参数资料
型号: ST16C650ACJ44TR-F
厂商: Exar Corporation
文件页数: 3/50页
文件大小: 0K
描述: IC UART FIFO 32B 44PLCC
标准包装: 500
特点: *
通道数: 1,UART
FIFO's: 32 字节
规程: 打印机,RS232,RS422,RS485
电源电压: 2.9 V ~ 5.5 V
带并行端口:
带IrDA 编码器/解码器:
带故障启动位检测功能:
带调制解调器控制功能:
带CMOS:
安装类型: 表面贴装
封装/外壳: 44-LCC(J 形引线)
供应商设备封装: 44-PLCC(16.59x16.59)
包装: 带卷 (TR)
ST16C650A
11
REV. 5.0.3
2.90V TO 5.5V UART WITH 32-BYTE FIFO
2.6
Interrupt
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.
TABLE 3: INTERRUPT OUTPUT (INT AND IRQA) FUNCTIONS
SEL INPUT
S3 INPUT
MCR BIT-5
(INT TYPE
SELECT
)
MCR BIT-3
(IRQN
ENABLE
)
INTERRUPT OUTPUT (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
don’t care
IRQA is three-state. Either IRQB or IRQC is used, see
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
IRQA is three-state for no interrupt.
IRQA is logic 1 for active interrupt (active high, open source).
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