W7020 Datasheet, PDF (25/36 Pages) List of Unclassifed Manufacturers – Bluetooth Radio Module

Preliminary Data Sheet
September 2000
Transmit and Receiver Application (continued)
Timing Information (continued)
Powerup Initialization
W7020 Bluetooth Radio Module
VCC
LPO OUT
(3.2 KHz)
POR_EXT IN
SYS_CLK OUT (13 MHz)
TX_CLK OUT (1 MHZ)
SYS_CLK AND TX_CLK OUTPUTS REMAIN
ACTIVE IF SYS_CLK_REQ IS HIGH HERE,
AFTER CONTROL:XOCTR BIT=1
POR OUT
SERIAL BUS INITIALIZATION (XO-TRIM REGISTER; CONTROL REGISTER:XOCTR BIT=1 AND LPO COARSE TRIM BITS AS REQ’D;
CHP CONTROL REGISTER=8(DEC); ENABLE REGISTER=191(DEC)
SI_CDI (AS REQUIRED)
SI_CMS (AS REQUIRED)
SI_CLK (AS REQUIRED)
SYS_CLK_REQ IN (HIGH)
SYS_CLK_REQ IN (LOW)
TX_ON IN (LOW)
RX_ON IN (LOW)
SYNT_ON IN (LOW)
XPO_N IN (LOW)
PHD_OFF IN (LOW)
2 ms
3.5 ms
350 ns
20 µs
to
200 µs
Figure 10. Powerup Initialization Sequence
Lucent Technologies Inc.
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