ICS94201DFLFT IDT, Integrated Device Technology Inc, ICS94201DFLFT Datasheet - Page 4

• Manufacturer Part Number: ICS94201DFLFT
• Description: IC FREQ GENERATOR PROGR 56-SSOP
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Frequency Generatorr

Specifications of ICS94201DFLFT

• Input: Crystal
• Output: Clock
• Frequency - Max: 500MHz
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 56-SSOP
• Frequency-max: 500MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 94201DFLFT

ICS94201
Notes:
1.
2.
3.
4.
5.
6.
7.
0428B - 11/28/05
The ICS clock generator is a slave/receiver, I
verification. Readback will support standard SMBUS controller protocol. The number of bytes to read back is defined
by writing to byte 6.
When writing to bytes 14 - 15, bytes 16 - 17 and bytes 18 - 20, they must be written as a set. If for example, only byte
14 is written but not 15, neither byte 14 or 15 will load into the receiver.
The data transfer rate supported by this clock generator is 100K bits/sec or less (standard mode)
The input is operating at 3.3V logic levels.
The data byte format is 8-bit bytes.
To simplify the clock generator I
must be accessed in sequential order from lowest to highest byte with the ability to stop after any complete byte has
been transferred. The Command code and Byte count shown above must be sent, but the data is ignored for those
two bytes. The data is loaded until a Stop sequence is issued.
At power-on, all registers are set to a default condition, as shown.
Func tionality & Frequenc y Select
Register
Output Control Registers
Byte Count Read Back Register
Latc hed Inputs Read Back
Register
W atchdog Control Regis ters
VCO Control S election B it
W atchdog Tim er Count Register
ICS Reserved Register
Device ID, Vendor ID & Revision ID
Registers
ICS Reserved Register
VCO Frequenc y Control Registers
Spread Spectrum Control
Registers
Output Dividers Control Registers
Group Skews Control Registers
Output Rise/Fall Time S elect
Registers
Register Name
Programmable System Frequency Generator
Brief I
2
C registers description for ICS94201
2
C interface, the protocol is set to use only Block-Writes from the controller. The bytes
Byte
8 Bit[6:0]
8 Bit[7]
11-12
14-15
16-17
18-20
21-23
1-5
10
13
24
0
6
7
9
2
C component. It can read back the data stored in the latches for
Output frequency, hardware / I
select, s pread spectrum & output enable
control register.
Active / inactive output control registers.
W riting to this register will c onfigure by te
count and how many byte will be read back.
Do not write 00
The inverse of the latched inputs level could
be read back from this regis ter.
W atchdog enable, watchdog status and
program mable 'safe' frequenc y' can be
configured in this register.
This bit selects whether the output
frequenc y is controled by hardware/by te 0
configurations or byte 14&15 programm ing.
W riting to this register will c onfigure the
number of seconds for the watchdog timer
to reset.
This is an unused register. W riting to this
register will not affect device functionality.
Byte 11 bit[3:0] is ICS vendor id - 0001.
Other bits in these 2 registers designate
device revision ID of this part.
Don't write into this register, writing 1's will
cause m alfunction.
These registers control the dividers ratio
into the phase detector and thus control the
VCO output frequency.
These registers control the s pread
percentage amount.
Changing bits in these regis ters result in
frequenc y divider ratio changes. Incorrect
configuration of group output divider ratio
can cause system malfunction.
Increment or decrement the group skew
amount as compared to the initial skew.
These registers will control the group rise
and fall time.
Description
4
H
to this byte.
2
C frequency
Pw d Default
See individual byte
See individual byte
See individual byte
See individual byte
See individual byte
See individual byte
hardware/byte 0
hardware/byte 0
hardware/byte 0
configuration
configuration
configuration
Depend on
Depend on
Depend on
des cription
des cription
des cription
des cription
des cription
des cription
000,0000
06
FF
00
00
0
H
H
H
H