Epson Research and Development
Page 15
Vancouver Design Center
Hardware Functional Specification
S1D13503
Issue Date: 01/01/29
X18A-A-001-08
3.4 Internal Block Diagram
Figure 6: Internal Block Diagram
3.5 Functional Block Descriptions
3.5.1 Bus Signal Translation
According to configuration setting VD2, Bus Signal Translation translates MC68000 type MPU signals, or READY type
MPU signals to internal bus interface signals.
3.5.2 Control Registers
The Control Register contains 16 internal control and configuration registers. These registers can be accessed by either
direct-mapping or by using the built-in internal index register.
3.5.3 Sequence Controller
The Sequence Controller generates horizontal and vertical display timings according to the configuration registers settings.
3.5.4 LCD Panel Interface
The LCD Panel Interface performs frame rate modulation and output data pattern formatting for both passive monochrome
and passive color LCD panels.
Bus
Control Registers
Signal
Translation
Port
Memory
Data Bus
Timing Generator
Sequence
Address
MPU/CRT
SRAM Interface
Lookup
LCD
Decoder
Decoder
Conversion
Oscillator
Power Save
Selector
Display
Data
Formatter
Generator
Table
Controller
Panel
Interface
LCDENB
UD[3:0]
LD[3:0]
LP, YD,
XSCL,
OS
C1
OS
C
2
VWE
#
VOE#
VA[1
5
:0
]
VCS
0
#,
VCS
1
#
VD[15
:0]
IOR#, IOW#, IOCS#,
MEMCS#, MEMR#,
MEMW#, BHE#,
AB[19:0]
READY
DB[15:0]
WF(XSCL2)
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