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S5U1C63000H2 MANUAL EPSON 23
(S1C63 FAMILY IN-CIRCUIT EMULATOR)
CHAPTER 9: SPECIFICATIONS OF LCD BOARD
9.2 Precautions on Using
Follow the precautions described below to ensure that the LCD board board is used properly. Note,
however, that some functions described here may not be available with some models. For details, refer to
the technical manual for each model.
9.2.1 Notes on operations
Always be sure to power off all connected equipment before connecting or disconnecting the cable.
9.2.2 Difference from an actual IC
It is necessary to well know following differences from an actual IC on functions and characteristics.
Unless there are considered, successful operation on the S5U1C63000H2 with the LCD board may not be
reproduced on the actual IC.
(1) Initialization
In the actual IC, contents of the segment memory are indefinite at system reset and the LCD drive
waveform output is also indefinite in response to this. It means that the segment memory and the
LCD drive waveform are coincident even though both are indefinite. However, in this board, the
segment memory and the LCD drive waveform output are not coincident. Therefore, any initialization
routine that surely clears (or sets) the segment memory after the system reset must be installed.
(2) LCD segment RAM (for models that have fixed assignment of LCD segments to
memory bits)
In the actual IC, when reading a segment memory address that includes bits not assigned for LCD
segment, the non-assigned bits are always read as 0. However, in this board, the non-assigned bits in
the segment memory can be read and write as a memory. Therefore, when reading such address, the
non-assigned bits in the word (4 bits) must be ignored.
(3) Power supply range in external LCD power mode
When the LCD power is supplied from an external source in the external LCD power mode, following
voltage formula must be satisfied. These terminals are located in the connector of the peripheral
circuit board.
• For models that use V
SS as GND level
V
SS < VC1 < VC2 < VC3 < VC4 < VC5 ≤ VDD (= +5 V)
• For models that use VDD as GND level
V
SS < VL5 < VL4 < VL3 < VL2 < VL1 ≤ VDD (= +5 V)
(4) Drive capability of SEG and COM terminals
The output drive capability of the SEG and COM terminals in this board is higher than those of the
actual IC. The S5U1C63000H2 can not be used for evaluation of the electrical characteristics. The
system should be design in consideration of the electrical characteristics described on the technical
manual of each model.
(5) LCD drive voltage
The LCD drive voltage in this board may differ from that of the actual IC.