Motorola V8162, Руководство по обслуживанию

Страница: 7 / 93

7 © 2000 Motorola, Inc.
PREFACE
V8160
V8160
Logic Changes
•
The biggest change from ST7760 is a new IC called Casper (U1100). Casper is the 338 CPU,
DSP, and CRIB ASIC in one package. However, it is identical in architecture to ST7760.
Hence, any lines that interface those chips together on ST7760 are all internal to the IC now.
Obviously, any lines that interface with the rest of the board (CIA, GCAP, 3WB, Memory,
and RF) are still external.
•
Aux_Battery is eliminated; this has reduced the complexity of the battery circuitry. There are
only two power sources now: ’BATT+" and ’EXT_B+’.
•
The memory devices are larger. Consequently, the SRAM has an additional line running to it.
The Flash’s Chip Select scheme is slightly different than ST7760 because of a new memor map.
•
Flash: 8Mb & 16 Mb on ST7760 to 16 Mb and 32 Mb on ST7860 - FDI Technology also
contains EEProm -256 kb.
•
SRAM: 1Mb on ST7760 to 2Mb on ST7860
•
An External B+ Disconnect Circuit has been added (it is identical to AMPS V3620). If the
voltage on Ext_B+ rises above 6.75V, a voltage detector disconnects Ext_B+ from the rest of
the board. This is for over voltage protection.
•
A new headset jack is being used to commonize 800 CDMA with ST7762 and ST7867. How-
ever, the detection scheme is slightly different than ST7760 .
•
The display is holographic films (similar to Iridium) and EL backlit displays.
Mechanical Changes
• Since there will be no Aux_Batt support in V8160, there is no need for external Aux. Batt.
contacts on the rear housing. Much of the housing remains the same as V3682(GSM) or
V3620 (analog) phones.
Preface