CS18102X datasheet(15/54 Pages) CIRRUS

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CobraNet Hardware User’s Manual

Pinout and Signal Descriptions

DS651UM23

Version 2.3

4.2.7 System Signals

Use these CS1810xx/CS4961xx signals stricktly in the manner described in

CM-2

Schematics (Section 9.2 on page 44). Each signal is briefly described below.

Signal

Description

CS1810xx/CS4961xx

Pin #

VCXO_CTRL

A Delta-sigma DAC Output for Controlling the On-board VCXO

MCLK_SEL

Control Signal for Selecting MCLK Sources

DBDA, DBCK

I2C Debugger Interface

3, 4

TEST

Used for testing during manufacturing. Keep grounded for normal

operation.

DATA[15:0]

Data Bus for Flash & Ethernet Controller(s)

29-32, 34, 35, 37, 39-43,

45, 46, 48, 49

ADDR[19:0]

Address Bus for Flash & Ethernet Controller(s)

55, 56, 58, 59, 61, 62, 64,

67, 68, 70-72, 74, 75, 77,

82, 84, 85, 87, 88

Write Enable for Flash and Ethernet Controller(s)

CS1

Chip Select for Flash Memory Device

CS2

Chip Select for Ethernet Controller(s)

Output Enable

IOWAIT

Wait State Signal from Ethernet Controller(s)

GPIO[2:0]

General-purpose I/O Signals

99, 100, 108

XTI

Reference Clock Input / Crystal Oscillator Input

125

XTO

Crystal Oscillator Output

124

XTAL_OUT

A Buffered Version of XTI

123

FILT2, FILT1

PLL Loop Filter

127, 128

DAO_MCLK

MCLK Input

HS[3:0]

CS1810xx/CS4961xx Boot Mode Selection

11, 16, 17, 19

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