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EPSON
S1C60N13 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (LCD Driver)
(3) Output specification
The segment terminals (SEG0–SEG37) are selected by mask option in pairs for either segment signal
output or DC output (VDD and VSS binary output). When DC output is selected, the data corre-
sponding to COM0 of each segment terminal is output.
When DC output is selected, either complementary output or Pch open drain output can be selected
for each terminal by mask option.
Note: The terminal pairs are the combination of SEG (2
n) and SEG (2n + 1) (where n is an integer from 0 to 18).
(4) Drive bias
For the drive bias of the S1C60N13 or the S1C60L13, either 1/3 bias or 1/2 bias can be selected by the
mask option. When using the LCD system voltage regulator, it is fixed at 1/3 bias.
4.8.4 Control of LCD driver
Table 4.8.4.1 shows the LCD driver's control bits and their addresses. Figure 4.8.4.1 shows the display
memory map.
Table 4.8.4.1 Control bits of LCD driver
Address
Comment
D3
D2
Register
D1
D0
Name
Init 1
10
2E8H
CSDC1
ETI2
ETI8
ETI32
R/W
CSDC1
ETI2
ETI8
ETI32
0
Static
Enable
Dynamic
Mask
LCD drive switch
Interrupt mask register (clock timer 2 Hz)
Interrupt mask register (clock timer 8 Hz)
Interrupt mask register (clock timer 32 Hz)
2D0H
000
CSDC2
R
R/W
0 3
CSDC2
– 2
1
–
Normal
–
All off
Unused
LCD all off control
1
2
Initial value at initial reset
Not set in the circuit
3
4
Always "0" being read
Reset (0) immediately after being read
5 Undefined
Address
Page
Low
High
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0 or 2
4
5
6
Display memory (38 words
× 4 bits)
Page 0: R/W, Page 2: W only
Unused area
Fig. 4.8.4.1 Display memory map
CSDC2: LCD all Off control (2D0HD0)
Controls the LCD display.
When "1" is written : LCD displayed
When "0" is written : LCD is all off
Read-out : Valid
By writing "0" to the CSDC2 register, all the LCD dots goes off, and when "1" is written, it returns to
normal display.
Writing "0" outputs an off waveform to the SEG terminals, and does not affect the content of the display
memory.
After an initial reset, CSDC2 is set to "1".
CSDC1: LCD drive switch (2E8HD3)
The LCD drive format can be selected with this switch.
When "1" is written : Static drive
When "0" is written : Dynamic drive
Read-out : Valid
At initial reset, dynamic drive (CSDC1 = "0") is selected.