參數(shù)資料
型號: PIC16LF1826-I/P
廠商: Microchip Technology
文件頁數(shù): 78/109頁
文件大?。?/td> 0K
描述: IC MCU 8BIT FLASH 18-DIP
產(chǎn)品培訓模塊: 8-bit PIC® Microcontroller Portfolio
標準包裝: 25
系列: PIC® XLP™ mTouch™ 16F
核心處理器: PIC
芯體尺寸: 8-位
速度: 32MHz
連通性: I²C,SPI,UART/USART
外圍設備: 欠壓檢測/復位,POR,PWM,WDT
輸入/輸出數(shù): 16
程序存儲器容量: 3.5KB(2K x 14)
程序存儲器類型: 閃存
EEPROM 大小: 256 x 8
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 12x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 18-DIP(0.300",7.62mm)
包裝: 管件
SC16C850
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 2 — 11 November 2010
30 of 55
NXP Semiconductors
SC16C850
2.5 to 3.3 V UART with 128-byte FIFOs and IrDA encoder/decoder
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 SC16C850 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 21.
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] (OP2).
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] (OP1).
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 SC16C850 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 SC16C850 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 SC16C850 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 SC16C850 has changed state since the last
time it was read. A modem Status Interrupt will be generated.
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