mk1493-05 Integrated Device Technology, mk1493-05 Datasheet - Page 7

• Manufacturer Part Number: mk1493-05
• Description: Differential Spread Spectrum Clock Driver
• Manufacturer: Integrated Device Technology

Byte 6: Control Register
Notes:
1. These bits are read-only when the hardware/software bit is set to hardware control.
2. When the hardware/software bit is set to hardware control these bits reflect the state of the S[3:1] and SEL100/96#
pins and the SO bit is set to zero. When the hardware/software bit is set to software control the S[3:1] and SEL100/96# pins
are overridden by these bits.
3. See Spread Spectrum Selection Table on page 2 for spread selection options.
4. Use the same vendor ID as is used for the CK408 clock chip.
Power Down Mode Operation
CLKOUT is driven differentially when PWRDWN# is de-asserted unless the CLKOUT is disabled through the SMBus register
bit.
IDT™ DIFFERENTIAL SPREAD SPECTRUM CLOCK DRIVER
MK1493-05
DIFFERENTIAL SPREAD SPECTRUM CLOCK DRIVER
Bit
7
6
5
4
3
2
1
0
The Power Down pin is used to shut off the clock cleanly prior to shutting off power to the device. The power down
pin is an active high asynchronous input. When PWRDWN is sampled low for two output clock periods then all
clocks need to be stopped prior to turning off the VCO. ALL clocks need to be stopped in a predictable manner.
C LK V C O
C LK O U T/
R E FO U T
P W R D N
C LKO U T
C LK IN
Revision ID bit 3
Revision ID bit 2
Revision ID bit 1
Revision ID bit 0
Vendor ID bit 3
Vendor ID bit 2
Vendor ID bit 1
Vendor ID bit 0
Description
Type
R
R
R
R
R
R
R
R
O N
Power Up
--
--
--
--
--
--
--
--
7
TpH Z
Output(s) Affected
Not applicable
Not applicable
Not applicable
Not applicable
Not applicable
Not applicable
Not applicable
Not applicable
O FF
MK1493-05
CLOCK SYNTHESIZER
Notes
4
4
4
4
REV G 011608