for entering monitor mode. As
X
1
1
1
Go to: www.freescale.com
Monitor ROM (MON)
TST
TST
OSC1 Clock
4.9152MHz
9.8304MHz
9.8304MHz
DD
:
:
X
(1)
2.4576MHz
2.4576MHz
2.4576MHz
Frequency
OSC1 ÷ 4
Bus
High voltage entry to
monitor mode.
9600 baud communication
on PTB0. COP disabled.
Blank reset vector (low-
voltage) entry to monitor
mode.
9600 baud communication
on PTB0. COP disabled.
Enters User mode.
MC68HC908JL8
Comments
MOTOROLA
—
Rev. 2.0