MC908JL16CFAE FREESCALE [Freescale Semiconductor, Inc], MC908JL16CFAE Datasheet - Page 185
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MC908JL16CFAE
Manufacturer Part Number
MC908JL16CFAE
Description
Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC908JL16CFAE.pdf
(230 pages)
- Current page: 185 of 230
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Freescale Semiconductor
NOTES:
1. Monitor mode entry method:
2. Affects high voltage entry to monitor mode only (SW1 at position A):
5. See
1 µF
1 µF
2
3
5
DB9
SW1: Position A — High voltage entry (V
SW1: Position B — Reset vector must be blank ($FFFE = $FFFF = $FF)
SW2: Position C — Bus clock = OSC1 ÷ 4
SW2: Position D — Bus clock = OSC1 ÷ 2
Table 17-4
+
+
1
3
4
5
7
8
for V
C1+
C1–
C2+
C2–
TST
MAX232
voltage level requirements.
Bus clock depends on SW2.
Bus clock = OSC1 ÷ 4.
GND
V
V+
CC
V–
16
15
2
10
6
9
TST
V
)
DD
+
+
Figure 16-8. Monitor Mode Circuit
1 µF
MC68HC908JL16 Data Sheet, Rev. 1.1
1 µF
2
74HC125
1
+
3
EXT OSC CONNECTION TO OSC1, WITH OSC2
UNCONNECTED, CAN REPLACE XTAL CIRCUIT.
1 µF
74HC125
6
V
TST
4
V
DD
5
V
EXT OSC (50% DUTY)
DD
XTAL CIRCUIT
10 k
20 pF
1 k
9.8304MHz
(SEE NOTE 2)
8.5 V
10 k
10 k
20 pF
C
D
A
B
OSC1
V
DD
10 k
SW1
SW2
0.1 µF
(SEE NOTE 1)
V
DD
Monitor Module (MON)
10 k
0.1 µF
V
10 k
DD
V
10 k
DD
V
DD
HC908JL16
RST
V
V
OSC1
OSC2
IRQ
PTB0
PTB1
PTB3
PTB2
DD
SS
185
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