THCV231_16 Datasheet, PDF (11/56 Pages) THine Electronics, Inc. – The THCV231 and THCV236 are designed to support video data transmission between the host and display.

Spread Spectrum Clock Generator (SSCG)
The THCV231 serial data output and the THCV236 parallel data and clock outputs are modulated by
programmable SSCG. The THCV231 and THCV236 SSCG are enabled by only SSEN register. The modulation
rate and modulation frequency variation of output spread is controlled through the SSCG control registers on
each device. Do not enable spread spectrum for both the THCV231 and THCV236 at the same time.
Table 6. SSCG enable signal
Mode Entry Signal
SSEN(register)
Description
0:SSCG Disable
1:SSCG Enable
When customer use the mode and frequency range shown in Table 7, register setting is required according to
Table 8.
Table 7. Main-Link mode and frequency range requiring register setting
MAINMODE
1
1
1
1
*1 Don’t care
*2 See Table 8
Mode Setting
HFSEL
0
0
0
1
COL1
0
0
1
(*1)
COL0
0
1
0
(*1)
Freq.Range[MHz]
(SSCG Enable)
min
max
26.6
40
26.6
50
33.3
66.6
50
100
Register
Setting
(*2)
Case1
Case1
Case2
Case3
Step
1
2
3
4
Register Address(HEX)
Sub-Link
Master side
Sub-Link
Slave side
0x70
0xF0
0x76
0xF6
0x78
0xF8
0x7C
0xFC
Table 8. SSCG register setting
Register Value(HEX)
Case1 Case2
Case3
THCV231
THCV236
0x01
0x02
0x02
0x01
0x3C
0x30
0x20
0x35
0x34
0x24
Description
Set 1 to PLL_SET_EN
Set PLL_SET0
Set PLL_SET1
Set PLL_SET2
Modulation frequency f_mod can be determined by HFSEL and LFSEL settings, input clock frequency and
FMOD register setting (default value 0xD). Refer to following formula.
f _mod

f _{CLKS S CG}
128 FMOD
f_CLKSSCG is the frequency listed in Table 9 and Table 10.
THCV231_THCV236_Rev.2.30_E
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