43
M-AX10
Perform reading from the EEPROM while RAM is being initialized
after the AC power is turned on (port 25 (Pin25) (RESET): L).
Set the read data to RAM using "initcont" after resetting is completed.
(See "2. Initializing.(P.44)")
RESET
RAM set complete flag of EEPROM readout data
[ f_eeprom_rd_set ] = 0
AC check
(Voltage of ACSUB)
(IC901
Internal Port)
Register initialize
RAM initialize
EEPROM readout
BACKUP
check OK ?
Flag for the power ON
[ f_power ] = 1
Flag for initializing
[ f_i nit ] = 1
RAM clear for memory communication
Timer [ tminit ] = 50 msec set
RETURN
Fig. Flow chart of RESET
N
Y
SPECIFICATIONS
1. Basics
1.1 Reset
Perform the reset when connecting the AC power supply.
1.2 BACKUP Mode
Backup is performed when the AC power is turned off.
SPRYH (port 16) and SPRYG (port 17) are set to "L" 10 ms after
the BACKUP port becomes "L."
All the indicators and lamps go dark.
Execution of the BACKUP processes (port processing and register
processing) begins 30 ms later.
Last memory writing to the EEPROM is performed each time a key
is operated, but not performed in the backup processes.
Port processing
1) I/O ports are specified as output ports.
2) Output ports are set to "L."
Backup targets
INPUT1/2, ATT.THROUGH, ATT. HOLD (The level value is also
backed up when ON), ILL.
(The VOLUME level and mode settings at the mechanical switch
are checked each time the power is turned on.)
As writing to ROM may require 40 ms at maximum, 5 V will be
supplied to the microcomputer for about 100 ms after the AC power
is turned off at the hardware.
The data to be written are composed of the following 3 bytes:
BRD.
DUAL
Bright / dark / off
PRO.
ON/OFF
ON/OFF
1/2
ILL
INPUT
ATT. THR
ATT. HOLD
ATT. LEVEL
At ATT. HOLD
ON only
Communication is made using ports 34 (SDA) and 35 (SCL) as
output ports.
1
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
ILL1
ON/OFF
ILL2
ON/OFF
INPUT
1/2
ATT. THROUGH
ON/OFF
ATT. HOLD
ON/OFF
SEPARATE
ON/OFF
DUAL
ON/OFF
BRIDGE
ON/OFF
2
3
VOLUME position (5 bit)
* At ATT. HOLD ON only
BACKUP code
Following item "1."~"7." (P.43~P.51) describe about the specifications
of IC901 PD5508B9.
IC901 PD5508B9
