8XMODE [7:0] = 0X00 4XMODE [7:0] = 0X
參數(shù)資料
型號(hào): XR16M598IQ100-F
廠商: Exar Corporation
文件頁(yè)數(shù): 2/58頁(yè)
文件大?。?/td> 0K
描述: IC UART FIFO 16B OCTAL 100QFP
標(biāo)準(zhǔn)包裝: 66
特點(diǎn): *
通道數(shù): 8
FIFO's: 16 字節(jié)
規(guī)程: RS485
電源電壓: 1.62 V ~ 3.63 V
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:
安裝類型: 表面貼裝
封裝/外殼: 100-BQFP
供應(yīng)商設(shè)備封裝: 100-QFP(14x20)
包裝: 托盤
8XMODE [7:0] = 0X00
4XMODE [7:0] = 0X00
Required Divisor (decimal) = (XTAL1 clock frequency / prescaler) / (serial data rate x 16)
8XMODE [7:0] = 0XFF
4XMODE [7:0] = 0X00
Required Divisor (decimal) = (XTAL1 clock frequency / prescaler / (serial data rate x 8)
8XMODE [7:0] = 0X00
4XMODE [7:0] = 0XFF
Required Divisor (decimal) = (XTAL1 clock frequency / prescaler / (serial data rate x 4)
8XMODE [7:0] = 0XFF
4XMODE [7:0] = 0XFF
Reserved.
ROUND( (Required Divisor - TRUNC(Required Divisor) )*16)/16 + TRUNC(Required Divisor), where
DLM = TRUNC(Required Divisor) >> 8
DLL = TRUNC(Required Divisor) & 0xFF
DLD = ROUND( (Required Divisor-TRUNC(Required Divisor) )*16)
XR16M598
10
1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 16-BYTE FIFO
REV. 1.0.0
The closest divisor that is obtainable in the 598 can be calculated using the following formula:
In the formulas above, please note that:
TRUNC (N) = Integer Part of N. For example, TRUNC (5.6) = 5.
ROUND (N) = N rounded towards the closest integer. For example, ROUND (7.3) = 7 and ROUND (9.9) = 10.
A >> B indicates right shifting the value ’A’ by ’B’ number of bits. For example, 0x78A3 >> 8 = 0x0078.
FIGURE 4. BAUD RATE GENERATOR
XTAL1
XTAL2
Crystal
Osc/
Buffer
MCR Bit-7=0
(default)
MCR Bit-7=1
DLL, DLM and DLD
Registers
Prescaler
Divide by 1
Prescaler
Divide by 4
16X or 8X or 4X
Sampling
Rate Clock
to Transmitter
and Receiver
To Other
Channels
Fractional Baud
Rate Generator
Logic
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