參數(shù)資料
型號(hào): MAX3109ETJ+T
廠商: Maxim Integrated Products
文件頁數(shù): 16/66頁
文件大?。?/td> 0K
描述: IC UART
產(chǎn)品培訓(xùn)模塊: Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 2,500
系列: *
Dual Serial UART with 128-Word FIFOs
MAX3109
23
Maxim Integrated
Both portions of the delay are dependent on the UART’s
clock. When the fractional divider is not used, the intrinsic
trigger delay, tTRIG, is bounded by the following limits:
TRIG
56
t
UARTCLK
where UARTCLK is the baud-rate divider output. The
reference point is the time when the trigger command is
received by the MAX3109. This occurs on the final (i.e.,
the 16th) SPI clock’s low-to-high transition (Figure 12).
In I2C mode, this occurs on the final (i.e., the 8th) SCL
low-to-high transition.
When the fractional baud-rate generator is used, the
random portion is larger than one UART clock period.
Synchronization Accuracy
When synchronizing multiple UART transmitters, the out-
put skew of the TX_ transmitter outputs is based on the
triggering delays of each UART (Figure 13). This skew
has a baud rate dependent component, similar to the
Figure 12. Single Transmitter Trigger Accuracy
Figure 13. Multiple Transmitter Synchronization Accuracy
UNCERTAINTY
INTERVAL
tTRIG_MIN
tTRIG_MAX
TX_
SCLK
tTX1_MAX
tTRIGSKEW
tTX1_MIN
tTX0_MAX
tTX0_MIN
TX0
TX1
SCLK
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