5

Integrated

Circuit

Systems, Inc.

ICS9214

0809F—11/05/07

Device ID and SMBus Device Address

The device ID (SMB_A(1:0)) is part of the SMBus device address. The least significant bit of the address designates a write

or read operation. Table 3 shows the addresses for four ICS9214 devices on the same SMBus.

PLL Multiplier

Table 2 shows the frequency multipliers in the PLL, selectable by programming the MULT0, MULT1 and MULT2 bits in the

SMBus Multiplier Control register. Power up default is 4.

Table 2. PLL Multiplier Selection

Bit 6

Bit 5

Bit 4

MULT2

MULT1

MULT0

00

03

400

00

14

533

0

1

0

5

500

667

0

1

1

6

600

800

10

08

800

1

0

1

9/2

450

600

1

1

0

15/2

750

1

1

1

15/4

375

500

NOTES

1 Output frequencies are based on nominal input frequencies of 100 MHz and 133 MHz. The PLL

multipliers are also applicable to spread spectrum modulated input clocks.

2 Default muliplier value at power up

3 Outputs at these settings do not conform to the AC Output Characteristics, or are not supported.

4 Shaded areas are under development and are not yet supported

Byte 0

Output Frequency (MHz)

Frequency

Multiplier

CLK_INT/C =

100 MHz

1

CLK_INT/C =

133 MHz

1

Table 3. SMBus Device Addresses

Device

Operation

SMB_A1

SMB_A0

WR#/RD

Write

D8

0

Read

D9

1

Write

DA

0

Read

DB

1

Write

DC

0

Read

DD

1

Write

DE

0

Read

DF

1

0

2

ICS9214

Hex Address

0

1

3

8-bit SMBus Device Address, Including Oper.

1

11011

1

0

01

10