- SS-HQ1 Application Notes -
Ver.1.0.0 January 7, 2005
18
3.5.2. Communication Control with an External EVR
External EVR Connection
As for external EVRs, the CXD3172AR can be connected to the Fujitsu MB88347L.
External EVRs enable control of eight channels through the following parameters. Note that each parameter
controls specific pins, so be sure to refer to the following settings if an external EVR is used.
Table 3.5-4 External EVR Configuration
MB88347L
output
Pin
Name
Pin
Parameter
Control details
Data
transmission
timing
AO1 15 EVRUSR0 CAT18_Byte8_bit0-7
AO2 2 EVRUSR1 CAT18_Byte9_bit0-7
AO3 3 EVRUSR2 CAT18_Byte10_bit0-7
AO4 4 EVRUSR3 CAT18_Byte11_bit0-7
Output from
each field
AO5 5 EVRUSR4 CAT18_Byte12_bit0-7
AO6 6 EVRUSR5 CAT18_Byte13_bit0-7
AO7 7 EVRUSR6 CAT18_Byte14_bit0-7
AO8 10 EVRUSR7 CAT18_Byte15_bit0-7
User-adjustable
value, 0h-FFh
Output from
groups of four
fields
External EVR Communication Control
Each field is used in communication between the CXD3172AR and an external EVR (MB88347L).
Send setting values in parameters EVREUSR0-7 as shown in Table 3.5-4 External EVR Configuration to have
them applied to the MB88347L output voltage.
The timing of transmissions from the CXD3172AR to the MB88347L varies depending on the EVR pin.
Communication to AO1-AO4 is on a per-field basis, but to AO5-AO8, transmissions rotate among individual
fields or are sent to groups of four fields.