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參數(shù)資料
| 型號： | XR16M698IQ-0A-EVB |
| 廠商： | Exar Corporation |
| 文件頁數(shù)： | 27/58頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVAL BOARD FOR M698-A 100QFP |
| 標準包裝： | 1 |
| 系列： | * |
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XR16M698
33
REV. 1.0.0
1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 32-BYTE FIFO
NOTE: MCR bits 2 and 3 (OP1 and OP2 outputs) are not available in the XR16M698. They are present for 16C550 compat-
ibility during Internal loopback, see
4.0 INTERNAL REGISTER DESCRIPTIONS
4.1
Receive Holding Register (RHR) - Read Only
4.2
Transmit Holding Register (THR) - Write Only
4.3
Interrupt Enable Register (IER) - Read/Write
The Interrupt Enable Register (IER) masks the interrupts from receive data ready, transmit empty, line status
and modem status registers. These interrupts are reported in the Interrupt Status Register (ISR) and also
encoded in INT (INT0-INT3) register in the Device Configuration Registers.
4.3.1
IER versus Receive FIFO Interrupt Mode Operation
When the receive FIFO (FCR BIT-0 = a logic 1) and receive interrupts (IER BIT-0 = logic 1) are enabled, the
RHR interrupts (see ISR bits 3 and 4) status will reflect the following:
A.
The receive data available interrupts are issued to the host when the FIFO has reached the programmed
trigger level. It will be cleared when the FIFO drops below the programmed trigger level.
B.
FIFO level will be reflected in the ISR register when the FIFO trigger level is reached. Both the ISR register
status bit and the interrupt will be cleared when the FIFO drops below the trigger level.
C.
The receive data ready bit (LSR BIT-0) is set as soon as a character is transferred from the shift register to
the receive FIFO. It is reset when the FIFO is empty.
4.3.2
IER versus Receive/Transmit FIFO Polled Mode Operation
When FCR BIT-0 equals a logic 1 for FIFO enable; resetting IER bits 3:0 enables the XR16M698 in the FIFO
polled mode of operation. Since the receiver and transmitter have separate bits in the LSR either can be used
in the polled mode by selecting respective transmit or receive control bit(s).
A.
LSR BIT-0 indicates there is data in RHR (non-FIFO mode) or RX FIFO (FIFO mode).
B.
LSR BIT-1 indicates an overrun error has occurred and that data in the FIFO may not be valid.
C.
LSR BIT 2-4 provides the type of receive data errors encountered for the data byte in RHR, if any.
D.
LSR BIT-5 indicates THR (non-FIFO mode) or TX FIFO (FIFO mode) is empty.
E.
LSR BIT-6 indicates when both the transmit FIFO and TSR are empty.
F.
LSR BIT-7 indicates a data error in at least one character in the RX FIFO.
1 0 1 1
Rsvd
R
0
1 1 0 0
XCHAR
R
0
TX Xon
Indicator
TX Xoff
Indicator
Xon Det.
Indicator
Xoff Det.
Indicator
Self clear
after read
1 1 0 0
XOFF1
W
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
1 1 0 1
XOFF2
W
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
1 1 1 0
XON1
W
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
1 1 1 1
XON2
W
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
TABLE 13: UART CHANNEL CONFIGURATION REGISTERS DESCRIPTION. SHADED BITS ARE ENABLED BY EFR BIT-4.
ADDRESS
A3-A0
REG
NAME
READ/
WRITE
BIT-7
BIT-6
BIT-5
BIT-4
BIT-3
BIT-2
BIT-1
BIT-0
COMMENT
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| XR16M698IQ-0B-EVB | 功能描述:界面開發(fā)工具 Eval Board for XR16M698IQ-0B RoHS:否 制造商:Bourns 產品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| XR16M698IQ100 | 制造商:EXAR 制造商全稱:EXAR 功能描述:1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 32-BYTE FIFO |
| XR16M698IQ100-F | 功能描述:UART 接口集成電路 8-ch 32-byte 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 |
| XR16M698IQ100TR-F | 制造商:Exar Corporation 功能描述:UART 8-CH 32Byte FIFO 1.8V/2.5V/3.3V 100-Pin PQFP T/R 制造商:Exar Corporation 功能描述:XR16M698IQ100TR-F |
| XR16M752 | 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE DUART WITH 64-BYTE FIFO |
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