Philips Semiconductors

Product specification

PCK2010R

CK98R (100/133MHz) RCC spread spectrum

system clock generator

1999 Oct 19

3

PIN DESCRIPTION

PIN NUMBER

SYMBOL

FUNCTION

2,3

REF [0–1]

3.3 V 14.318 MHz clock output

5

XTAL_IN

14.318 MHz crystal input

6

XTAL_OUT

14.318 MHz crystal output

8

PCICLK_F

3.3 V free running PCI clock

9, 11, 12, 14, 15, 17, 18

PCICLK [1–7]

3.3 V PCI clock outputs

21, 22, 25, 26

3V66 [0–3]

3.3 V fixed 66 MHz clock outputs

28

SEL133/100

Select input pin for enabling 133 MHz or 100 MHz CPU outputs.

H = 133 MHz, L = 100 MHz

30

48 MHz USB

3.3 V fixed 48 MHZ clock output

32, 33

SEL [0–1]

Logic select pins. TTL levels.

34

SPREAD

3.3 V LVTTL input. Enables spread spectrum mode when held LOW.

35

PWRDWN

3.3 V LVTTL input. Device enters powerdown mode when held LOW.

36

CPUSTOP

3.3 V LVTTL input. Stops all CPU clocks and 3V66 clocks when held LOW. CPUDIV_2

output remains on all the time.

37

PCISTOP

3.3 V LVTTL input. Stops all PCI clocks except PCICLK_F when held LOW.

41, 42, 45, 46

CPUCLK [0–3]

2.5 V CPU output. 133 MHz or 100MHz depending on state of input pin SEL133/100.

49, 50

CPUDIV_2 [0–1]

2.5 V output running at 1/2 CPU clock frequency. 66 MHz or 50 MHz depending on

state of input pin SEL133/100.

53, 54, 55

IOAPIC [0–2]

2.5 V clock outputs running divide synchronous with the CPU clock frequency. Fixed

16.67 MHz limit.

4, 10, 16, 23, 27, 31, 39

3.3 V power supply.

1, 7, 13, 19, 20, 24, 29,

38, 40, 44, 48, 52

Ground

43, 47, 51, 56

2.5 V power supply

NOTE: