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參數(shù)資料
| 型號： | LPC12D27FBD100 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 數(shù)學(xué)處理器 |
| 英文描述： | 32-bit ARM Cortex-M0 microcontroller; 128 kB flash and 8 kB SRAM; 4 x 40 segment LCD driver |
| 中文描述： | 32位ARM Cortex-M0的微控制器，128KB閃存和8 KB靜態(tài)隨機存儲器;4×40段LCD驅(qū)動器 |
| 封裝： | LPC12D27FBD100/301<SOT407-1 (LQFP100)|<<http://www.nxp.com/packages/SOT407-1.html<1<Always Pb-free,; |
| 文件頁數(shù)： | 15/46頁 |
| 文件大小： | 371K |
| 代理商： | LPC12D27FBD100 |
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LPC12D27
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 1 — 20 September 2011
15 of 46
NXP Semiconductors
LPC12D27
32-bit ARM Cortex-M0 microcontroller
7.2.2
Functional description
The PCF8576D is a versatile peripheral device interfacing the LPC1227 microcontroller
with a wide variety of LCDs. It can directly drive any static or multiplexed LCD containing
up to four backplanes and up to 40 segments.
The possible display configurations of the PCF8576D depend on the number of active
backplane outputs required. A selection of display configurations is shown in
Table 4
. The
integration of the LPC1227 microcontroller with the PCF8576D is shown in
Figure 1
.
Table 4.
Number of
Backplanes
4
3
2
1
7.2.3
Reset state of the LCD controller and pins
After power-on, the LCD controller resets to the following starting conditions:
All backplane and segment outputs are set to V
LCD
.
The selected drive mode is 1:4 multiplex with 1/3 bias.
Blinking is switched off.
Input and output bank selectors are reset.
The I
2
C-bus interface is initialized.
The data pointer and the subaddress counter are cleared (set to logic 0).
The display is disabled.
Remark:
Do not transfer data on the
I
2
C
-bus for at least 1 ms after a power-on to allow the
reset action to complete.
7.2.4
LCD bias generator
Fractional LCD biasing voltages are obtained from an internal voltage divider consisting of
three impedances connected in series between V
LCD
and V
SS(LCD)
. The middle resistor
can be bypassed to provide a 1/2 bias voltage level for the 1:2 multiplex configuration. The
LCD voltage can be temperature compensated externally using the supply to pin V
LCD
.
7.2.5
Oscillator
7.2.5.1
Internal clock
The internal logic of the PCF8576D and its LCD drive signals are timed either by its
internal oscillator or by an external clock. The internal oscillator is enabled by connecting
pin OSC to pin V
SS(LCD)
. If the internal oscillator is used, the output from pin CLK can be
used as the clock signal for several PCF8576Ds in the system that are connected in
cascade.
Selection of display configurations
Digits/Characters
7-segment
20
15
10
5
Segments
160
120
80
40
14-segment
10
7
5
2
Dot matrix/Elements
160 (4
40)
120 (3
40)
64 (2
40)
40 (1
40)
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| LPC12D27FBD100/301 | 功能描述:ARM微控制器 - MCU 32B CORTEX-M0 128KB FL/8KB SRAM RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
| LPC12D27FBD100/301,551 | 制造商:NXP Semiconductors 功能描述:0 |
| LPC12H25FBD64/301, | 功能描述:ARM微控制器 - MCU MCU RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
| LPC12H27FBD64/301, | 功能描述:ARM微控制器 - MCU MCU RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
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