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)： 9/55頁
文件大?。?/td> 2395K
代理商： VMX51C900
VMX51C900
______________________________________________________________________________________________
www.ramtron.com
page 9 of 55
The SP’s default value at reset is 07h. The SP can be
programmed to point anywhere in the 00h to FFh RAM
memory range.
Each time a function call is performed or an interrupt is
serviced, the 16-bit return address (2 bytes) is stored
onto the stack. Data can also be placed manually on
the stack by using the PUSH and POP instructions.
Description of Power Control Register
The VMX51C900 provides two power saving modes:
Idle and Power Down, which are controlled by the
PDOWN and IDLE bits of the PCON register at
address 87h.
T
ABLE
9:
P
OWER
C
ONTROL
R
EGISTER
(PCON)
-
SFR
87
H
7
6:4
SMOD
Bit
Mnemonic
7
SMOD
3
2
1
0
GF1
GF0
PDOWN
IDLE
Description
1: Double the baud rate of the serial port
frequency that was generated by Timer 1.
0: Normal serial port baud rate generated by
Timer 1.
General Purpose Flag
General Purpose Flag
Power Down mode control bit
Idle mode control bit
6
5
4
3
2
1
0
GF1
GF0
PDOWN
IDLE
The Idle mode is useful in applications that require
reduced power consumption. When in Idle mode, the
processor clock is stopped, but the peripherals
continue running. The contents of the RAM, I/O state
and SFR registers are maintained and the timer,
external interrupts and UARTs are left operational.
Since only the processor clock stops, normal operating
power will be cut to about half. The processor will
awaken if an external event triggering an interrupt
occurs.
In Power Down mode, the VMX51C900 oscillator and
peripherals, including the watchdog timer, are
disabled. The contents of the RAM and the SFR
registers, however, are maintained.
When in Power Down mode, the VMX51C900 current
consumption drops to about 100uA. The only way to
exit a Power Down mode is to perform a hardware
reset.
The SMOD bit of the PCON register controls the
oscillator divisor applied to Timer1 when used as a
baud rate generator for the UART. Setting this bit to 1
doubles the frequency of the UART’s baud rate
generator.
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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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