MK2745-21S View Datasheet(PDF) - Integrated Circuit Systems
Part Name
Description
Manufacturer
MK2745-21S Datasheet PDF : 4 Pages
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MK2745-21
DVD/MPEG Clock Source
Pin Assignment
PS1
X2
X1/ICLK
VDD
GND
ACLK
PCLK
AS2
MK2745-21
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
PS0
24.576M
PCLK/2
VDD
AS1
GND
27M
AS0
Audio Clock (in MHz)
Decoding Table
AS2 AS1 AS0
000
001
010
011
100
101
110
111
ACLK
12.288
11.2896
8.192
24.576
8.192
16.9344
18.432
11.2896
16 pin (150 mil) SOIC
Processor Clock (in MHz)
PS1 PS0
00
01
10
11
PCLK
66.66
80
50
60
PCLK/2
33.33
40
25
30
0 = connect directly to ground
1 = connect directly to VDD
Pin Descriptions
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Name
PS1
X2
X1/ICLK
VDD
GND
ACLK
PCLK
AS2
AS0
27M
GND
AS1
VDD
PCLK/2
24.576M
PS0
Type
I
XO
XI
P
P
O
O
I
I
O
P
I
P
O
O
I
Description
Processor clock Select 1. Selects processor clock outputs per table above.
Crystal connection. Connect to 27 MHz crystal. Leave unconnected for clock input.
Crystal connection. Connect to 27 MHz crystal or connect to 27 MHz input clock.
Connect to +3.3 V or +5 V. Must be same as other VDD.
Connect to ground.
Audio Clock output. Determined by status of AS2, AS1, AS0. See table above.
Processor Clock output. Determined by status of PS1, PS0. See table above.
Audio clock Select 2. Selects audio clock on pin 6 per table above.
Audio clock Select 0. Selects audio clock on pin 6 per table above.
27.00 MHz clock output.
Connect to ground.
Audio clock Select 1. Selects audio clock on pin 6 per table above.
Connect to +3.3 V or +5 V. Must be same as other VDD.
Processor Clock divided by two output. Determined by status of PS1, PS0. See table above.
24.576 MHz clock output.
Processor clock Select 0. Selects processor clock outputs per table above.
Key: I = Input, O = output, P = power supply connection
MDS 2745-21 B
2
Revision 120400
Printed 12/5/00
Integrated Circuit Systems, Inc.•525 Race Street•San Jose•CA•95126•(408)295-9800tel•www.icst.com
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