Clock Synthesizer And Clock Options; Clock Programming - Epson S5U13A05B00C User Manual

Clock Synthesizer and Clock Options

7 Clock Synthesizer and Clock Options
For maximum flexibility, the S5U13A05B00C implements a Cypress ICD2061A Clock
Synthesizer. MCLKOUT from the clock synthesizer is connected to CLKI2 of the
S1D13A05 and VCLKOUT from the clock synthesizer is connected to CLKI of the
S1D13A05. A 14.31818MHz crystal (Y1) is connected to XTALIN and XTALOUT of the
clock synthesizer and provides the reference clock to the clock synthesizer.
At power-on, CLKI2 (MCLKOUT) is configured at 40MHz and CLKI (VCLKOUT) is
configured at 25.175MHz.
Note

7.1 Clock Programming

The S1D13A05 utilities automatically program the clock generator. If manual
programming of the clock generator is required, refer to the source code for the S1D13A05
utilities available on the internet at vdc.epson.com.
For further information on programming the clock generator, refer to the Cypress
ICD2061A specification.
Note
22
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Synthesizer reference
14.31818 MHz
Figure 7-1: Symbolic Clock Synthesizer Connections
If a Sharp HR-TFT panel is selected, the clock synthesizer cannot be programmed, and
external oscillators must provide the clock signals to CLKI and CLKI2. Jumpers JP1
and JP2 allow selection of external oscillators U7 and U8 as the clock source for both
CLKI and CLKI2. For further information, see Table 3-2: "Jumper Summary" on page
9.
When CLKI and CLKI2 are programmed to multiples of each other (e.g. CLKI =
20MHz, CLKI2 = 40MHz), the clock output signals from the Cypress clock generator
may jitter. Refer to the Cypress ICD2061A specification for details.
To avoid this problem, set CLKI and CLKI2 to different frequencies and use the
S1D13A05 internal clock divides to obtain the lower frequencies.
Seiko Epson Corporation
ICD2061A
XTALIN
MCLKOUT
VCLKOUT
S5U13A05B00C Rev 1.0 Evaluation Board
CLKI2
CLKI
Rev. 1.1