REV. 4.0.1 6 . 2.2 Device Reset The RESET input resets the internal registers and the serial interface outputs" />
參數(shù)資料
型號(hào)： ST16C2450CJ-0A-EB
廠商： Exar Corporation
文件頁數(shù)： 27/30頁
文件大?。?/td> 0K
描述： EVAL BOARD FOR ST16C2450 44PLCC
標(biāo)準(zhǔn)包裝： 1
系列： *
ST16C2450
xr
2.97V TO 5.5V DUART
REV. 4.0.1
6
.
2.2
Device Reset
The RESET input resets the internal registers and the serial interface outputs in both channels to their default
state (see Table 8). An active high pulse of at least 40 ns duration will be required to activate the reset function
in the device.
2.3
Channel A and B Selection
The UART provides the user with the capability to bi-directionally transfer information between an external
CPU and an external serial communication device. A logic 0 on chip select pins, CSA# or CSB#, allows the
user to select UART channel A or B to configure, send transmit data and/or unload receive data to/from the
UART. Selecting both UARTs can be useful during power up initialization to write to the same internal registers,
but do not attempt to read from both uarts simultaneously. Individual channel select functions are shown in
2.4
Channel A and B Internal Registers
Each UART channel in the 2450 has a standard register set for controlling, monitoring and data loading and
unloading. These registers function as data holding registers (THR/RHR), interrupt status and control registers
(ISR/IER), receive line status and control registers (LSR/LCR), modem status and control registers (MSR/
MCR), programmable data rate (clock) divisor registers (DLL/DLM), and a user accessible scratch pad register
(SPR).
FIGURE 3.
ST16C2450 DATA BUS INTERCONNECTIONS
TABLE 1: CHANNEL A AND B SELECT
CSA#
CSB#
FUNCTION
1
UART de-selected
0
1
Channel A selected
1
0
Channel B selected
0
Channel A and B selected
VCC
OP2A#
DSRA#
CTSA#
RTSA#
DTRA#
RXA
TXA
RIA#
CDA#
OP2B#
DSRB#
CTSB#
RTSB#
DTRB#
RXB
TXB
RIB#
CDB#
GND
A0
A1
A2
UART_CSA#
UART_CSB#
IOR#
IOW#
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
CSA#
CSB#
D0
D1
D2
D3
D4
D5
D6
D7
IOR#
IOW#
UART
Channel A
UART
Channel B
UART_INTB
UART_INTA
INTB
INTA
UART_RESET
RESET
RS-232 Serial Interface
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST16C2450CJ44 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
ST16C2450CJ44-F 功能描述:UART 接口集成電路 DUAL 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
ST16C2450CJ44TR 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
ST16C2450CJ44TR-F 制造商:Exar Corporation 功能描述:UART 2-CH 1Byte FIFO 3.3V/5V 44-Pin PLCC T/R 制造商:Exar Corporation 功能描述:ST16C2450CJ44TR-F
ST16C2450CP40 功能描述:UART 接口集成電路 DUAL 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
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