The CFA533-***-KC series is a 16x2 I2C LCD with keypad. The I2C interface allows you to use just two lines (SDA & SCL) to have bi-directional communication with the I2C LCD. Other devices can also share those two I2C control lines with the LCD. Only 4 wires are needed to connect this I2C LCD: power, ground, SDA (I2C Serial DAta) and SCL (I2C Serial CLock).
The CFA533 can run on 3.3v to 5.0v directly, with no changes needed, so you do not need to do any level translation between your embedded processor and the I2C LCD. Simply power the CFA533 from the same supply as your processor and the I2C signal levels will match up.
Using only one address on your I2C bus, you can add all the elements that you need for your front panel. The CFA533 I2C LCD can also read up to 32 DS18B20 digital temperature sensors, giving you an easy way to integrate temperature sensing over the I2C bus. No additional firmware or pins are needed on the host system.
This CFA533-YYH variant shows crisp, dark letters against a yellow-green backlit background. The keypad is backlight in a matching yellow-green. Since the LCD is a backlit positive STN, the CFA533-YYH I2C LCD is easily viewable in all lighting conditions, from direct sunlight to a completely dark room.
I2C host interface controls the LCD and reads the keypad.
Compact size: fits in a 1U rack mount case (35mm overall height).
Integrated 16x2 LED backlit character LCD.
Integrated LED backlit 6-button translucent silicon keypad with screened legend with the popular arrows, enter and cancel layout.
Advanced digital GPIO control with PWM output.
Robust packet based communications protocol with CRC.
Non-volatile memory (EEPROM): Set the "power-on" display screen, plus 16-bytes for storing IP, netmask, or system serial number.
The CFA533 KC series of advanced display modules will be changing from the current firmware v1.1 to v1.2. Design changes were made for backwards compatibility.
As part of our continuous improvement, firmware has been updated for use with updated hardware for the CFA533 series of advanced display modules.
Command 1 (0x01): Get Hardware & Firmware Version
This command will now report the following string = “CFA533:h1.4,c1v2”
23 (0x17): Enable Key Ready Flag
Due to the nature of the I2C protocol, we have included an out-of-band method of checking for key presses and releases. This command allows GPIO (J8's Pin 7) to act as a key ready flag. If enabled, it sets GPIO high until read by the host using 24 (0x18): Read Keypad, Polled Mode (Pg. 46).
type: 0x17 = 2310 data_length: 1
data = 0 => GPIO 0 is normal
data = 1 => GPIO 0 driven high if a key is ready driven low if no keys are ready
The return packet will be:
type: = 23
data_length: = 0
CFA533 firmware version 1.2 is considered a fit and form replacement. Testing of new firmware is recommended when the new hardware version 1.4 is available.
CFA533 hardware v1.4 should begin shipping Q4 2016.
Engineering samples for testing / validation will be available during this same time frame.
No price change is currently scheduled.
Part Change Notice #10724: CFA533 series Hardware revision 1.1 to 1.4
The CFA533 series of advanced display modules will be changing from the current hardware version 1.1 to version 1.4. Design changes were made for backwards compatibility. Hardware version 1.4 requires firmware version 1.2 or newer.
As part of our continuous improvement, design changes have been made to the hardware of the CFA533 series of advanced display modules for improved manufacturability, improved quality, and a lower current profile.
Factory default configuration has no functional changes. Standard and custom configurations are not affected by the new hardware layout. CFA533 hardware version 1.4 should replace the previous version of the CFA533 with no physical changes and is considered a fit and form replacement.
Six 0 ohm resistors have been added as factory default for closing the following jumpers:
JPGPIO1 -> RJPGPIO1
JPUSBPWR -> RJPUSBPWR
JP2 -> RJP2
JP4 -> RJP4
JP6 -> RJP6
JP8 -> RJP8
Solder jumpers are still in place for configuration after jumper resistor removed. Jumpers will appear open. Configuration changes not performed by Crystalfontz America, Inc. will need to make note of this manufacturing change.
CFA533 hardware version 1.4 is considered a fit and form replacement. Testing of new hardware is recommended when available.
CFA533 hardware version 1.4 should begin shipping Q4 2016.
Engineering samples for testing / validation will be available during this same time frame.
As part of our continuous improvement, we are releasing a new version of the CFA533 KC, or I2C firmware. This is a point release from c1.0 to c1.0.
