CS2200-CP Datasheet, PDF (19/26 Pages) Cirrus Logic – Fractional-N Frequency Synthesizer

CS2200-CP
8. REGISTER DESCRIPTIONS
In I²C Mode all registers are read/write unless otherwise stated. In SPI mode all registers are write only. All “Re-
served” registers must maintain their default state to ensure proper functional operation. The default state of each
bit after a power-up sequence or reset is indicated by the shaded row in the bit decode table and in the “Register
Quick Reference” on page 18.
Control port mode is entered when the device recognizes a valid chip address input on its I²C/SPI serial control pins
and the EnDevCfg1 and EnDevCfg2 bits are set to 1.
8.1 Device I.D. and Revision (Address 01h)
7
Device4
6
Device3
5
Device2
4
Device1
3
Device0
2
Revision2
1
Revision1
0
Revision0
8.1.1
Device Identification (Device[4:0]) - Read Only
I.D. code for the CS2200.
Device[4:0]
00000
Device
CS2200.
8.1.2
Device Revision (Revision[2:0]) - Read Only
CS2200 revision level.
REVID[2:0]
100
Revision Level
B2.
8.2 Device Control (Address 02h)
7
Unlock
6
Reserved
5
Reserved
4
Reserved
3
Reserved
8.2.1
Unlock Indicator (Unlock) - Read Only
Indicates the lock state of the PLL.
Unlock
0
1
PLL Lock State
PLL is Locked.
PLL is Unlocked.
2
Reserved
1
AuxOutDis
0
ClkOutDis
8.2.2
Auxiliary Output Disable (AuxOutDis)
This bit controls the output driver for the AUX_OUT pin.
AuxOutDis
0
1
Application:
Output Driver State
AUX_OUT output driver enabled.
AUX_OUT output driver set to high-impedance.
“Auxiliary Output” on page 14
DS759PP1
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