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| 型號(hào)： | SC28L92A1B-S |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PQFP44 |
| 封裝： | 10 X 10 MM, 1.75 MM HEIGHT, PLASTIC, SOT-307-2, QFP-44 |
| 文件頁(yè)數(shù)： | 30/73頁(yè) |
| 文件大?。?/td> | 336K |
| 代理商： | SC28L92A1B-S |
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SC28L92_7
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 07 — 19 December 2007
36 of 73
NXP Semiconductors
SC28L92
3.3 V/5.0 V Dual Universal Asynchronous Receiver/Transmitter
7.3.3.2
Command Register channel B (CRB)
CRB is a register used to supply commands to channel B. Multiple commands can be
specied in a single write to CRB as long as the commands are non-conicting, e.g., the
enable transmitter and reset transmitter commands cannot be specied in a single
command word.
The bit denitions for this register are identical to the bit denitions for CRA, with the
exception of miscellaneous commands 0xE and 0xF which are used for Power-down
mode. These two commands are not used in CRB. All other control actions that apply to
CRA also apply to CRB.
0110
Start break. Forces the TxDA output LOW (spacing). If the transmitter is empty the
start of the break condition will be delayed up to two bit times. If the transmitter is
active the break begins when transmission of the character is completed. If a
character is in the Tx FIFO, the start of the break will be delayed until that
character, or any other loaded subsequently are transmitted. The transmitter must
be enabled for this command to be accepted.
0111
Stop break. The TxDA line will go HIGH (marking) within two bit times. TxDA will
remain HIGH for one bit time before the next character, if any, is transmitted.
1000
Assert RTSN. Causes the RTSN output to be asserted (LOW).
1001
Negate RTSN. Causes the RTSN output to be negated (HIGH).
1010
Set time-out mode on. The receiver in this channel will restart the C/T as each
receive character is transferred from the shift register to the Rx FIFO. The C/T is
placed in the counter mode, the start counter or stop counter commands are
disabled, the counter is stopped, and the counter ready bit, ISR[3], is reset. (see
also watchdog timer description in the receiver Section 6.3.7.)
1011
Set MR pointer to 0x0.
1100
Disable time-out mode. This command returns control of the C/T to the regular start
counter or stop counter commands. It does not stop the counter, or clear any
pending interrupts. After disabling the time-out mode, a stop counter command
should be issued to force a reset of the ISR[3] bit.
1101
Not used.
1110
Power-down mode on. In this mode, the DUART oscillator is stopped and all
functions requiring this clock are suspended. The execution of commands other
than disable Power-down mode (1111) requires a X1/CLK. While in the
Power-down mode, do not issue any commands to the CR except the disable
Power-down mode command. The contents of all registers will be saved while in
this mode. It is recommended that the transmitter and receiver be disabled prior to
placing the DUART into Power-down mode. This command is in CRA only.
1111
Disable Power-down mode. This command restarts the oscillator. After invoking this
command, wait for the oscillator to start up before writing further commands to the
CR. This command is in CRA only. For maximum power reduction input pins should
be at VSS or VDD.
Table 40.
Miscellaneous commands …continued
Command
Description
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| SC28L92A1BS,528 | 功能描述:UART 接口集成電路 3V-5V 1CH UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| SC28L92A1BS,551 | 功能描述:UART 接口集成電路 3V-5V 1CH UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| SC28L92A1BS,557 | 功能描述:UART 接口集成電路 3V-5V 1CH UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| SC28L92A1BS-F | 功能描述:UART 接口集成電路 3V-5V 1CH UART INTEL/MOT INTRF RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| SC28L92A1BS-S | 功能描述:UART 接口集成電路 3V-5V 1CH UART INTEL/MOT INTRF RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
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