ICS9LPRS477D datasheet(1/27 Pages) RENESAS

部件名	ICS9LPRS477D

功能描述	PROGRAMMABLE SYSTEM CLOCK CHIP FOR ATI RD790-K8TM BASED SYSTEMS

PDF	27 Pages

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制造商	RENESAS [Renesas Technology Corp]

网页	http://www.renesas.com

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DATASHEET

PROGRAMMABLE SYSTEM CLOCK CHIP FOR ATI RD790-K8TM BASED SYSTEMS

9LPRS477D

IDT®

PROGRAMMABLE SYSTEM CLOCK CHIP FOR ATI RD790-K8TM BASED SYSTEMS

1

9LPRS477D

REV C 010715

General Description

The 9LPRS477D is a main clock synthesizer chip that

provides all clocks required for ATI RD7xx-based systems

using AMD processors. An SMBus interface allows full

control of the device.

Recommended Application

ATI RS780/RS790/RD790/RS880 systems using AMD K8

processors

Output Features

• 2 - Greyhound compatible K8 CPU pairs

• 6 - low-power differential SRC pairs

• 2 - low-power differential SouthBridge SRC pairs

• 4 - low-power differential ATIG pairs

• 1 - Selectable low-power differential 100MHz non-spread

SATA/ SRC output

• 1 - Selectable 100MHz low-power differential/ 66 MHz

single-ended HTT clock

• 2 - 48MHz USB clocks

• 3 - 14.318MHz Reference clocks

Features/Benefits

• CPU, ATIG, SB_SRC and SRC outputs are

independently programmable for frequency

• Spread Spectrum for EMI reduction

• Outputs may be disabled via SMBus

• External crystal load capacitors for maximum frequency

accuracy

• Meets PCIEX Gen2 specifications

• Meets 30kHz to 33kHz SRC modulation rate specification

for USB3.0

Key Specifications

• CPU outputs cycle-to-cycle jitter < 85ps

• SRC outputs cycle-to-cycle jitter < 125ps

• ATIG outputs cycle-to-cycle jitter < 125ps

• ± 300ppm frequency accuracy on CPU, SRC & ATIG

clocks

Pin Configuration

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

**SEL_DOC/48MHz_1 1

48 VDDCPU

**SEL_CPU1#/48MHz_0 2

47 GNDCPU

GND48 3

46 CPUKG1T_LPRS/SRC7T_LPRS

SMBCLK 4

45 CPUKG1C _LPRS/SRC7C_LPRS

SMBDAT 5

44 VDDA

**DOC_0/SRC5C_LPRS 6

43 GNDA

**DOC_1/SRC5T_LPRS 7

42 GNDSATA

SRC4C_LPRS 8

41 SRC6T/SATAT_LPRS

SRC4T_LPRS 9

40 SRC6C/SATAC_LPRS

GNDSRC 10

39 VDDSATA

VDDSRC 11

38 ATIG0T_LPRS

SRC3C_LPRS 12

37 ATIG0C_LPRS

SRC3T_LPRS 13

36 ATIG1T_LPRS

SRC2C_LPRS 14

35 ATIG1C_LPRS

SRC2T_LPRS 15

34 VDDATIG

VDDSRC 16

33 GNDATIG

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

ICS9LPRS477D

64-Pin MLF

* Internal Pull-Up Resistor

** Internal Pull-Down Resistor

类似零件编号 - ICS9LPRS477D

制造商	部件名	数据表	功能描述
Renesas Technology Corp	ICS9LPRS477C	416Kb / 25P	Programmable System Clock Chip for ATI RD790 - K8TM Based Systems 1393 01/28/14

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