Bug: Key press / release packets would be sent from display unless specifically turned off. This behavior is not consistent with a slave device on an I2C bus. The extra packets could cause output buffer overflow issues. Key press / release reporting is now turned off as core functionality of the CFA533 I2C firmware. Key press / release conditions are stored in the output buffer and are sent to host when polled.
Updates: Bring firmware into line with functionality of base CFA533 firmware.
Firmware update has been designed for low to no impact.
Customers with Defined Part (DP) numbers will continue to receive display modules with the version of firmware currently approved.
New firmware will begin shipping on 2015-10-01.
There is no price change associated with this PCN.
Part Change Notice #10658: Deprecation of "Drive Bay Kit Configurator" / New part numbers for drive bay kits.
Deprecation of "Drive Bay Kit Configurator" / New part numbers for drive bay kits.
Starting August 1, 2015 the "Drive Bay Kit Configurator" located at https://www.crystalfontz.com/products/select_kit.html will no longer be functional for ordering one of our Serial or USB displays (CFA533, CFA631, CFA632, CFA633, CFA634, CFA635, and CFA735) in a bracket or SLED. This functionality is being moved to the Customize and Add to Cart process when checking out. This will allow for further customization by our customers to better fit their needs.
This change will eliminate the current "kits", but will add options not previously available such as pre-configured ATX functionality, and ALL the currently available interfaces will be orderable in a drive bay bracket or SLED.
The new part numbers will have the bracket / SLED and overlay type as a PREFIX to the configured part number. The choice for bracket / SLED to a display order will be via the cart options. Our CFA835 displays were introduced with these configuration options.
To see how the new options will look, and what the new part numbers will look like, please see one of our CFA835 parts: https://www.crystalfontz.com/cart/addtocart.php?product_id=2277&qty=1
NOTE: The SLED is only available for the CFA635, CFA735, and CFA835 products.
As part of our continuous improvement process, we are integrating the ordering of displays in drive bay and SLED kits as part of the display ordering process.
Drive bay kits in their current configuration will no longer be available.
Place orders prior to 2015-08-01 for upcoming production needs via our website or by contacting our logistics department via email: firstname.lastname@example.org, or by calling 1-888-206-9720 (International call +1-509-892-1200).
After the 2015-08-01, please contact our engineering department via email@example.com to assist you with ordering your bracket / SLED kits.
Starting 2015-08-01, the bracket and SLED options for our serial and USB display will be part of the ordering process for the displays
Pricing bracket / SLED configurations will reflect manufacturing costs.
Part Change Notice #10351: CFA533 family hardware revision v1.1
New inductor package for backlight control circuit. This is being done to improve the manufacturabilty of the CFA533.
Addition of JPGPIO1. This jumper will be closed by default and bypasses a 5KΩ pull-up resistor that is in line with GPIO to the micro-controller.
Improved Yellow-green backlight for the YYH variants. The backlight now has a total of 10 yellow-green LEDs instead of 6. This improves the visual quality and appearance of the LCD backlight. Typical weight will increase to 43g, from 41g for the CFA533 YYH variants.
As part of our continuous improvement process, the CFA533 family is being revised to hardware v1.1. This was done based on customer feedback to improve the functionality and appearance of the CFA533 family.
Hardware v1.1 should be a drop in replacement for most applications. No form or fit changes have been implemented.
The exception may be with the YYH variants. Due to the increased number of yellow-green LEDs in the LCD backlight, the current profile of these variants has increased.
Participate in discounted pricing for first run CFA533 v1.1 hardware based modules through September 30, 2011.
First run CFA533 v1.1 hardware based modules and datasheet will be available for customer qualification / in-house approval on August 8, 2011 through September 30, 2011 for a maximum quantity of three at the currently published 50 piece price.
Volume shipment end of Q3 2011
Shipments of v1.0 hardware will continue until inventory levels exhausted.
Full transition to v1.1 hardware expected by end of Q4 2011.
No price change is scheduled at this time. Pricing will be reviewed Q1 2012.
Technical Bulletin TB01: Comparison of CFA533 and CFA633 Modules by Version Number
The attached PDF file describes differences between our CFA633 v1.5x and CFA633 v2.0 intelligent display module series. We also list the CFA533 series as a comparison for customers who do not require the fan control available in the CFA633 series. Hardware version numbers are silk screened on the back of the PCBs.
Additional information can be found in supporting documents for PCN: