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| 型号： | SC16C852VIET,157 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 25/55页 |
| 文件大小： | 0K |
| 描述： | IC UART DUAL W/FIFO 36TFBGA |
| 产品培训模块： | Stand-Alone UARTs |
| 标准包装： | 2,450 |
| 特点： | 可编程 |
| 通道数： | 2，DUART |
| FIFO's： | 128 字节 |
| 规程： | RS485 |
| 电源电压： | 2.5V |
| 带自动流量控制功能： | 是 |
| 带IrDA 编码器/解码器： | 是 |
| 带故障启动位检测功能： | 是 |
| 带调制解调器控制功能： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-TFBGA |
| 供应商设备封装： | 36-TFBGA（3.5x3.5） |
| 包装： | 托盘 |
| 其它名称： | 568-4019 935282518157 SC16C852VIET SC16C852VIET-ND |
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SC16C852V
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 5 — 21 January 2011
31 of 55
NXP Semiconductors
SC16C852V
Dual UART with 128-byte FIFOs, IrDA, and XScale VLIO bus interface
7.8 Modem Status Register (MSR)
This register shares the same address as EFCR register. This is a read-only register and
it provides the current state of the control interface signals from the modem, or other
peripheral device to which the SC16C852V is connected. Four bits of this register are
used to indicate the changed information. These bits are set to a logic 1 whenever a
control input from the modem changes state. These bits are set to a logic 0 whenever the
CPU reads this register.
When write, the data will be written to EFCR register.
[1]
Whenever any MSR bit 3:0 is set to logic 1, a Modem Status Interrupt will be generated.
Table 23.
Modem Status Register bits description
Bit
Symbol
Description
7
MSR[7]
CD. During normal operation, this bit is the complement of the CD input.
Reading this bit in the loopback mode produces the state of MCR[3]
(OP2A/OP2B).
6
MSR[6]
RI. During normal operation, this bit is the complement of the RI input. Reading
this bit in the loopback mode produces the state of MCR[2] (OP1A/OP1B).
5
MSR[5]
DSR. During normal operation, this bit is the complement of the DSR input.
During the loopback mode, this bit is equivalent to MCR[0] (DTR).
4
MSR[4]
CTS. During normal operation, this bit is the complement of the CTS input.
During the loopback mode, this bit is equivalent to MCR[1] (RTS).
3MSR[3]
ΔCD [1]
logic 0 = no CD change (normal default condition)
logic 1 = the CD input to the SC16C852V has changed state since the last
time it was read. A modem Status Interrupt will be generated.
2MSR[2]
ΔRI [1]
logic 0 = no RI change (normal default condition)
logic 1 = the RI input to the SC16C852V has changed from a logic 0 to a
logic 1. A modem Status Interrupt will be generated.
1MSR[1]
ΔDSR [1]
logic 0 = no DSR change (normal default condition)
logic 1 = the DSR input to the SC16C852V has changed state since the last
time it was read. A modem Status Interrupt will be generated.
0MSR[0]
ΔCTS [1]
logic 0 = no CTS change (normal default condition)
logic 1 = the CTS input to the SC16C852V has changed state since the last
time it was read. A modem Status Interrupt will be generated.
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| SC16C852VIET-G | 功能描述:UART 接口集成电路 1.8V 2CH UART 128B FIFO 5MBPS RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
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