- SS-HQ1 Application Notes -
Ver.1.0.0 January 7, 2005
193
2-clock/ECK master–MCK PLL system configuration
This system comprises two clocks, with the encoding clock (ECK) serving as the master, and with PLL applied
to the system driving clock (MCK). The master signal is the encoding clock (ECK). Typically X’tal oscillation is
used as the MCK VCXO.
shows the system configuration.
presents the external input
signals.
Fig 12.2-2 Internal mode (2-clock MCK-PLL)
Table 12.2-11 External input signal (2-clock MCK-PLL)
Pin Name
Pin No
Input Signal
S0 44pin
EXVIDEOY 57pin
EXVIDEO
58pin
Connected to 3.3V
* In INT mode S0 (pin 44) is not controlled by SGMODE, so any I/O setting can be set. However, under the
CXD3172AR default values, S0 is set to input. Therefore, to set input, pull it up to 3.3V in accordance with
the system you are using.
CXD3172AR
42
43
88
87
86
ECK
(X'tal)
46
47
48
44
49
57
58
ES
CI
ES
CO
EC
K
PC
O
M
P
EXV
ID
EO
Y
EX
VID
E
O
S0
S1
S4
S3
S2
MCK
3.3V
LPF
(H-PLL)
VCXO