- SS-HQ1 Application Notes -
Ver.1.0.0 January 7, 2005
238
Serial Communication Prohibited Period (EEPROM Write)
Fig 12.4-8 Communication Prohibited Period of EEPROM Write Commands
When EEPROM write command is received, the next command cannot be received more than 18 fields until
the EEPROM write is complete.
Table 12.4-5 Communication Prohibited Period of EEPROM Write
Command
prohibit_period_4
Specify and Write EEPROM direct address
Specify and Write EEPROM category
18 field
Write all EEPROM categories
360 field
When not using communication with the External Microcomputer
If RS-232C communication is used, set SIFSEL to high and follow the RS-232C communication settings.
Also set XCS and SCK to high if there is no communication with an external microcomputer (or via serial
interface and when SIFSEL=low). Keep SI fixed at low or high. Additionally, leave output pin SO open.
VD
XCS
prohibit period 4
EEPROM
write
sending
Next
command
sending
DSP-EEPROM access time