參數(shù)資料
型號(hào)： 935270053512
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 1 CHANNEL(S), 3M bps, SERIAL COMM CONTROLLER, PQCC44
封裝： PLASTIC, MS-018, SOT-187-2, LCC-44
文件頁(yè)數(shù)： 20/48頁(yè)
文件大小： 657K
代理商： 935270053512
Philips Semiconductors
SC16C750
Universal Asynchronous Receiver/Transmitter (UART) with 64-byte FIFO
Product data
Rev. 03 — 14 March 2003
27 of 45
9397 750 11203
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
[1]
Whenever any MSR bit 0-3 is set to logic 1, a Modem Status Interrupt will be generated.
7.9 Scratchpad Register (SPR)
The SC16C750 provides a temporary data register to store 8 bits of user information.
7.10 Enhanced Feature Register (EFR)
Enhanced features are enabled or disabled using this register.
1
MSR[1]
DSR [1]
Logic 0 = No DSR change (normal default condition).
Logic1=The DSR input to the SC16C750 has changed state since
the last time it was read. A modem Status Interrupt will be generated.
0
MSR[0]
CTS [1]
Logic 0 = No CTS change (normal default condition).
Logic 1 = The CTS input to the SC16C750 has changed state since
the last time it was read. A modem Status Interrupt will be generated.
Table 20:
Modem Status Register bits description…continued
Bit
Symbol
Description
Table 21:
Enhanced Feature Register bits description
Bit
Symbol
Description
7
EFR[7]
Automatic CTS ow control.
Logic0=Automatic CTS ow control is disabled (normal default
condition).
Logic 1 = Enable Automatic CTS ow control. Transmission will stop
when CTS goes to a logical 1. Transmission will resume when the CTS
pin returns to a logical 0.
6
EFR[6]
Automatic RTS ow control. Automatic RTS may be used for hardware ow
control by enabling EFR[6]. When Auto-RTS is selected, an interrupt will
be generated when the receive FIFO is lled to the programmed trigger
level and RTS will go to a logic 1 at the next trigger level. RTS will return to
a logic 0 when data is unloaded below the next lower trigger level
(programmed trigger level 1). The state of this register bit changes with the
status of the hardware ow control. RTS functions normally when
hardware ow control is disabled.
0 = Automatic RTS ow control is disabled (normal default condition).
1 = Enable Automatic RTS ow control.
5-0
EFR[5-0] Reserved; set to 0.
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