System hardware work on Nokia BB5

[faisal4friend]

TAHVO

EM is TAHVO including ASIC function block:
CORE-supply generation (VCORE & VCOREA)
Level-shifter and regulator for USB / FBUS
Battery-control processes such as the charging
External LED-driver control interface
-Digital interface (CBUS)
-TAHVO ASIC does not have any security function of the withdrawal UEM (E, K)


CMT Flash

CMT Flash memory used to store:
-MCU program code
DSP-prgram code
-Tuning Values
-Certificates
Capacity-64Mbit
Logic-supply voltage and for NOR Flash in the output from the VIO (1.8V)
Flash Clock is 48Mhz (192Mhz / 4)

CMT SDRAM

CMT SDRAM is dinamic data storage for the MCU data
Capacity 64MBit
SDRAM core voltage (1.8v) output by the regulator RETU VDRAM
Voltage I / O (1.8) in the output by RETU VIO regulator
SDRAM clock is 96Mhz (192Mhz / 2)


OMAP

OMAP is an application of the system running with Symbian (EPOC)

Platform for ease of use application, the basic interface (Main Interface):
-Cameras
The screen -
-Bluetooth
MMC -
-USB
-Keyboard
XBUS-to medium with RAP3G
OMAP is a standard ASIC design by Texas Instrument and in use by the Vendor and other NOTEBOOK
VCORE CORE Voltage (1.4V generated by the discrete SMPS and work under 1.09V on sleepmode
I / O voltage VIO (1.8V) by RETU


APE COMBO MEMORY

APE flash used to store application code and user data
Lets not to access the code directly from Flash ---> loader must walk to and from DDR
256MBit capacity (flash), 256MBit (DDR)
DDR voltage to 1.8V is VDRAM
VIO is 1.8V of DDR I / O
Both NAND core voltage and I / O originating from RETU
Clock is 110Mhz DDR (220MHz / 2)
Flash interface speed is 22MHZ