參數(shù)資料
型號： SC16C752IB48,151
廠商： NXP Semiconductors
文件頁數(shù)： 17/47頁
文件大?。?/td> 0K
描述： IC UART DUAL W/FIFO 48-LQFP
標(biāo)準(zhǔn)包裝： 250
通道數(shù)： 2，DUART
FIFO's： 64 字節(jié)
電源電壓： 2.5V，3.3V，5V
帶自動流量控制功能： 是
帶故障啟動位檢測功能： 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： 48-LQFP
供應(yīng)商設(shè)備封裝： 48-LQFP（7x7）
包裝： 托盤
其它名稱： 568-3289
935270055151
SC16C752IB48-S
Philips Semiconductors
SC16C752
Dual UART with 64-byte FIFO
Product data
Rev. 04 — 20 June 2003
24 of 47
9397 750 11635
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
Remark: The three error bits (parity, framing, break) may not be updated correctly in
the rst read of the LSR when the input clock (XTAL1) is running faster than 36 MHz.
However, the second read is always correct. It is strongly recommended that when
using this device with a clock faster than 36 MHz, that the LSR be read twice and only
the second read be used for decision making. All other bits in the LSR are correct on
all reads.
7.6 Modem control register (MCR)
The MCR controls the interface with the mode, data set, or peripheral device that is
emulating the modem. Table 14 shows modem control register bit settings.
[1]
MCR[7:5] can only be modied when EFR[4] is set, i.e., EFR[4] is a write enable.
Table 14:
Modem Control Register bits description
Bit
Symbol
Description
7
MCR[7] [1]
Clock select.
Logic 0 = Divide-by-1 clock input.
Logic 1 = Divide-by-4 clock input.
6
MCR[6] [1]
TCR and TLR enable.
Logic 0 = no action.
Logic 1 = Enable access to the TCR and TLR registers.
5
MCR[5] [1]
Xon Any.
Logic 0 = Disable Xon Any function.
Logic 1 = Enable Xon Any function.
4
MCR[4]
Enable loop-back.
Logic 0 = Normal operating mode.
Logic 1 = Enable local loop-back mode (internal). In this mode the
MCR[3:0] signals are looped back into MSR[7:4] and the TX output
is looped back to the RX input internally.
3
MCR[3]
IRQ enable OP.
Logic0=Forces INTA-INTB outputs to the 3-State mode and OP
output to HIGH state.
Logic1=Forces the INTA-INTB outputs to the active state and OP
output to LOW state. In loop-back mode, controls MSR[7].
2
MCR[2]
FIFO Ready enable.
Logic 0 = Disable the FIFO Rdy register.
Logic 1 = Enable the FIFO Rdy register.
In loop-back mode, controls MSR[6].
1
MCR[1]
RTS
Logic 0 = Force RTS output to inactive (HIGH).
Logic 1 = Force RTS output to active (LOW).
In loop-back mode, controls MSR[4]. If Auto-RTS is enabled, the
RTS output is controlled by hardware ow control.
0
MCR[0]
DTR
Logic 0 = Force DTR output to inactive (HIGH).
Logic 1 = Force DTR output to active (LOW).
In loop-back mode, controls MSR[5].
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