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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 33/55頁(yè) |
| 文件大小： | 2395K |
| 代理商： | VMX51C900 |
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VMX51C900
______________________________________________________________________________________________
www.ramtron.com
page 33 of 55
Integrated LCD Driver
The VMX51C900 features an on-chip LCD driver
designed to drive custom LCD panels in consumer,
medical and industrial systems.
The LCD driver is set up to drive a 14-segment x 4
common LCD panel, without the need for external
components.
Once
configured,
the
independently of the processor and generates the
appropriate signals to display the data saved in the
LCD buffer (LCDBUFx) registers, which are accessible
via the SFR registers.
The VMX51C900 LCD driver works on 1/4 duty and
1/3 bias. When activated, LCD driver power
consumption is about 0.88mA (1.2uA when de-
activated).
LCD
driver
operates
Timing Chart of LCD Driver Output
The 14-segment and the 4-common drivers are 4-level
outputs that switch between VDD, V1, V2 and VSS
LCD driver voltage levels.
The LCD segment/common states are stored into six
SFRs called LCDBUFx registers. Each LCDBUFx
register controls the state of two LCD segments for
each time-slot activated by the LCDCOMx lines. The
following diagram shows a typical LCD driver output
timing diagram:.
F
IGURE
20:
LCD
D
RIVER OUTPUT TIMING DIAGRAM
Configuring the LCD Driver
The initialization of the LCD driver is performed using
the
LCDCTRL,
P0IOCTRL,
LCDBUF[6:0] registers.
The LCD driver outputs are multiplexed with regular
VMX51C900 I/Os. For this reason, the I/Os required
for LCD operation must be configured for the LCD
driver mode. This is done by setting the corresponding
bits of the P0IOCTRL and P2IOCTRL registers to 1
and, if required, setting the LCDPRI bit of the
LCDCTRL register.
P2IOCTRL
and
T
ABLE
32:
P
ORT
0
I/O
C
ONTROL
R
EGISTER
(P0IOCTRL,
9A
H
)
7
LCDSEG6
LCDSEG7
3
LCDSEG10
LCDSEG11
Bit
Mnemonic
7
LCDSEG6
6
LCDSEG7
5
LCDSEG8
4
LCDSEG9
3
LCDSEG10
2
LCDSEG11
1
LCDSEG12
0
LCDSEG13
6
5
4
LCDSEG8
1
LCDSEG12
LCDSEG9
0
LCDSEG13
2
Description
1= Assign P0.7 to LCD Seg. 6 driver
1= Assign P0.6 to LCD Seg. 7 driver
1= Assign P0.5 to LCD Seg. 8 driver
1= Assign P0.4 to LCD Seg. 9 driver
1= Assign P0.3 to LCD Seg. 10 driver
1= Assign P0.2 to LCD Seg. 11 driver
1= Assign P0.1 to LCD Seg. 12 driver
1= Assign P0.0 to LCD Seg. 13 driver
T
ABLE
33:
P
ORT
2
I/O
C
ONTROL
R
EGISTER
(P2IOCTRL,
9C
H
)
7
LCDSEG3
LCDSEG2
3
LCDCOM3
LCDCOM2
Bit
Mnemonic
7
LCDSEG3
6
LCDSEG2
5
LCDSEG1
4
LCDSEG0
3
LCDCOM3
2
LCDCOM2
1
LCDCOM1
0
LCDCOM0
The LCD is activated by setting the LCDEN bit of the
LCDCTRL register.
The LCDON bit of the LCDCTRL serves to turn the
display ON so that the contents in the LCDBUFx
registers are sent to the display.
When the LCDPRI bit is set to 1, the VMX51C900
PSEN and ALE pins are assigned as the LCDSEG4
and LCDSEG5 lines, respectively.
6
5
4
LCDSEG1
1
LCDCOM1
LCDSEG0-
0
LCDCOM0
2
Description
1= Assign P2.7 to LCD Seg. 3 driver
1= Assign P2.6 to LCD Seg. 2 driver
1= Assign P2.6 to LCD Seg. 1 driver
1= Assign P2.6 to LCD Seg. 0 driver
1= Assign P2.6 to LCD Com. 3 driver
1= Assign P2.6 to LCD Com. 2 driver
1= Assign P2.6 to LCD Com. 1 driver
1= Assign P2.6 to LCD Com. 0 driver
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相關(guān)代理商/技術(shù)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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
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