ZOLL Base Powercharger 4x4, Руководство по обслуживанию

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FUNCTIONAL DESCRIPTION
IV-6
The microprocessor (U104) is a 87C752 running at 6.144 MHz with 16K of internal
ROM and 64 bytes of internal RAM. It also includes a five bit I/O port (port #0; pins 6 -
8, 23 and 24) and two 8 bit I/O ports (port #1 and #3; pins 13 - 22 and 1- 5, 25 - 27).
The lower five bits of port 1 are configured as analog inputs (pins 13 - 19).
The operating frequency is derived from the external crystal circuit (Y101, C103,
C102, R114) connected to the processor (at U104.10 and U104.11). R124 and C123
provide the reference voltage for the internal A/D.
C112, C101, C129, C130 are bypass capacitors associated with various IC's located
within each compartment circuitry.
For a summary of the microprocessor I/O pin assignments and Battery Test, Charging
Voltage and Current Settings see the following tables below.
Port
& Pin
In /
Out
Analog
/Digital
Signal
Name Description
P0.0 -- D -- - Not Used -
P0.1 -- D -- - Not Used -
P0.2 -- D -- - Not Used -
P0.3 O D WDO Watchdog output.
P0.4 O D CAPOUT PWM Capacity Level Indicator
P1.0 I A V_BATT Battery Voltage
P1.1 I A V_TST VCC Test.
P1.2 I A TEMP Temperature
P1.3 I A I_SENSE Current Sense
P1.4 I A FREQ Clock Test
P1.5 -- D -- - Not Used -
P1.6 I D TEST- Enable support diagnostics (not
available in all versions of code
release).
P1.7 I D Battery Detection.
P3.0 O D C Charge LED
P3.1 O D Ready LED
P3.2 O D Test LED
P3.3 O D F Fault LED.
P3.4 O D Charge Shutdown
P3.5 O D CHRG_ENB- Charge control circuit enable.
P3.6 O D SSEL0- Charge state select bit 0.
P3.7 O D SSEL1- Charge state select bit 1.
Summary of the Battery Test and Charging Voltage and Current Settings;
SSEL0- SSEL1- Control State I Limit V Set
1 1 Discharge - - Battery voltage
0 1 Discharge - - Battery voltage
1 0 CC Charge 0.500 Amps 16.5 Volts
0 0 CV Charge 1.0 Amps ~ 11.75 Volts
(actual value changes with
temperature)