PS-SAU-1900E
Mar. 8
th
,1999 (Rev. 0.0)
--- CONFIDENTIAL AND PROPRIETARY ---
18
then battery power is set as the primary power
source, as long as the battery voltage is greater
than
∼
10.2 V
dc
.
•
If battery voltage falls below
∼
10.2 V
dc
, then
battery operation will not be permitted even if ac
power is lost.
Battery Charge Control
The BMM controls the charger operation for the lead
acid battery based upon the following criteria:
•
If battery voltage is below
∼
12 V
dc
, then
charging shall occur.
•
If the internal temperature of the product is
greater than
50(+/-5)
°°°°
C
or less than
-15(+/-5)
°°°°
C
then charging shall not occur, regardless of
battery voltage level.
•
Total charge time from
∼
10 V
dc
to
*100% charge
shall be less than 36 hours. Charge time to
80% full charge shall be less than 24 hours.
* 100% charge means provide enough power to meets standby and talk time.
Table 2.5.1.-1: BMM Functional Characteristics.
2.5.2. Electrical
Characteristics.
Charge Lead Acid Battery with current limited constant voltage.
(13./-0.3Volts nominal at +25C)
Provide temperature compensation with -0.026V/C of slope.
2.6.
CDMA Module (CDM).
The CDM provides the CDMA RF interface between the outside world and the CDMA modulated IF data
signals originating or terminating on the Base Band circuit-a part of CDMA Module- and process the
digital signal to audible signals through Mobile Station Modem(MSM) and codec.
This CDMA Module is treated as a “black box”, with certain inputs and outputs. These inputs and outputs
are generally defined in the following sections.
•
Embedded control of all LAU-specific functions, e.g., SLIC operation, Caller ID generation, LED
control, Analog Fax Module control, etc.
•
A/D conversion of analog signals from the telephone interface to suitable digital data for the CDMA
air interface.
•
D/A conversion of received digital CDMA air interface data to analog signals suited to the telephone
interface.
•
J-STD-008 air interface control.
•
Serial interface between the J-STD-008 air interface standard and the LAU serial data port.
•
Provide LCD function. Even though the LCD is not used on SAU-1900E.
The CDMA Module (CDM) contains the components which make up the product’s microcontroller unit.
The backbone of this circuit is the MSM, with it’s necessary peripheral devices (including RAM, flash,
NV_RAM).
2.6.1. I/O
Definitions.
