REV. 1.0.0 1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 16-BYTE FIFO . TABLE
參數(shù)資料
型號(hào)： XR16M598IQ100-F
廠商： Exar Corporation
文件頁(yè)數(shù)： 7/58頁(yè)
文件大小： 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： 是
帶IrDA 編碼器/解碼器： 是
帶故障啟動(dòng)位檢測(cè)功能： 是
帶調(diào)制解調(diào)器控制功能： 是
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(pán)
XR16M598
15
REV. 1.0.0
1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 16-BYTE FIFO
.
TABLE 6: TRANSMIT AND RECEIVE HOLDING REGISTER LOCATIONS, 16C550 COMPATIBLE
THR and RHR Address Locations For CH0 to CH7 (16C550 Compatible)
CH0 0x00 Write THR
CH0 0x00 Read RHR
CH1 0x10 Write THR
CH1 0x10 Read RHR
CH2 0x20 Write THR
CH2 0x20 Read RHR
CH3 0x30 Write THR
CH3 0x30 Read RHR
CH4 0x40 Write THR
CH4 0x40 Read RHR
CH5 0x50 Write THR
CH5 0x50 Read RHR
CH6 0x60 Write THR
CH6 0x60 Read RHR
CH7 0x70 Write THR
CH7 0x70 Read RHR
THRRHR1
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
2.10
Auto RTS/DTR Hardware Flow Control Operation
Automatic RTS/DTR flow control is used to prevent data overrun to the local receiver FIFO. The RTS#/DTR#
output pin is used to request remote unit to suspend/resume data transmission. The flow control features are
individually selected to fit specific application requirement (see Figure 9):
Select RTS (and CTS) or DTR (and DSR) through MCR bit-2.
Enable auto RTS/DTR flow control using EFR bit-6.
The auto RTS or auto DTR function must be started by asserting the RTS# or DTR# output pin (MCR bit-1 or
bit-0 to a logic 1, respectively) after it is enabled.
With the Auto RTS function enabled, the RTS# output pin will not be de-asserted (HIGH) when the receive
FIFO reaches the programmed trigger level, but will be de-asserted when the FIFO reaches the next trigger
level (See Table 15). The RTS# output pin will be asserted (LOW) again after the FIFO is unloaded to the next
trigger level below the programmed trigger level.
However, even under these conditions, the 598 will continue to accept data until the receive FIFO is full if the
remote UART transmitter continues to send data.
If used, enable RTS/DTR interrupt through IER bit-6 (after setting EFR bit-4). The UART issues an interrupt
when the RTS#/DTR# pin makes a transition: ISR bit-5 will be set to 1.
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