MC68HC908GR4 MOTOROLA [Motorola, Inc], MC68HC908GR4 Datasheet - Page 191
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MC68HC908GR4
Manufacturer Part Number
MC68HC908GR4
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908GR4.pdf
(408 pages)
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MC68HC908GR8 — Rev 4.0
MOTOROLA
DB-25
Notes:
10 F
10 F
2
3
7
1.
2.
+
+
SW2, SW3, and SW4: Position C — Enter monitor mode using external oscillator.
SW2, SW3, and SW4: Position D — Enter monitor mode using external XTAL and internal PLL.
See
1
3
4
2
5
6
. Monitor Mode Signal Requirements and Options
MC145407
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 15-1. Monitor Mode Circuit
20
18
17
19
16
15
+
+
10 F
10 F
32.768 kHz XTAL
Go to: www.freescale.com
Monitor ROM (MON)
6–30 pF
V
1
2
6
4
7
DD
MC74HC125
(SEE NOTE 3)
6–30 pF
330 k
10 k
for IRQ voltage level requirements.
5
14
3
V
D
C
C
C
D
V
TST
D
DD
SW2
(SEE NOTE 2)
SW4
(SEE NOTE 2)
SW3
(SEE NOTES 2
0.033 F
10 k
0.1 F
0.1 F
AND 3)
10 k
10 k
10 k
10 k
V
V
DDA
V
V
DD
DD
DD
CGMXFC
V
PTA1
V
RST
IRQ
OSC1
OSC2
V
V
V
V
PTA0
PTB0
PTB1
DDA
SS
DD
DDAD
SSAD
SSA
68HC08
RESET VECTORS
/V
/V
REFL
REFH
Functional Description
$FFFE
$FFFF
Monitor ROM (MON)
Technical Data
191
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