– 5-5 –
■
MCU (C166S)
The C166S controller core combines advantages of both RISC and CISC processors in advanced architecture which closely
couples on-chip memory and controller peripherals to the core in a very efficient way. This micro controller works in 32 bits or
16 bits instructions and on 32,16 or 8 bit data. The C166S architecture is based on RISC.
The core uses multiple variable register banks, and single cycle context switch support. The memory space is organised
logically as a van Neumann architecture, but physically the core uses multiple high bandwidth buses and core memory to
increase performance.
■
Memory interface
The U2001 E-Gold + V3 has a physical address space of 128-Mbit / 16-Mbyte. The actual amount of memory needed depends
on the features included in the product. The number of features also has an influence on the required memory access speed.
The memory data bus is 16 bit wide. The SRAM utilizes the BHEQ signal to support both 8 and 16 bits access for more
efficient use. The memory interface of the U2001 E-Gold + V3 supports 1.8 V or 2.6 V operation, allowing flexibility on the
choice of memory components. EB-X400 adopted 2.6 V operation because the operation voltage of memory is 3.0 V operation.
The memory interface voltage level is selected by connecting the VDD2.0x supplies on E-Gold + to either V_SD or to VINT.
Maximum
Access Time [ns]
MCU
speed
Number of
write state
Eff. Bus
speed [MHz]
GSM stack, basic features
100
13MHz
0 ws
6.5
GSM stack, advanced features
70
26MHz
1 ws
8.67
GPRS stack
70
26MHz
1 ws
8.67
Memory Mapping:
Normal Case
Alternative Case
0x00000
0x60000
0x80000
0x400000
0x800000
0xC00000
0xFFFFFF
0x00000
0x60000
0x80000
0x400000
0x800000
0xC00000
0xFFFFFF
Figure 5.3. Memory Map
nCS2 Flash2
nCS0 Flash1
nCS1 pSRAM
nCS2 Flash2
nCS2 Flash2
Initialize nCS2 and Not Use
or
Not Initialize _> nCS0
nCS1 pSRAM
nCS3 Companion IC
nCS3 Companion IC
nCS4 Polytone IC
nCS4 Polytone IC
SYSTEM Int. RAM
SYSTEM Int. RAM
Содержание EB-X400
Страница 86: ...12 1 12 LAYOUT DIAGRAMS 12 1 Main Board U2001 ...
Страница 87: ...12 2 ...
Страница 88: ...12 2 Upper Face PCB 12 3 Green Black Black White ...
Страница 89: ...12 3 Hinge PCB 12 4 ...
Страница 90: ...12 4 SIM PCB 12 5 ...