AN2575 Freescale Semiconductor / Motorola, AN2575 Datasheet - Page 8

• Manufacturer Part Number: AN2575
• Description: MC68HC908EY16 ESCI LIN Drivers
• Manufacturer: Freescale Semiconductor / Motorola

AN2575/D
Hardware
8
V
LIN
Bat
100 kΩ
6
3
LIN
WAKE
Figure 2. Circuit Diagram of ESCI Baud-Rate Adjustment Application
7
V
Sup
MC33399
8
GND
2
5
8
INH
LT1121
27 kΩ
3
EN
Tx
Rx
The LINkits LIN evaluation board described in AN2573/D
application. A 2 × 16 character LCD has been added using the same interface
as that described in AN2498/D. The complete circuit diagram used here is
shown in
regulator (in this case an LT1121) is required to implement the simple LIN
node. This chip count could be further reduced by using the LIN system base
chip (SBC), MC33689, because this chip incorporates a LIN physical interface
and a voltage regulator. The other components required are the LCD module
and a few resistors and decoupling capacitors (not shown).
1. See the
cited here.
RESET
2
4
1
Freescale Semiconductor, Inc.
1
For More Information On This Product,
ICGTR/ICGMR
47 kΩ
References
5 V
SELECT
MC68HC908EY16 ESCI LIN Drivers
Figure
47 kΩ
0.1 µF
Go to: www.freescale.com
100 kΩ
5 V
2. Apart from the MCU and the MC33399, only a 5-volt
V
DD
16
17
13
23
24
9
section for a list of helpful documents, including the application notes
5 V
B5
IRQ
RESET
E0/Tx
E1/Rx
D1
27
26
25
MC68HC908EY16
V
V
V
V
V
V
28
29
30
SS
SSA
REFL
DD
DDA
REFH
TRIM ADJUST
1
A2
32
A3
A5 20
A6
C0
C1
B2
B1
B0
C2
D0
47 kΩ
47 kΩ
19
22
21
12
14
18
8
15
5 V
1
MCLK
Q12
11
MC74HC4040
11
12
13
14
4
5
6
R/W
RS
E
D4
D5
D6
D7
16
8
1
5 V
is used for this
2 × 16 CHARACTER
C
LCD MODULE
DOT-MATRIX
10
V
2
DD
MOTOROLA
CONTRAST
8
10 kΩ
V
3
LCD
0
7
4-MHz
OSC
14
1
V
SS