Philips Semiconductors

Objective specification

SA9024

900 MHz transmit modulator and 1.3 GHz

fractional–N synthesizer

1997 Aug 01

16

Table 3.

Main and auxiliary chargepump currents

CP1

CP0

0

0

1.5xlset

3xIset

15xlset

36xlset

0

1

0.5xlset

1xlset

5xlset

12xlset

1

0

1.5xlset

3xlset

15xlset

0

1

1

0.5xlset

1xlset

5xlset

0

NOTES

2. CP1 is used to disable the PHI pump.

3. Iphp_su is the total current out of PHP in speedup mode.

D word, length 24 bits

Address

Power Control

M

divider

SE

TM

AD

Sleep

Mode

Test pa_current

1

1

0

PC7

PC6

PC5

PC4

PC3

PC2

PC1

PC0

M1

M0

SE

TM

AD

SM1

SM2

pai5

pai4

pai3

pai2

pai1

pai0

Default:

x

x

x

x

x

x

x

x

0

0

0

0

0

0

0

0

0

0

0

0

0

D0 word select

Fixed to 110.

Output Power Control

PC7(msb)...PC0(Isb)

Provides output power attenuation for DUAL mode amplifier outputs in 0.18 dB steps, Fx = 45.9 dB.

M Divider

00 = 6, 01 = 7, 10 = 8, 11 = 9

Offset loop power down

SE Offset loop synthesizer power down, SE = 1 power on, SE = 0 power down (sleep mode).

DUAL mode select

TM = 0 DUALmode

AMPS/DAMPS mode select

AD = 1

DAMPS mode.

AD = 0

AMPs mode

TX buffers power down

SM1

TX Local oscillator buffers power down. SM1 = 1 power on, SM1 = 0 to power down.

SM2

RCLK buffer power down. SM2 = 1 power on, SM2 = 0 to power down.

Test: pa_current:pai

TX test bits for controlling the current in the power amp. Should be 0 during normal operation.