參數(shù)資料
型號(hào): XR16L651IM-F
廠商: Exar Corporation
文件頁(yè)數(shù): 4/56頁(yè)
文件大?。?/td> 0K
描述: IC UART FIFO 32B 48TQFP
標(biāo)準(zhǔn)包裝: 250
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: 2.25 V ~ 5.5 V
帶并行端口:
帶自動(dòng)流量控制功能:
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: 托盤(pán)
XR16L651
á
2.25V TO 5.5V UART WITH 32-BYTE FIFO
REV. 1.3.0
12
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, Motorola 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, INT# AND IRQA) FUNCTIONS
IM# INPUT
(INTEL/
MOTOROLA)
PCMODE#
INPUT
S3 INPUT
MCR BIT-5
(INT TYPE
SELECT
)
MCR BIT-3
(IRQN
ENABLE
)
INTERRUPT OUTPUT (INT, INT# OR IRQA)
Intel Bus Mode
0
1
don’t care
0
don’t care
INT is logic 0 for inactive interrupt.
INT is logic 1 for active interrupt (active high)
0
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.
Motorola Bus Mode
1
don’t care
0
don’t care
INT# is three-state for inactive interrupt.
INT# is logic 0 for active interrupt (active low, open
drain). Requires a 1K-10K
resistor to VCC.
1
don’t care
1
don’t care
INT# is three-state.
PC Mode
0
don’t care
IRQA is three-state. Either IRQB or IRQC is used,
0
1
don’t care
0
IRQA is three-state.
0
0101
IRQA is logic 0 for inactive interrupt.
IRQA is logic 1 for active interrupt (active high).
0
0111
IRQA is three-state for no interrupt.
IRQA is logic 1 for active interrupt (active high,
open source).
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