參數(shù)資料
型號: XR16C854CJ
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, PQCC68
封裝: PLASTIC, LCC-68
文件頁數(shù): 28/51頁
文件大小: 476K
代理商: XR16C854CJ
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PDF資料
PDF描述
XR16C854CQ QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
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XR16C854DCV QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
XR16C854DIV QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
XR16C854IJ QUAD UART WITH RX/TX FIFO COUNTERS,128-BYTE FIFO
相關代理商/技術參數(shù)
參數(shù)描述
XR16C854CJ-0A-EVB 功能描述:UART 接口集成電路 Supports C854 68 ld PLCC, ISA Interface 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
XR16C854CJ-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
XR16C854CJTR-F 制造商:Exar Corporation 功能描述:XR16C854CJTR-F
XR16C854CQ 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
XR16C854CQ-0A-EVB 功能描述:UART 接口集成電路 Supports C854 100 ld QFP, ISA Interface 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