S1D13742 Epson, S1D13742 Datasheet - Page 66

• Manufacturer Part Number: S1D13742
• Description: Mobile Graphics Engine
• Manufacturer: Epson

Page 66
9.3.7 Memory Access
REG[48h] bits 7-0
REG[49h] bits 7-0
S1D13742
X63A-A-001-06
REG[48h] Memory Data Port Register 0
Default = XXh
REG[49h] Memory Data Port Register 1
Default = XXh
7
7
6
6
Note
Note
Note
Note
Memory Data Port bits [7:0]
These specify the lsb for the data word
Memory Data Port bits [15:8]
These bits specify the msb of the data word.
If CNF1=0 (8-bit interface), REG[49h] is not used.
The data read back from memory will be byte swapped (i.e. if 12 34 56 78 is written to
memory, data read back will be 34 12 78 56).
Burst data writes are supported through this register. Register auto-increment is auto-
matically disabled once reaching this address. All writes to this register will auto-incre-
ment the internal memory address only.
Panel dimension registers must be set before writing any window data.
Upon writing the last pixel in the defined window, this register will automatically point
back to the first pixel in the window. Therefore there is no need to re-initialize the point-
ers.
5
5
Revision 6.01 - EPSON CONFIDENTIAL
Memory Data Port bits [15:8]
Memory Data Port bits [7:0]
4
4
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3
3
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2
2
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Epson Research and Development
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Hardware Functional Specification
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Vancouver Design Center
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Issue Date: 2007/09/18
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Read/Write
Read/Write
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