探索NHD - 1.5 - Breakout：1.5英寸彩色OLED玻璃 breakout板详解

在电子设计领域，显示模块的设计与应用至关重要。今天，我们来深入了解Newhaven Display推出的NHD - 1.5 - Breakout，这是一款专门为1.5英寸彩色OLED玻璃设计的breakout板。

文件下载：NHD-1.5-BREAKOUT.pdf

一、产品概述

NHD - 1.5 - Breakout是Newhaven Display International, Inc.旗下的产品，其对角线尺寸为1.5英寸。该公司位于Elgin IL，联系电话为847 - 844 - 8795，传真为847 - 844 - 8796，邮箱为[e-mail]和[e-mail]，官方网站是www.newhavendisplay.com。

二、功能与特性

2.1 适配与电路设计

它是专门为1.5英寸彩色OLED玻璃（NHD - 1.5 - 128128G）设计的breakout板，板载有升压电路（FAN5331SX）。同时，还提供了跳线选项，可绕过升压电路，直接提供(V_{cc})。并且，该产品属于开源硬件，方便开发者进行二次开发。

2.2 硬件布局

从硬件布局来看，它有OLED显示屏、用户界面、LED驱动器、LED驱动电源指示灯以及3.5mm的安装孔等。

三、引脚描述

3.1 电源引脚

Pin No.	Symbol	External Connection	Function Description
1	GND	Power Supply	Ground
2	3V3	Power Supply	Supply Voltage for OLED Logic (+3.3V)
3	DRV_VDD	Power Supply	Supply Voltage for boost converter (+5V) to drive OLED panel voltage (VCC). (Should be no connect if using pin 4 to apply external VCC)
4	N.C./VCC	-	No Connect by default. Can be configured for external VCC (+13V). (refer to On - Board Jumper Options table below)
23 - 26	GND	Power Supply	Ground

3.2 控制引脚

Pin No.	Symbol	External Connection	Function Description
5	SHDN#	MPU	Active LOW Shutdown control pin for boost converter (pulled HIGH via on - board 10kΩ resistor)
6	GPIO0	MPU	See command 0xB5 (can be treated as a no connect)
7	GPIO1	MPU	See command 0xB5 (can be treated as a no connect)
8	RES#	MPU	Active LOW Reset signal
9	D/C#	MPU	Register Select signal. LOW: Command. HIGH: Data
10	CS#	MPU	Active LOW Chip Select signal
11	BS1	MPU	MPU interface select signal
12	BS0	MPU	MPU interface select signal
13	R/W#	MPU	6800 mode : Read/Write signal. LOW: Write. HIGH: Read 8080 mode : Active LOW Write signal
14	E/RD#	MPU	6800 mode : Enable signal. Falling edge triggered 8080 mode : Active LOW Read signal

3.3 数据引脚

Pin No.	Symbol	External Connection	Function Description
15	D0/SCK	MPU	Parallel interface :
16	D1/SDIN	MPU	8 - bit bi - directional data bus Serial interface : D0 = Serial Clock signal (SCK) D1 = Serial Data Input signal (SDIN)
17	D2	MPU
18	D3	MPU
19	D4	MPU
20	D5	MPU
21	D6	MPU
22	D7	MPU

四、MPU接口引脚分配总结

Bus Interface	D7	D6	D5	D4	D3	D2	D1	D0	E	R/W	BS0	BS1	CS#	D/C#	RES#	GPIO1	GPIO0
8 - bit 6800					D[7:0]				E	R/W	1	1	CS#	D/C#	RES#	NC	NC
8 - bit 8080					D[7:0]				RD#	WR#	0	1	CS#	D/C#	RES#	NC	NC
4 - wire SPI			0			NC	SDIN	SCK	0	0	0	0	CS#	D/C#	RES#	NC	NC
3 - wire SPI			0			NC	SDIN	SCK	0	0	1	0	CS#	0	RES#	NC	NC

这里“X”表示不关心，“NC”表示不连接，“1”表示VDD，“0”表示VSS。大家在实际设计中，要根据具体的接口类型来正确连接引脚，你是否遇到过因为引脚连接错误而导致的问题呢？

五、板载跳线选项

5.1 默认跳线设置

R10	R11	Description
Open	Close	(default) Boost converter circuit (+5V on pin 3) is used to provide VCC to OLED Glass.

5.2 跳线选项1 - 外部电源供应

R10	R11	Description
Close	Open	Boost converter circuit (pin 3) is not used.
User must apply VCC (+13V) externally to (pin 4).
OLED logic is still powered from 3V3 (pin 2).
This method allows for minimum current drain.

六、电气特性

Item	Symbol	Condition	Min.	Typ.	Max.	Unit
Operating Temperature Range	T OP	Absolute Max	-40	-	+70	⁰C
Storage Temperature Range	T ST	Absolute Max	-40	-	+85	⁰C
Supply Voltage for OLED Logic	3V3	-	2.8	3.0	3.5	V
Supply Voltage for Boost Circuit	DRV_VDD	-	-	5.0	5.5	V
Supply Voltage for OLED Panel	V CC	-	12.5	13.0	13.5	V

需要注意的是，不建议在未连接显示屏的情况下给板卡供电，否则可能会损坏升压电路，Newhaven Display对此类损坏导致的PCB故障不承担责任。

七、兼容OLED玻璃

该板专门设计用于驱动和引出NHD - 1.5 - 128128G的信号，你可以从http://www.newhavendisplay.com/specs/NHD - 1.5 - 128128G.pdf下载其规格书。

八、质量信息与注意事项

8.1 质量测试

Test Item	Content of Test	Test Condition	Note
High Temperature storage	Test the endurance of the display at high storage temperature.	+85⁰C, 240 Hrs.	2
Low Temperature storage	Test the endurance of the display at low storage temperature.	-40⁰C, 240 Hrs.	1,2
High Temperature Operation	Test the endurance of the display by applying electric stress (voltage & current) at high temperature.	+70⁰C, 240 Hrs.	2
Low Temperature Operation	Test the endurance of the display by applying electric stress (voltage & current) at low temperature.	-40⁰C, 240 Hrs.	1,2
High Temperature / Humidity Operation	Test the endurance of the display by applying electric stress (voltage & current) at high temperature with high humidity.	+60⁰C, 90% RH, 120 Hrs.	1,2

Note 1: No condensation to be observed. Note 2: Conducted after 2 hours of storage at 25⁰C, 0%RH.

8.2 注意事项

使用OLEDs/LCDs/LCMs的注意事项可参考www.newhavendisplay.com/specs/precautions.pdf，保修信息可查看http://www.newhavendisplay.com/index.php?main_page=terms。

总之，NHD - 1.5 - Breakout是一款功能丰富、设计灵活的breakout板，在彩色OLED显示模块的设计中具有很大的应用潜力。你在使用类似的breakout板时，有没有什么独特的经验或遇到过什么挑战呢？欢迎在评论区分享。