參數(shù)資料
型號(hào)： XR16C854DIV
廠商： EXAR CORP
元件分類： 微控制器/微處理器
英文描述： QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
中文描述： 4 CHANNEL(S), 2M bps, SERIAL COMM CONTROLLER, PQFP64
封裝： 10 X 10 MM, 1.40 MM HEIGHT, TQFP-64
文件頁(yè)數(shù)： 28/51頁(yè)
文件大?。?/td> 476K
代理商： XR16C854DIV
XR16C854
28
Rev. 1.00P
FCR BIT 6-7: (logic 0 or cleared is the default condi-
tion, RX trigger level =8)
These bits are used to set the trigger level for the
receiver FIFO interrupt. The FCTR Bits 4-5 selects
one of the following table.
TRIGGER TABLE-A (Receive)
Default setting after reset ST16C550 mode
BIT-7
BIT-6
FIFO trigger level
0
0
1
1
0
1
0
1
1
4
8
14
TRIGGER TABLE-B (Receive)
BIT-7
BIT-6
FIFO trigger level
0
0
1
1
0
1
0
1
8
16
24
28
TRIGGER TABLE-C (Receive)
BIT-7
BIT-6
FIFO trigger level
0
0
1
1
0
1
0
1
8
16
56
60
TRIGGER TABLE-D (Receive)
BIT-7
BIT-6
FIFO trigger level
X
X
User programmable
Trigger levels
Interrupt Status Register (ISR)
The 854 provides six levels of prioritized interrupts to
minimize external software interaction. The Interrupt
Status Register (ISR) provides the user with six inter-
rupt status bits. Performing a read cycle on the ISR will
provide the user with the highest pending interrupt
level to be serviced. No other interrupts are acknowl-
edged until the pending interrupt is serviced. When-
ever the interrupt status register is read, the interrupt
status is cleared. However it should be noted that only
the current pending interrupt is cleared by the read. A
lower level interrupt may be seen after rereading the
interrupt status bits. The Interrupt Source Table 7
(below) shows the data values (bit 0-5) for the six
prioritized interrupt levels and the interrupt sources
associated with each of these interrupt levels:
相關(guān)PDF資料
PDF描述
XR16C854IJ QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
XR16C854IQ QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
XR16C854IV APH97-3108A20-29S
XR16C854D 2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
XR16C864 Quad UART with RX/TX FIFO Counters and 128-byte FIFO(四通用異步接收器/發(fā)送器（帶RX/TX 先進(jìn)先出計(jì)數(shù)器和128字節(jié)先進(jìn)先出）)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR16C854DIV-F 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR16C854DIV-F 制造商:Exar Corporation 功能描述:IC QUAD UART 2MBPS 5.5V 64-LQFP
XR16C854DIVTR-F 制造商:Exar Corporation 功能描述:UART 4-CH 128Byte FIFO 3.3V/5V 64-Pin LQFP T/R 制造商:Exar Corporation 功能描述:XR16C854DIVTR-F
XR16C854IJ 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
XR16C854IJ-F 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
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