ICS952302 Datasheet, PDF (1/15 Pages) Integrated Circuit Systems – Frequency Generator for TransmetaTM

Integrated
Circuit
Systems, Inc.
ICS9523 0 2
Frequency Generator for Transmeta^TM Efficeon^TM
Recommended Application:
Transmeta Efficion, ATi M6
Output Features:
• 3 - CPUs @ 3.3V including 1 free running
CPUCLK_F
• 7 - PCI @ 3.3V, including 4 free running PCICLK_F
• 1 - 27MHz clock @ 3.3V
• 2 - 48MHz clocks @ 3.3V
• 2 - REF clocks @3.3V
Features:
• Support I2C Index read/write and block read/write
operations.
• Uses external 14.318MHz referience input or XTAL.
• Full Load Power consumption reduced >10%
compared to reference device
• Power management via SMBus
Key Specifications:
• CPU output jitter: < 250ps
• PCI output skew: < 250ps
• CPUT - PCI output skew: 1-3ns
• 27MHz Accuracy < 50ppm
• 48MHz Accuracy < 50ppm
Functionality
Byte 4b7
0
0
0
0
1
1
1
1
Byte 4b6
0
0
1
1
0
0
1
1
Byte 4b5
0
1
0
1
0
1
0
1
Spread
%
+/-0.3
+/-0.6
+/-0.25
+/-0.45
CENTER
-0.60%
-1.20% _DOWN
-0.50%
-0.90%
Pin Configuration
VDDREF 1
REF0 2
GNDREF 3
X1 4
X2 5
VDDPCI 6
PCICLK_F0 7
PCICLK_F1 8
GNDPCI 9
PCICLK0 10
PCICLK1 11
PCICLK_F2 12
PCICLK_F3 13
VDDPCI 14
PCICLK2 15
GNDPCI 16
N/C 17
N/C 18
VDDCOR 19
PCI_STOP# 20
**PD# 21
GND48 22
SDATA 23
SCLK 24
48-TSSOP
* Internal Pull-Up Resistor
**No Diode Clamp to VDD
48 REF1
47 VDDCPU
46 N/C
45 CPUCLK0
44 GNDCPU
43 CPUCLK1
42 CPUCLK_F
41 CPU_STOP#
40 GND
39 N/C
38 OE*
37 N/C
36 VDD
35 N/C
34 VDD27
33 GND
32 27MHZ
31 N/C
30 N/C
29 N/C
28 GND48
27 VDD48
26 48MHZ_1
25 48MHZ_0
0957B—10/05/04