LMX9820 National Semiconductor, LMX9820 Datasheet - Page 20

• Manufacturer Part Number: LMX9820
• Description: Bluetooth Serial Port Module
• Manufacturer: National Semiconductor

www.national.com
9.0 System Power-Up Sequence
In order to correctly power-up the LMX9820 the following
sequence must be performed:
Apply IOVCC and VCC to the LMX9820.
Symbol
t
PTOR
TX_RX_SYNC
TX_RX_DATA
CCB_CLOCK
BBP_CLOCK
Reset_5100#
CCB_LATCH
CCB_DATA
Reset_b#
Parameter
Power to Reset
IOVCC
VCC
Table 24. LMX9820 System Power-up Sequence Timing
Low
Figure 14. LMX9820 System Power-Up Sequence Timing
LMX9820
Oscillator
Start-Up
tPTOR
High
Low
Low
Low
Low
High
Power-Up Mode
LMX9820 in
Initialization
LMX9820
Condition
V
voltage level to valid reset
CC
and IO
20
VCC
Initialization
LMX9820
The Reset_b# and Reset_5100# of the LMX9820 should
be driven high minimum of 2ms after the LMX9820 voltage
rails are high. The LMX9820 is properly reset.
Reference Table 24 on page 20.
at operating
LMX9820 in Normal Mode
Standby
Min
2
Typ
Active
Max
Unit
ms