Philips Semiconductors
900 MHz transmit modulator and 1.3 GHz
fractional–N synthesizer
Objective specification
SA9024
Table 3.
Main and auxiliary chargepump currents
CP1
CP0
0
0
IPHA
1.5xlset
0
1
0.5xlset
1
0
1.5xlset
1
1
0.5xlset
NOTES
1. ISET = Vset/RN; bias current for charge pumps.
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
IPHP
3xIset
1xlset
3xlset
1xlset
IPHP–SU
15xlset
5xlset
15xlset
5xlset
IPHI_SU
36xlset
12xlset
0
0
Address
Power Control
M
Sleep
divider SE TM AD 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
xx x
x x x x 0 0 000 0
0000000
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.
1997 Aug 01
16