S1T8825B

1.3GHZ DUAL PLL

6

CONTROL LATCH

The control register executes the following functions:

•

Mode selection (H: test mode, L: normal mode)

•

Charge pump’s polarity and output current selection for each channel.

•

Output state selection for Lock Detector.

•

Standby control of each channel and reference divider.

•

ON / OFF control in filter switch.

Figure 2.

Bit

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

Name

T

CP

CP1

CP2

SB1

CP1

CP2

Description

test mode

charge

pump

output

polarity

channel 1

charge

pump

output

current

channel 1

charge

pump

output

current

channel 1

standby

channel 2

charge

pump

output

current

channel 2

charge

pump

output

current

Bit

Bit 8

Bit 9

Bit 10

Bit 11

Bit 12

Bit 13

Bit 14

Name

SB2

SBR

LD1

LD2

SW

GC2

GC1

Description

channel 2

standby

reference

divider

standby

lock

detector

control 1

lock

detector

control 2

filter switch

group code

“0”

group code

“0”

T

CP

CP1

CP2

CP1

SB1

SB2

CP2

SBR

LD1

LD2

SW

GC2

"0"

GC1

"0"

MSB

Group Code

CH1

CH2

LSB