CP3BT10G38 National Semiconductor, CP3BT10G38 Datasheet - Page 72

• Manufacturer Part Number: CP3BT10G38
• Description: IC CPU RISC W/LLC&USB 100-LQFP
• Manufacturer: National Semiconductor

Specifications of CP3BT10G38

• Applications: Connectivity Processor
• Core Processor: CR16C
• Program Memory Type: FLASH (256 kB)
• Controller Series: CP3000
• Ram Size: 10K x 8
• Interface: Bluetooth, ACCESS.bus, Audio, UART, USB, Microwire/SPI
• Number Of I /o: 37
• Voltage - Supply: 2.25 V ~ 2.75 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *CP3BT10G38

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15.3
To power-up a Bluetooth system based on the CP3BT10
and LMX5251 devices, the following sequence must be per-
formed:
VDD
VCC
IOVCC
RESET#
RESET
RFCE
BBCLK
RFDATA
RFSYNC
SDAT
SCLK
SLE
1. Apply VDD to the LMX5251.
2. Apply IOVCC and VCC to the CP3BT10.
3. Drive the RESET# pin of the LMX5251 high a minimum
4. After internal Power-On Reset (POR) of the CP3BT10,
5. When the RFDATA pin is driven high, the LMX5251 en-
6. The Bluetooth baseband processor on the CP3BT10
7. In “normal” mode, the oscillator of the LMX5251 is con-
LMX5251
CP3000
of 2 ms after the LMX5251 and CP3000 supply rails are
powered up. This resets the LMX5251 and CP3BT10.
the RFDATA pin is driven high. The RFCE, RFSYNC,
and SDAT pins are in TRI-STATE mode. Internal pull-
up/pull-down resistors on the CCB_CLOCK (SCLK),
CCB_DATA
TX_RX_SYNC (RFSYNC) inputs of the LMX5251 pull
these signals to states required during the power-up
sequence.
ables its oscillator. After an oscillator start-up delay, the
LMX5251 drives a stable 12-MHz BBP_CLOCK
(BBCLK) to the CP3BT10.
now directly controls the RF interface pins and drives
the logic levels required during the power-up phase.
When the RFCE pin is driven high, the LMX5251
switches from “power-up” to “normal” mode and dis-
ables the internal pull-up/pull-down resistors on its RF
interface inputs.
trolled by the RFCE signal. Driving RFCE high enables
the oscillator, and the LMX5251 drives its BBP_CLOCK
(BBCLK) output.
CP3000
CP3000
LMX5251
Figure 21. LMX5251 Power-Up Sequence
LMX5251 POWER-UP SEQUENCE
LMX5251
Oscillator
Start-Up
High
Low
Low
Low
Low
Low
Power-Up Mode
t
PTOR
LMX5251 in
(SDAT),
Initialization
CP3000
Initialization
CCB_LATCH
LMX5251
LMX5251 in Normal Mode
Standby
High
(SLE),
Active
DS016
and
72
15.4
A Bluetooth system based on the CP3BT10 and LMX5252
devices has the following states:
The power-up sequence for a Bluetooth system based on
the CP3BT10 and LMX5252 devices is shown in Figure 23.
RFDATA = Don't Care
Off—When the LMX5252 enters Off mode, all configura-
tion data is lost. In this state, the LMX5252 drives BPOR
low.
Power-Up—When the power supply is on and the
LMX5252 RESET# input is high, the LMX5252 starts up
its crystal oscillator and enters Power-Up mode. After the
crystal oscillator is settled, the LMX5252 sends four
clock cycles on BRCLK (BBCLK) before driving BPOR
high.
RF Init—The baseband controller on the CP3BT10 now
drives RFCE high and takes control of the crystal oscilla-
tor. The baseband performs all the needed initialization
(such as writing the registers in the LMX5252 and crystal
oscillator trim).
Idle—The baseband controller on the CP3BT10 drives
RFDATA low when the initialization is ready. The
LMX5252 is now ready to start transmitting, receiving, or
enter Sleep mode.
Sleep—The LMX5252 can be forced into Sleep mode at
any time by driving RFCE low. All configuration settings
are kept, only the Bluetooth low power clock is running
(B3k2).
Wait XTL—When RFCE goes high, the crystal oscillator
becomes operational. When it is stable, the LMX5252
enters Idle mode and drives BRCLK (BBCLK).
Write Registers
RFCE = High
Crystal Osc.
To Stabilize
LMX5252 POWER-UP SEQUENCE
Wait for
Figure 22. LMX5252 Power States
Any State
Power-Up
RF Init
Off
RESET# = Low or
Power is cycled
RESET# = High and
Power is On
Crystal Osc. Stable
Crystal Osc.
To Stabilize
Wait for
Idle
Crystal Osc. Stable
After RF Init
Any State
Wait XTL
Sleep
RFCE = Low
RFCE = High
DS324