Datasheet

Table 37-5. RGB Format in Default Mode, RGB_CFG = 00, Swap Activated
Mode Byte D7 D6 D5 D4 D3 D2 D1 D0
RGB 8:8:8 Byte 0 R0(i) R1(i) R2(i) R3(i) R4(i) R5(i) R6(i) R7(i)
Byte 1 G0(i) G1(i) G2(i) G3(i) G4(i) G5(i) G6(i) G7(i)
Byte 2 B0(i) B1(i) B2(i) B3(i) B4(i) B5(i) B6(i) B7(i)
Byte 3 R0(i+1) R1(i+1) R2(i+1) R3(i+1) R4(i+1) R5(i+1) R6(i+1) R7(i+1)
RGB 5:6:5 Byte 0 G3(i) G4(i) G5(i) R0(i) R1(i) R2(i) R3(i) R4(i)
Byte 1 B0(i) B1(i) B2(i) B3(i) B4(i) G0(i) G1(i) G2(i)
Byte 2 G3(i+1) G4(i+1) G5(i+1) R0(i+1) R1(i+1) R2(i+1) R3(i+1) R4(i+1)
Byte 3 B0(i+1) B1(i+1) B2(i+1) B3(i+1) B4(i+1) G0(i+1) G1(i+1) G2(i+1)
The RGB 5:6:5 input format is processed to be displayed as RGB 5:6:5 format, compliant with the 16-bit mode of the
LCD controller
.
37.5.3 Clocks
The sensor master clock (ISI_MCK) can be generated either by the Advanced Power Management Controller
(APMC) through a Programmable Clock output or by an external oscillator connected to the sensor.
None of the sensors embed a power management controller, so providing the clock by the APMC is a simple and
efficient way to control power consumption of the system.
Care must be taken when programming the system clock. The ISI has two clock domains, the sensor master clock
and the pixel clock provided by sensor. The two clock domains are not synchronized, but the sensor master clock
must be faster than the pixel clock.
37.5.4 Preview Path
37.5.4.1 Scaling, Decimation (Subsampling)
This module resizes captured 8-bit color sensor images to fit the LCD display format. The resize module performs
only downscaling. The same ratio is applied for both horizontal and vertical resize, then a fractional decimation
algorithm is applied.
The decimation factor is a multiple of 1/16; values 0 to 15 are forbidden.
Table 37-6. Decimation Factor
Decimation Value 0–15 16 17 18 19 ... 124 125 126 127
Decimation Factor — 1 1.063 1.125 1.188 ... 7.750 7.813 7.875 7.938
Table 37-7. Decimation and Scaler Offset Values
OUTPUT INPUT 352 × 288 640 × 480 800 × 600 1280 × 1024 1600 × 1200 2048 × 1536
VGA
640 × 480
F — 16 20 32 40 51
QVGA
320 × 240
F 16 32 40 64 80 102
CIF
352 × 288
F 16 26 33 56 66 85
QCIF
176 × 144
F 32 53 66 113 133 170
SAM E70/S70/V70/V71 Family
Image Sensor Interface (ISI)
© 2019 Microchip T
echnology Inc.
Datasheet
DS60001527D-page 532