Example Of Eeprom Access - Dalsa 1M28-SA User Manual

66
Command
Read
Write
Write disable
Write enable
Abbreviations
0:
1:
X:

Example of EEPROM Access

Table 32 summarizes the sequence of commands for data transmission to the EEPROM of the
camera. Depending on the access function, some steps may not be necessary. To write to the
EEPROM, steps 1-5 are necessary. To read from the EEPROM, skip step 1, but use steps 2-7.
Special cases are the EEPROM commands write enable/disable. In these cases only the steps 3-5
have to be used. The transmission protocol of the RS232 interface is defined in Appendix B.
Table 32: Access Steps for the EEPROM
Step
1
2
3
4
5
6
7
The following example shows in detail the sequence of commands for the EEPROM command
write enable.
03-32-00525-04
PRELIMINARY
Bit 4
1
0
0
0
Logical state 0
Logical state 1
arbitrary state
Action
Write data byte (D7-D0) in register address 00H, if required for function
Write LSB address byte (A7-A0) in register address 01H, if required for function
Write OP-Code und MSB address byte (xxx,OP1, OP2,A10-A8) in register address 02H
Read status register address 04H, wait for state „not (PROM_BUSY or AUTOLOAD)"
Write in register address 03H
Read status register address 04H, wait for state „not (PROM_BUSY or AUTOLOAD)"
Read databyte (D7-D0) in register address 00H, when data are read out from the EEPROM
Bit 3 Bit 2 Bit 1
0 A10 A9
1 A10 A9
0 0 0
0 1 1
command SEND_PROM
1M28, 1M75, and 1M150 User's Manual
Bit 0
A8
A8
X
X
DALSA