NEC NC1600C Service Manual page 214

4. List of Major Bus Functions
IC7000 : BD4730G Power supervision and reset control
IC7002 : S3C2440A-400 CPU
IC7005 : PQ070XZ01ZPH CPU 3.3V power regulator for I/O
IC7004 : PQ015YZ01ZPH CPU 1.2V power regulator for core
X7001 : 12M-SG8002JFPCC 12MHz oscillator
IC7003 : HN58X2432T1 EEPROM Usage time, serial No., lens memory data storage
D7001 : LED Reset status display to the CPU
D7002 : LED Reset output status display to the CPU
IC7006 : K4S561632E SDRAM CPU work area
IC7007 : Flash ROM0 CPU's BIOS, data storage area
IC7008 : Flash ROM1 CPU's program area
IC7010 : RTC-8564JE RTC
IC7100 : 74LVC08APW Decoder for bus and buffer control signals
IC7101, IC7102 : 74LCX16245MTDX Data•bus•buffer
IC7103, IC7104 : 74LCX16245MTDX Address•bus•buffer
IC7200 : S1L53354 (ASSIST III) CPU aux. Function IC
X7200 : 33M-SG8002JFSCC 33MHz oscillator For CPI bus clock
IC7201 : NC7WB66K8X Analog switch Main power switching for I
IC7202 : NC7WB66K8X Analog switch Main power switching for I
IC7301 : R5C485-LCFP144 PCMCIA/Card bus
D7300 : LED Display of PC card access status
IC7300 : PQ070XZ01ZPH 2.5V power regulator for PC card interface IC (IC7301)
IC7303 : PQ070XZ01ZPH 3.3V power regulator for PC card connector (M7300)
Q7303 : SI4963GY PC card power selector (3.3V/5.0V) changeover circuit
IC7400 : RTL8100CL-LF Local LAN of Ethernet interface IC
IC7401 : Serial EEPROM Setup data storage for Ethernet interface IC
IC7402 : Power switch for USB DC 5V
IC7500 : RTL8100CL-LF Global LAN of Ethernet interface IC
IC7401 : Serial EEPROM Setup data storage for Ethernet interface IC
IC7602 : 74LVC245APW DIV PWB interface for NC800C Error detection input buffer
IC7604 : PQ070XH02ZP Regulator for Standby +3.3V power supply
IC7605 : PQ070XZ01ZPH Regulator for Main +3.3V power supply
D7602 : LED For Main +5.0V power check. Usually lit during operation
D7603 : LED For Standby +5.0V power check. Usually lit during operation
S7700 : RS-232C changeover switch Selection of the connecting destination for M7700 (RS-232C)
by means of the NEC CPU/TI circuit.
IC7700 : ADM3202ARNZ
IC7702 : ADM3202ARNZ
IC7703 : ADM3202ARNZ
"Confidential, Do Not Duplicate without written authorization from NEC."
CIRCUIT DESCRIPTION
Main clock for CPU•ASSIST III
Interface IC
RS-232C interface IC
RS-232C interface IC
RS-232C interface IC
8-9
2 C BUS1 (5V system) of ASSIST
2
C BUS2 (3.3V system) of ASSIST
For internal NEC ⇔ TI communication
For external ⇔ NEC/TI communication
For CPU ⇔ Lamp source communication