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參數資料
| 型號： | 33661 |
| 廠商： | Motorola, Inc. |
| 英文描述： | LIN Enhanced Physical Interface |
| 中文描述： | 林增強型物理接口 |
| 文件頁數： | 12/20頁 |
| 文件大?。?/td> | 377K |
| 代理商： | 33661 |
33661
12
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
Figure 13. Mode Transitions
Table 1. Explanation of Mode Transitions
Unpowered
Sleep
Awake
Wait Slow
Slow
Normal
Fast
Fast
TXD HIGH and EN LOW > t
1
(
35
μ
s)
TXD HIGH and EN LOW to
HIGH
Bus or WAKE terminal
wake-up
TXD HIGH and EN LOW to HIGH
TXD LOW and EN LOW to HIGH
TXD LOW and EN
LOW to HIGH
TXD HIGH and EN LOW > t
1
(35
μ
s)
TXD HIGH
EN LOW for t
1
< 5.0
μ
s, then HIGH
Toggle function
EN LOW for t
1
< 5.0
μ
s,
then HIGH
Toggle function
EN LOW for t
1
< 5.0
μ
s,
then HIGH
EN LOW for t
1
< 5.0
μ
s,
then HIGH
Note
See Table 1 for explanation of mode transitions.
Mode
Bus
INH
EN
TXD
RXD
Sleep
Recessive state, driver off.
20
μ
A pullup current source.
OFF
LOW
X
High impedance. HIGH if external
pullup to V
DD.
Awake
Recessive state, driver off.
30 k
pullup active.
ON
LOW
X
Low. If external pullup, HIGH-to-
LOW transition reports wake-up.
Normal
Driver active. 30 k
pullup active.
Slew rate normal (20 kbps).
ON
HIGH
HIGH to enter normal mode. Once in
normal mode: LOW to drive bus in
dominant, HIGH to drive bus in
recessive.
Report bus level:
Low bus dominant
High bus recessive
Wait
Slow
Recessive state. Driver off.
30 k
pullup active.
ON
HIGH
LOW
HIGH
Slow
Driver active. 30 k
pullup active.
Slew rate slow (10 kbps).
ON
HIGH
LOW to enter slow mode. Once in
slow mode: LOW to drive bus in
dominant, HIGH to drive bus in
recessive.
Report bus level:
Low bus dominant
High bus recessive
Fast
Driver active. 30 k
pullup active.
Slew rate slow (>100 kbps).
ON
HIGH
LOW to drive bus in dominant, HIGH
to drive bus in recessive.
Report bus level:
Low bus dominant
High bus recessive
X = Don’t care.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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