M
ODEL
SL599 V
ERSION
V_1.0
P
REPARED BY
H/W
D
ATE
2007.04.11
S
UBJECT
T
ECHNICAL
M
ANUAL
P
AGE
30/52
SL599
T
ECHNICAL
M
ANUAL
Figure 26. BSI Unit block diagram and Timing Characteristic.
8.2
Baseband Parallel Interface
The Baseband Parallel Interface features a 10-pin output bus used for timing-critical control of the external
circuits. These pins are typically used to control front-end components at the specified time along the GSM time-
base, such as transmit-enable(PA_EN), band switching(BANDSW_DCS), TR-switch(LB_TX, HB_TX), etc.
Figure 27. Baseband Parallel Interface Block Diagram.