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參數(shù)資料
| 型號： | L9942 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Super Smart Motor Bridge Driver(電機(jī)橋驅(qū)動(dòng)器) |
| 中文描述： | 超級智能電機(jī)橋式驅(qū)動(dòng)器（電機(jī)橋驅(qū)動(dòng)器） |
| 文件頁數(shù)： | 15/21頁 |
| 文件大?。?/td> | 160K |
| 代理商： | L9942 |
If BUSIE is cleared PA0 and PA1 operate as normal I/O pins. IF BUSIE is set the input schmitt trigger of
PA1 is connected with data input of the CAN controller. The data output of the CAN controller is con-
nected with the output driver of PA0 as well. For this mode of operation PA0 has to be programmed as
output, PA1 as input. In this operation mode port A data register bit 0 is connected with line interface
open drain output buffer. ThereforeBUSOUT is directlycontrolled by port A data register bit 0.
Pin PA2 may also be used as external input for TIMER1. For this purpose PA2 has to be programmed
as input (with or without pull up / interrupt) and bit TEST of oscillator control register OSCR has to be
cleared.
With BUSIE = 1 bitPA1 has to be configuredas Input, bit PA0 as output.
MICROCONTROLLER SECTION
(continued)
BUSIE
PA0/CANOUT
PA1/CANIN
Output
Input
Line
Interface
CAN
BUSIN
PID
DR
PID
DR
PID = Port Input Data
DR = Data Register
BUSOUT
PA2
TIMER1
PID
DR
Input
BUSIE = 0 : Port A Normal operation
CAN connected with line interface
BUSOUT connected with PA0/DR
BUSIE = 1 : Bits 0,1 of Port A = CAN
Sel
0
1
MUX
Sel
0
1
MUX
PA3
PID
DR
Sel
MUX
0
1
GATE
TEST
Sel
MUX
0
1
Figure 7. Signals of RCoscillator count logic.
L9942
15/21
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