128x32 graphic cob display module — 128 x 32 dot graphic LCD modules in COB and COG builds. The COG version uses an ST7567A at 1/33 duty and 1/5 bias; the COB version uses a KS0108 (or equivalent) on an 8-bit parallel bus.
Specifications
| Model | MLG12832Y-1B (COB), MLG12832J-13 (COG) |
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| Resolution | 128 x 32 dots |
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| Build | COB and COG versions |
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| Driver IC | ST7567A (MLG12832J-13 COG), KS0108 or equivalent (MLG12832Y-1B COB) |
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| Drive method | 1/33 duty, 1/5 bias |
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| Display mode | STN / FSTN / FFSTN optional |
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| Viewing direction | 6 o'clock |
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| Backlight | White, 2 LEDs (COG version) |
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| Operating temperature | -20 to +70 degree |
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| Storage temperature | -30 to +80 degree |
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Compare with nearby graphic LCD sizes
| Resolution | Driver IC | Build | Backlight |
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| 122 x 32 | ST7567 / SBN1661G-M18 | COB / COG | White LED |
| 128 x 32 | ST7567A / KS0108 | COB / COG | White LED |
| 128 x 64 COG | ST7567 | COG | White LED (transmissive / transflective) |
FAQ
Is the ST7567A the same as the ST7567?
They are the same controller family and share the command set, so ST7567 firmware normally runs on an ST7567A. The bias and duty settings differ slightly, so check the initialisation sequence in the datasheet before swapping one for the other.
How much memory does the 128x32 frame buffer take?
128 x 32 dots at 1 bit per dot is 512 bytes, small enough to keep a full shadow buffer inside the microcontroller and refresh the panel over SPI.
Can the 128x32 be driven from a 3.3 V microcontroller?
The COG ST7567A build runs from a 3.0 V or 3.3 V logic supply, so it connects directly to a 3.3 V MCU without level shifters. The COB build is a 5 V part.
What is the difference between the 128x32 and the 122x32 module?
The 128x32 gives 6 more columns of dots while keeping a similar outline. If your display buffer is already a multiple of 8 columns wide, the 128x32 maps to whole bytes and needs no bit shifting.
