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 " />
參數(shù)資料
型號(hào): ST16C650AIQ48TR-F
廠商: Exar Corporation
文件頁(yè)數(shù): 3/50頁(yè)
文件大小: 0K
描述: IC UART FIFO 32B 48TQFP
標(biāo)準(zhǔn)包裝: 1,500
特點(diǎn): *
通道數(shù): 1,UART
FIFO's: 32 字節(jié)
規(guī)程: 打印機(jī),RS232,RS422,RS485
電源電壓: 2.9 V ~ 5.5 V
帶并行端口:
帶IrDA 編碼器/解碼器:
帶故障啟動(dòng)位檢測(cè)功能:
帶調(diào)制解調(diào)器控制功能:
帶CMOS:
安裝類(lèi)型: 表面貼裝
封裝/外殼: 48-TQFP
供應(yīng)商設(shè)備封裝: 48-TQFP(7x7)
包裝: 帶卷 (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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