9LWHOFRP0RELOH7HFKQRORJ\6$ 3URSULHWDU\DQG&RQILGHQWLDO
- 18 -
V
V
I
I
T
T
E
E
L
L
C
C
O
O
M
M
M
M
O
O
B
B
I
I
L
L
E
E
T
T
E
E
C
C
H
H
N
N
O
O
L
L
O
O
G
G
Y
Y
S
S
.
.
A
A
.
.
This interface is specifically designed to be a quick, low pin count control protocol for
Qualcomm’s
TX_BBA(U112) can be configured for different operating modes and configured for minimum
power consumption, extending battery life in standby mode.
8) User Interface
MSM(U125) user interface comprises digital connections to the subscriber unit ringer transducer, keypad
and LCD display.
9) Mode Select and JTAG Interfaces
The Mode select inputs to the MSM(U125) determine overall mode of the ASIC. The options under the
control of the Mode select inputs are Native Mode which is the normal subscriber unit operation and ICE
Mode in which the on-chip ARM microprocessor is disabled, allowing off-chip emulation by the ICE unit.
4.3.4 Memory Part (U113)
Components: Combination Memory [Flash Memory (128Mbit) + SRAM (32Mbit)]
1) Flash Memory (128Mbit)
Stores telephone’s main and sub programs.
Memory for source code : 12Mbyte .
Memory for NV parameter value , SMS, Phone Book, Download data, PIMS data, camera data.. etc :
4Mbyte.
- Code Flash memory: 8MB (4Mbit x 16), Random Access Time is 70ns
- Data Flash memory: 8MB (4Mbit x 16), Random Access Time is 70ns
2) SRAM (32Mbit)
Stores changes in other person’s system parameter and Data Task data Buffer and stack of each task.
- SRAM: 4MB (2Mbit x 16), Max. Access Time is 70ns
4.3.5 Power Supply Part
Power is supplied by battery or external source of which range is 3.2~4.2V voltage. It is sent to LDO (Low
dropout regulator), which supply 2.8V for Logic power.
