mc68hc908lb8 Freescale Semiconductor, Inc, mc68hc908lb8 Datasheet - Page 213

• Manufacturer Part Number: mc68hc908lb8
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Function
[Pin No.]
Monitor
Monitor
MON08
Normal
Forced
Mode
1. PTA0 must have a pullup resistor to V
2. Communication speed in the table is an example to obtain a baud rate of 9600. Baud rate using external oscillator is bus frequency / 256 and
3. External clock is an 9.8304 MHz on OSC1.
4. X = don’t care
5. MON08 pin refers to P&E Microcomputer Systems’ MON08-Cyclone 2 by 8-pin connector.
User
—
baud rate using internal oscillator is bus frequency / 417.
(PTC2)
V
GND
GND
V
IRQ
V
V
[6]
TST
or
TST
X
DD
DD
(PTA5)
GND
RST
RST
V
V
V
V
[4]
DD
DD
DD
DD
Vector
(blank)
(blank)
Reset
$FF
$FF
$FF
Not
—
X
X
Table 19-1. Monitor Mode Signal Requirements and Options
Communication
DD
Serial
PTA0
COM
in monitor mode.
[8]
X
1
1
1
X
OSC1
V
NC
NC
NC
NC
NC
NC
DD
MOD0
PTA1
[12]
11
13
15
X
X
X
X
Selection
1
1
3
5
7
9
Mode
MOD1
PTA4
[10]
10
12
14
16
X
0
X
X
X
2
4
6
8
GND
RST
IRQ
PTA0
PTA4
PTA1
NC
NC
Disabled
Disabled
Disabled
Enabled
COP
—
X
9.8304 MHz 2.4576 MHz
9.8304 MHz 2.4576 MHz
External
Clock
OSC1
[13]
X
X
X
Communication
Speed
Frequency
4 MHz
Bus
—
X
X
Baud
9600
9600
9600
Rate
—
X
X
Reset condition
Provide external clock
at OSC1
Provide external clock
at OSC1
Internal clock is active
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