Ltdc Active Width Configuration Register (Ltdc_Awcr) - STMicroelectronics STM32F405 Reference Manual

LCD-TFT Controller (LTDC)
Bits 31:28 Reserved, must be kept at reset value
Bits 27:16 AHBP[11:0]: Accumulated Horizontal back porch (in units of pixel clock period)
Bits 15:11 Reserved, must be kept at reset value
Bits 10:0 AVBP[10:0]: Accumulated Vertical back porch (in units of horizontal scan line)
16.7.3

LTDC Active Width Configuration Register (LTDC_AWCR)

This register defines the accumulated number of Horizontal Synchronization, back porch
and Active pixels minus 1 (HSYNC width + HBP + Active Width - 1) and the accumulated
number of Vertical Synchronization, back porch lines and Active lines minus 1 (VSYNC
Height+ BVBP + Active Height - 1). Refer to
programmable parameters
Address offset: 0x10
Reset value: 0x0000 0000
31 30 29 28
Reserved
15 14 13 12
Reserved
Bits 31:28 Reserved, must be kept at reset value
Bits 27:16 AAW[11:0]: Accumulated Active Width (in units of pixel clock period)
Bits 15:11 Reserved, must be kept at reset value
Bits 10:0 AAH[10:0]: Accumulated Active Height (in units of horizontal scan line)
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These bits define the Accumulated Horizontal back porch width which includes the
Horizontal Synchronization and Horizontal back porch pixels minus 1.
The Horizontal back porch is the period between Horizontal Synchronization going
inactive and the start of the active display part of the next scan line.
These bits define the accumulated Vertical back porch width which includes the Vertical
Synchronization and Vertical back porch lines minus 1.
The Vertical back porch is the number of horizontal scan lines at a start of frame to the
start of the first active scan line of the next frame.
for an example of configuration.
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These bits define the Accumulated Active Width which includes the Horizontal
Synchronization, Horizontal back porch and Active pixels minus 1.
The Active Width is the number of pixels in active display area of the panel scan line. The
maximum Active Width supported is 0x400.
These bits define the Accumulated Height which includes the Vertical Synchronization,
Vertical back porch and the Active Height lines minus 1. The Active Height is the number
of active lines in the panel. The maximum Active Height supported is 0x300.
DocID018909 Rev 11
Figure 82
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AAW[11:0]
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AAH[10:0]
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and Section 16.4: LTDC
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RM0090
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1 0
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