參數(shù)資料
型號： M34552G8FP
元件分類： 微控制器/微處理器
英文描述： 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP48
封裝： 7 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-48
文件頁數(shù)： 30/143頁
文件大小： 0K
代理商： M34552G8FP
12: INK/CURSOR ARCHITECTURE
S1D13505F00A HARDWARE FUNCTIONAL
EPSON
1-113
SPECIFICATION (X23A-A-001-12)
12 INK/CURSOR ARCHITECTURE
12.1 Ink/Cursor Buffers
The Ink/Cursor buffers contain formatted image data for the Ink Layer or Hardware Cursor. There
may be several Ink/Cursor images stored in the display buffer but only one may be active at any
given time.
The active Ink/Cursor buffer is selected by the Ink/Cursor Start Address register (REG[30h]). This
register denes the start address for the active Ink/Cursor buffer. The Ink/Cursor buffer must be posi-
tioned where it does not conict with the image buffer and half-frame buffer. The start address for
the Ink/Cursor buffer is programmed as shown in the following table:
Table 12-1 Ink/Cursor Data Format
The Ink/Cursor image is stored contiguously. The address offset from the starting word of line n to
the starting word of line n+1 is calculated as follows:
Ink Address Offset (words) = REG[04h] + 1
Cursor Address Offset (words) = 8
12.2 Ink/Cursor Data Format
The Ink/Cursor image is always 2 bit-per-pixel. The following diagram shows the Ink/Cursor data
format for a little-endian system.
Figure 12-1 Ink/Cursor Data Format
The image data for pixel n, (An, Bn), selects the color for pixel n as follows:
Ink/Cursor Start
Address Bits [7:0]
Start Address (Bytes)
Comments
0
Display Buffer Size - 1024
This default value is suitable for a cursor when there is
no half-frame buffer.
n = 255...1
Display Buffer Size - (n
× 8192)
These positions can be used to:
position an Ink buffer at the top of the display buffer;
position an Ink buffer between the image and half-
frame buffers;
position a Cursor buffer between the image and half-
frame buffers;
select from a multiple of Cursor buffers.
Table 12-2 Ink/Cursor Color Select
(An, Bn)
Color
Comments
00
Color 0
Ink/Cursor Color 0 Register, (REG[2Dh], REG[2Ch])
01
Color 1
Ink/Cursor Color 1 Register, (REG[2Fh], REG[2Eh])
10
Background
Ink/Cursor is transparent – show background
11
Inverted Background
Ink/Cursor is transparent – show inverted background
2 bpp:
A0
B0
A1
B1
A2
B2
A3
B3
Host Address
Ink/Cursor Buffer
A4
B4
A5
B5
A6
B6
A7
B7
bit 7
bit 0
Byte 0
Byte 1
Panel Display
P0 P1 P2 P3 P4 P5 P6 P7
Pn = (An, Bn)
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