
MK1631
VCD with NTSC/PAL Clock Source
MDS1631B
2
Revision 12047
Printed 12/4/97
MicroClock Division of ICS1271 Parkmoor Ave.San JoseCA95126(408)295-9800tel(408)295-9818fax
ICRO
CLOCK
Number
Name
Type Description
1
PS1
I
Processor Clock Select 1. Determines PCLK outputs per table above.
2
X2
O
Crystal connection. Leave unconnected for clock input, or connect to 16.9344 MHz crystal.
3
X1/ICLK
I
Crystal connection. Connect to 16.9344 MHz crystal, or clock input
4
VDD
P
Connect to +5V.
5
GND
P
Connect to ground.
6
27M
O
27.00 MHz clock output.
7
CLK2
O
Clock 2 for NTSC/PAL encoders. Determined by C2S per table above.
8
CLK2/2
O
Clock 2 output divided by 2. Determined by C2S per table above.
9
CLK2/8
O
Clock 2 output divided by 8 for subcarrier frequencies. Determined by C2S per table above.
10
PCLKB
O
Processor Clock outputs. Determined by PS0, PS1 per table above.
11
GND
P
Connect to ground.
12
C2S
I
Clock 2 Select. Determines CLK2 output per table above.
13
VDD
P
Connect to +5V.
14
16.9M
O
16.9344 MHz buffered crystal oscillator output.
15
PCLKA
O
Processor Clock outputs. Determined by PS0, PS1 per table above.
16
PS0
I
Processor Clock Select 0. Determines PCLK outputs per table above.
Pin Descriptions
Type: I = Input, O = output, P = power supply connection
Pin Assignment
Processor Clock Decoding Table (MHz)
1
16
2
3
4
15
14
13
VDD
GND
X2
VDD
GND
16 pin (150 mil) SOIC
5
6
7
8
12
11
10
9
CLK2/2
16.9M
X1/ICLK
27M
PS1
PS0
PCLKA
C2S
CLK2/8
CLK2
PCLKB
PS1 PS0
PCLKA
PCLKB
0
32
16
0
1
20
10
1
0
33.8688
16.9344
1
40.5
4
Processor Clock
C2S
CLK2
CLK2/2
CLK2/8
0
28.63636
14.31818
3.57954
1
35.46895
17.73447
4.43362
Clock 2 MK1631-01
All Clock frequencies are in MHz.