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參數(shù)資料
| 型號： | VMX51C900 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Versa Mix 8051 MCU with LCD Controller and ADC |
| 中文描述： | 8051反之亦然混合與LCD控制器和ADC的微控制器 |
| 文件頁數(shù)： | 23/55頁 |
| 文件大?。?/td> | 2395K |
| 代理商： | VMX51C900 |
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VMX51C900
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www.ramtron.com
page 23 of 55
arrives at the leftmost position in the shift register, (9-
bit register), it tells the UART’s receive controller block
to perform one last shift operation: to set RI and to load
SBUF and RB8. The signal to load SBUF and RB8,
and to set RI, will be generated if, and only if, the
following conditions are met at the time the final shift
pulse is generated:
o
Either SM2 = 0 or the received stop bit = 1
o
RI = 0
If both conditions are met, the stop bit goes into RB8,
the 8 data bits go into SBUF, and RI is activated. If one
of these conditions is not met, the received frame is
completely lost. At this time, whether the above
conditions are met or not, the unit goes back to
searching for a one to zero transition in RXD.
UART Operation in Mode 2
In Mode 2 a total of 11 bits are transmitted (through
TXD) or received (through RXD). The transactions are
composed of: a Start bit (Low), 8 data bits (LSB first), a
programmable 9
th
data bit, and one Stop bit (High).
For transmission, the 9
th
data bit comes from the TB8
bit of SCON. For example, the parity bit P in the PSW
could be moved into TB8.
In the case of receive, the 9
th
data bit is automatically
written into RB8 of the SCON register.
In Mode 2, the baud rate is programmable to either
1/32 or 1/64 the oscillator frequency.
F
IGURE
14:
S
ERIAL
P
ORT
M
ODE
2
B
LOCK
D
IAGRAM
Internal Bus
SBUF
D
S
Q
ZERO DETECTOR
CLK
1
Write to
SBUF
TX Control Unit
Start
TX Clock
Data
Send
RX Control Unit
RI
TI
RX Clock
Control
Start
SHIFT
9-Bit Shift Register
SBUF
Internal Bus
READ SBUF
LOAD SBUF
Serial Port
Interrupt
Shift
Bit
Detector
÷16
÷16
1-0 Transition
Detector
RXD
÷2
Fosc/2
SMOD
0
1
Load
SBUF
Shift
TXD
Stop
Sample
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| VMX51C900-25-L | 功能描述:8位微控制器 -MCU 8K+256 25MHz 5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| VMX51C900-25-LG | 功能描述:8位微控制器 -MCU 8K+256 25MHz 5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| VMX51C900-25-L-G | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Versa Mix 8051 MCU with LCD Controller and ADC |
| VMX51C900-25-P | 功能描述:8位微控制器 -MCU 8K+256 25MHz 5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| VMX51C900-25-PG | 功能描述:8位微控制器 -MCU 8K+256 25MHz 5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
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