參數資料
型號: ST16C650A
廠商: Exar Corporation
英文描述: 2.90V TO 5.5V UART WITH 32-BYTE FIFO
中文描述: 2.90V至5.5V UART的32字節(jié)FIFO
文件頁數: 12/53頁
文件大?。?/td> 666K
代理商: ST16C650A
ST16C650A
2.90V TO 5.5V UART WITH 32-BYTE FIFO
á
REV. 5.0.0
12
2.6
The output function of interrupt, INT, output changes according to the operating bus type and various factors.
Table 3
summarizes its behavior in Intel and PC mode of operation. Multiple interrupts can be wire-OR’ed. This
is accomplished by setting MCR bit-5 to a logic 1 and connecting a 1K
to 10K
resistor between this pin and
ground to provide an acceptable logic 0 level.
Interrupt
T
ABLE
3: I
NTERRUPT
O
UTPUT
(INT
AND
IRQA) F
UNCTIONS
SEL I
NPUT
S3 I
NPUT
MCR
BIT
-5
(INT
TYPE
SELECT
)
MCR
BIT
-3
(IRQ
N
ENABLE
)
I
NTERRUPT
O
UTPUT
(INT
OR
IRQA)
Intel Bus Mode
1
don’t care
0
don’t care
INT is logic 0 for inactive interrupt.
INT is logic 1 for active interrupt (active high)
1
don’t care
1
don’t care
INT is three-state for inactive interrupt
INT is logic 1 for active interrupt (open source). Requires a 1K-
10K
resistor to GND.
PC Mode
0
0
don’t care
don’t care
IRQA is three-state. Either IRQB or IRQC is used, see
Table 1
.
0
1
don’t care
0
IRQA is three-state.
0
1
0
1
IRQA is logic 0 for inactive interrupt.
IRQA is logic 1 for active interrupt (active high).
0
1
1
1
IRQA is three-state for no interrupt.
IRQA is logic 1 for active interrupt (active high, open source).
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