mc68hc908ld64 Freescale Semiconductor, Inc, mc68hc908ld64 Datasheet - Page 139

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

MC68HC908LD64
Freescale Semiconductor
NOTES:
DB-25
10 µF
10 µF
1. SW2: Position C — For monitor mode entry when IRQ = V
2. SW2: Position D — For monitor mode entry when reset vector is blank ($FFFE and $FFFF = $FF):
3. See
2
3
7
+
+
SW1: Position A — Bus clock = OSCXCLK ÷ 4
SW1: Position B — Bus clock = OSCXCLK ÷ 2
Bus clock = OSCXCLK ÷ 4; PTC0, PTC1, and PTC3 voltages are not required.
Table 24-4
—
1
3
4
2
5
6
Rev. 3.0
MC145407
for IRQ voltage level requirements.
Figure 10-1. Monitor Mode Circuit
20
18
17
19
16
15
(See NOTES)
10 Ω
+
+
V
TST
10 µF
10 µF
Monitor ROM (MON)
C
D
V
1
2
6
4
7
DD
SW2
MC74LCX125
20 pF
TST
:
(See NOTES)
20 pF
9.8304 MHz
14
3
5
10 kΩ
V
V
DD
DD
A
X1
0.1 µF
V
10 kΩ
DD
B
V
DD
0.1 µF
SW1
V
0.1 µF
DD
10 MΩ
10 kΩ
10 kΩ
V
V
DD
DD
Functional Description
Monitor ROM (MON)
OSC1
OSC2
V
DPLUS0
DMINUS0
PTD4/DDCSCL
PTD5/DDCSDA
PTA0
PTC3
PTC0
PTC1
PTA7
68HC908LD64
RST
IRQ
V
V
V
V
V
SS1
SS2
SSA
DD
DD
DD
1
2
A
Data Sheet
139