Hardware Functional Specification - SE Spezial-Electronic AG

Page 50 Epson Research and Development
Vancouver Design Center
REG[05h] Frame Height Register
Address = 8005h Read/Write
Frame Height bits 7-0
7 6 5 4 3 2 1 0
bits 7-0 Frame Height (L/F) bits [7:0]
These bits determine the frame height, in lines. The maximum frame height is 256 lines.
REG[05h] bits 7-0 = frame height in lines - 1.
Note
If the Panel Drive Select bit is set for a dual drive panel (REG[00h] bit 3 = 1), the frame
height must be an even number of lines resulting in an odd number value for REG[05h]
bits 7-0.
REG[06h] Horizontal Address Range Register 0
Address = 8006h Read/Write
Horizontal Address Range bits 7-0
7 6 5 4 3 2 1 0
REG[07h] Horizontal Address Range Register 1
Address = 8007h Read/Write
Horizontal Address Range bits 15-8
7 6 5 4 3 2 1 0
bits 15-0 Horizontal Address Range (AP) bits [15:0]
These bits define the horizontal address range of the virtual screen. The maximum value
for this register is 7FFFh.
REG[07h] bits 7-0, REG[06h] bits 7-0 = Addresses per line
The following diagram demonstrates the relationship between the Horizontal Address
Range and the Character Bytes Per Row value.
C/R
Display memory limit
Figure 10-5 Horizontal Address Range and Character Bytes Per Row Relationship
S1D13700F00 Hardware Functional Specification
X42A-A-001-04 Issue Date: 2004/10/18
Revision 4.0
Display area
AP
Where:
C/R = character bytes per row (REG[03h] bits 7-0)
AP = horizontal address range (REG[06h] bits 7-0, REG[07h] bits 7-0)