qf4a512 ETC-unknow, qf4a512 Datasheet - Page 15

• Manufacturer Part Number: qf4a512
• Description: 4-channel Programmable Signal Converter Psc
• Manufacturer: ETC-unknow

PRELIMINARY
QF4A512
The sequence of events that occurs after a hardware reset is detailed in the preceding diagram. The hardware reset will be applied at
power-up or when the external /RST pin is toggled low. If the DRDY pin is held high (for example to write directly to EEPROM) the
startup sequence is bypassed.
5.2 Extended Initialization
There is an option to perform an Extended Initialization regardless of the setting for auto_config. The Extended Initialization comprises
a series of programmable block transfers from the EEPROM to the on-chip registers. To invoke Extended Initialization the alt_startup1
bit must be set in the STARTUP_1 register (07h). This will cause the chip to read the xtnd_init bit in the STARTUP_2 Register (Bit 2,
register 08h) to determine if an Extended Initialization will occur. If xtnd_init is set the chip will then read the starting address for the
sequence(s) in EEPROM, initseq_addr, from registers IGC_SEQADDR (EBh, ECh).
Figure 4. Extended Initialization
Rev C5, Jan 07
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