Nokia 9110 Service Manual
PAMS
Technical Documentation
RAE–2
BS1
Page 5 – 5
Section 02/99
A/D converter readings of the battery voltage and temperature via a par-
allel interface to the CPU. Many PWRU items can be controlled by regis-
ter writing or directly via pin. The system voltage is always present until
battery voltage drops below 3.0V.
allel interface to the CPU. Many PWRU items can be controlled by regis-
ter writing or directly via pin. The system voltage is always present until
battery voltage drops below 3.0V.
Electronics
The following sections of circuitry are included on the BS1:
Function
PWRU Power supply unit
PDA CPU
IR transceiver
DRAM memory
Flash memory
HF Amplifier
QWERTY Keyboard pads