Procu; Technical Specifications - Nokia 9000i Service Manual

After Sales
Technical Documentation

PROCU

The Processing unit contains integrated Intel E3G CPU (CPU and
peripherals on the same chip), two types of memory circuits (DRAM,
FLASH), a 22–bit address bus (26 bit internally), and a 16–bit data bus.
PROCU functions:
– GEOS, DOS, BIOS, TFFS and GEOS application platform
– user interface functions
– external interfaces (IrDA and RS232)
– power management
– self–test, production testing, and maintenance

Technical specifications

Table 16. External Signals and Connections, Inputs
Signal Name
VSYS System voltage 3.3V
VCC5 5V for FLASH and RBUS
VB Battery voltage
VL1 CMT operating voltage
PWRGOOD Reset signal for CPU
VBACK Backup battery voltage to RTC
RBUSTXD RBUS transmit of CMT
RSRXD Serial data to PDA module
TESTMODEX PDA test SW activation
JTAGTDI JTAG data in
JTAGTCK JTAG clock
JTAGTMS JTAG mode control
KEYS(1:0) Keymatrix sense lines
Table 17. External Signals and Connections, Outputs
Signal Name
LIDOPEN Lid status for CMT module
LCDVCCON LCD Vcc on/off
LCDVEEON LCD Vee on/off
LCDPWM PWM signal for LCD voltage control
Original, 08/96
Signal description
Signal description
RAE/RAK–1N
PDA Hardware
From
PDAPWRU
PDAPWRU
B2B / VB
B2B / VL1
PDAPWRU
PDAPWRU
B2B /
RBUSTXD
SIRU
Test pad /
E113
Test pad /
E100
Test pad /
E101
Test pad /
E102
EMIU
To
B2B / LIDO-
PEN
PDAPWRU
PDAPWRU
PDAPWRU
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