S1D12200 Epson Electronics America, Inc., S1D12200 Datasheet - Page 23
S1D12200
Manufacturer Part Number
S1D12200
Description
S1d12000 Series Lcd Driver Ic Technical Manual Technical Manual
Manufacturer
Epson Electronics America, Inc.
Datasheet
1.S1D12200.pdf
(260 pages)
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S1D12200 Series
6. FUNCTIONAL DESCRIPTION
MPU Interface
Selection of interface type
In the S1D12200 Series, data transfer is performed through a 8-bit or 4-bit data bus or a serial data input (SI). By selecting
HIGH or LOW as P/S pin polarity, a parallel data input or a serial data input can be selected as shown in Table 1.
Parallel Input
In the S1D12200 Series, when parallel input is selected (P/S = HIGH), it can be directly connected to the 80 series MPU
bus or 68 series MPU bus, as shown in Table 2, if either HIGH or LOW is selected as RES pin polarity after a reset input,
because the RES pin has an MPU select function.
Selection between 8 bits and 4 bits is performed by command.
Interface with 4-bit MPU interface
When data transfer is performed by 4-bit interface (IF = 0), an 8-bit command, data and address are divided into two parts.
Note: When performing writing in succession, reverse a time exceeding the system cycle time (t
Serial interface (P/S = LOW)
The serial interface consists of a 8-bit shift register and a 3-bit counter and acceptance of an SI input or SCL input is enabled
in the ship selected status (CS = LOW).
When no chip is selected, the shift register and counter are reset to the initial status.
Serial data is input in the order of D7, D6 .... D0 from the serial data input pin (SI) at the rise of Serial Clock (SCL).
At the rising edge of the 8th serial clock, the serial data is converted into 8-bit parallel data and this data is processed.
The A0 input is used to identify whether the serial data input (SI) is display data or a command. That is, when A0 = HIGH,
it is regarded as display data. When A0 = LOW, it is regarded as a command.
The A0 input is read in and identified at the rise of the 8 x n-th clock of Serial Clock (SCL) after chip selection.
Fig. 1 shows a timing chart of the serial interface.
Regarding the SCL signal, special care must be exercised about terminal reflection and external noise due to a wire length.
We recommend the user to perform an operation check with a real machine.
We also recommend the user to periodically refresh the write status of each command to prevent a malfunction due to noise.
D7 to D4
2–14
WR
perform writing.
CS
RES input polarity
HIGH
LOW
P/S
active
active
Parallel Input
Serial Input
Type
Upper (D7 to D4)
CS
CS
CS
68 series
80 series
Type
A0
A0
A0
EPSON
Table 1
Table 2
HIGH, LOW
WR
WR
A0
A0
A0
WR
WR
SI
—
SI
E
Lower (D3 to D0)
SCL
SCL
CS
CS
CS
—
D0 to D7
D0 to D7
D0 to D7
D0 to D7
D0 toD7
cyc
—
) and then
Rev. 1.4
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