mc68hc908ld64 Freescale Semiconductor, Inc, mc68hc908ld64 Datasheet - Page 141

• Manufacturer Part Number: mc68hc908ld64
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Notes:
1. PTA7 = 0 if serial communication; PTA7 = 1 if parallel communication
2. External clock is derived by a 4.9152/9.8304 MHz crystal or off-chip oscillator
GND
V
V
GND
IRQ
V
V
or
TST
TST
X
DD
or
DD
GND
V
V
RST
V
V
V
V
or
or
TST
TST
DD
DD
DD
DD
Not Blank
Address
"$FFFF"
$FFFE/
$FFFF
Blank
X
X
X
PTC3
X
0
1
X
X
Table 10-1. Monitor Mode Signal Requirements and Options
PTC1
X
0
0
X
X
PTC0
X
1
1
X
X
PTA7
X
0
0
0
X
(1)
DMINUS0
DPLUS0
PTD4
PTD5
X
0
0
0
X
External
Clock
4.9152
9.8304
9.8304
MHz
MHz
MHz
X
X
(2)
Frequency
2.4576
2.4576
2.4576
MHz
MHz
MHz
Bus
—
0
Disabled
Disabled
Disabled
Disabled
Enabled
COP
Baud
9600
9600
9600
Rate
—
0
No operation until
reset goes high.
Enters monitor mode.
PTC0, PTC1, and PTC3
voltages only required if
IRQ = V
PTC3 determines
frequency divider.
Exit monitor mode by POR
or by RST low then high
Enters monitor mode.
PTC0, PTC1, and PTC3
voltages only required if
IRQ = V
PTC3 determines
frequency divider.
Exit monitor mode by POR
or by RST low then high
Enters monitor mode.
External frequency always
divided by 4.
Exit monitor mode by POR
only.
Enters user mode.
Comment
TST
TST
;
;