Motorola MPC823e Reference Manual page 1021

LCD Controller
HPC—Horizontal Pixel Count
This field specifies the number of pixels per line adjusted by panel type and bits per pixel.
Use Table 18-2 to program the value for this field.
Table 18-2. Horizontal Pixel Count Programming
BITS PER PIXEL/PANEL TYPE
1-Bit Monochrome, 2-/4-Bit Grayscale
4-/8-Bit Color Passive
4-/8-Bit Color Active (TFT)
NOTE: H indicates the number of pixels per line.
WBL—Wait Between Lines
To achieve the best display quality, this field can be used as an adjustable parameter to
modify the resultant image. This field represents the wait period between lines, which are
measured in SHIFT/CLK cycles. The total number of wait cycles between lines (TWBL) is
equal to WBL+N, where:
N = 7 in configurations in which the panel type is a passive monochrome with a 4 bit
data bus configured with two or four bits per pixel. BPIX = 01 or 10, CLOR = 0,
TFT = 0, and LBW = 0 as defined in the LCCR.
N = 5 for all other configurations.
TWBL is used to calculate HSYNC timing in Section 18.3.9.3 Active Interface.
18-24
LCD PANEL TYPE/DATA WIDTH
SINGLE-SCAN
12 BIT 8-BIT
— 1/8 * H
— 3/8 * H
H —
MPC823e REFERENCE MANUAL
DUAL-SCAN
4-BIT 8-BIT 4-BIT
1/4 * H 1/4 * H 1/2 * H
3/4 * H 3/4 * H —
— — —
MOTOROLA