- SS-HQ1 Application Notes -
Ver.1.0.0 January 7, 2005
36
RESET or
Power ON
MCRCON
initialization
System
initialization
Reading of all
EEPROM data
Reading of internal
ROM values
Firmware
initialization
Main routine
ECK in & XRST=L
XRST -> H
Checking for EEPROM
Determination of type
(Asahi Kasei or ROHM)
Checking data availability
EEPROM
detection
Y
N
see separate document
5. Power-on Sequence
5.1. Power-on Sequence
In the SS-HQ1 system, only initial operations for the DSP (CXD3172AR) are required after startup.
Initial operations for the DSP assume that power has been supplied to the CCD and peripheral ICs. Connect
reset input XRST (pin 11) to the reset circuit.
We recommend that setting parameters of the SS-HQ1 system be stored in EEPROM. The initialization
sequence varies depending on whether or not there are valid parameters in EEPROM.
Please keep these things in mind when designing a system reset for the entire camera set (as when an
external microcomputer is used).
5.1.1. DSP (CXD3172AR) Initialization Sequence
Fig 5.1-1 General DSP (CXD3172AR) Initialization Sequence for SS-HQ1