FIGURE 10. SPI FIFO READ SCLK D7 D6 D5 D4 D3 D2 D1 D0 las" />
參數(shù)資料
型號(hào): XR20M1170L24-0A-EB
廠商: Exar Corporation
文件頁數(shù): 2/56頁
文件大?。?/td> 0K
描述: EVAL BOARD FOR XR20M1170 24QFN
標(biāo)準(zhǔn)包裝: 1
主要目的: 接口,UART
嵌入式:
已用 IC / 零件: XR20M1170
次要屬性: I²C & SPI 接口
已供物品:
其它名稱: 1016-1620
XR20M1170L24-0A-EB-ND
FIGURE 10. SPI FIFO READ
SCLK
D7 D6 D5 D4 D3 D2 D1 D0
last bit
R/W A3
A2
A1
A0
0
0X
XR20M1170
10
I2C/SPI UART WITH 64-BYTE FIFO
REV. 1.1.0
After the last read or write transaction, the SPI master will set the SCL signal back to its idle state (LOW).
2.2
Device Reset
The RESET# input resets the internal registers and the serial interface outputs in the UART to its default state
(see Table 16). An active low pulse of longer than 40 ns duration will be required to activate the reset function
in the device.
2.3
Internal Registers
The M1170 has a set of enhanced registers for control, monitoring and data loading and unloading. The
configuration register set is compatible to the industry standard ST16C550. These registers function as data
holding registers (THR/RHR), interrupt status and control registers (ISR/IER), a FIFO control register (FCR),
receive line status and control registers (LSR/LCR), modem status and control registers (MSR/MCR),
programmable data rate (clock) divisor registers (DLL/DLM/DLD), and a user accessible Scratchpad Register
(SPR).
Beyond the general 16C550 features and capabilities, the M1170 offers enhanced feature registers (EFR, Xon/
Xoff 1, Xon/Xoff 2, TCR, TLR, TXLVL, RXLVL, IODir, IOState, IOIntEna, IOControl, EFCR and DLD) that
provide automatic RTS and CTS hardware flow control, Xon/Xoff software flow control, automatic RS-485 half-
duplex direction output enable/disable, TX and RX FIFO level counters, and programmable FIFO trigger level
2.4
IRQ# Output
The IRQ# interrupt output changes according to the operating mode and enhanced features setup. Table 4
and 5 summarize the operating behavior for the transmitter and receiver. Also see Figures 21 through 35.
TABLE 4: IRQ# PIN OPERATION FOR TRANSMITTER
Auto RS485
Mode
FCR BIT-0 = 0
(FIFO DISABLED)
FCR BIT-0 = 1 (FIFO ENABLED)
IRQ# Pin
NO
HIGH = a byte in THR
LOW = THR empty
HIGH = FIFO above trigger level
LOW = FIFO below trigger level or FIFO empty
IRQ# Pin
YES
HIGH = a byte in THR
LOW = transmitter empty
HIGH = FIFO above trigger level
LOW = FIFO below trigger level or transmitter empty
TABLE 5: IRQ# PIN OPERATION FOR RECEIVER
FCR BIT-0 = 0
(FIFO DISABLED)
FCR BIT-0 = 1
(FIFO ENABLED)
IRQ# Pin
HIGH = no data
LOW = 1 byte
HIGH = FIFO below trigger level
LOW = FIFO above trigger level
相關(guān)PDF資料
PDF描述
GSM08DTAN CONN EDGECARD 16POS R/A .156 SLD
202D274-3/42-0 BOOT MOLDED
50PX22MEFC5X11 CAP ALUM 22UF 50V 20% RADIAL
SDR0302-271KL INDUCTOR POWER 270UH 0.15A 0302
V150C8C100B3 CONVERTER MOD DC/DC 8V 100W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR20M1170L24-0B-EB 功能描述:UART 接口集成電路 Supports M1170 28pin QFN, SPI 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
XR20M1170L28-0A-EB 功能描述:UART 接口集成電路 Supports M1170 28pin QFN, I2C 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
XR20M1170L28-0B-EB 功能描述:界面開發(fā)工具 Supports M1170 28pin QFN, SPI Interface RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
XR20M1172 制造商:EXAR 制造商全稱:EXAR 功能描述:TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO
XR20M1172_09 制造商:EXAR 制造商全稱:EXAR 功能描述:TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO