FX803 Datasheet, PDF (6/17 Pages) Sanyo Semicon Device – DC-DC Converter

Controlling Protocol ......
“Write to Control Register” – A/C 30 , followed by 1 byte of Command Data.
H
Audio Switch
See the Signal Switching diagram (Figure 3) and DBS 800
Document for application examples.
General Purpose Timer
Should be set up before interrupts are enabled, as a
General Reset command will set the timer period to
00 – 0ms (permanent interrupt).
H
Interrupt Enable Instructions
Status Bits 0, 1 and 2 are produced regardless of the state
of these settings.
Band Selection
Bits 2 and 3 set the required frequency range (see Figure
4, FX803 Frequencies).
Summing Switch
To break the FX803 drive to the FX806 PLMR Audio
Processor (see Figure 3, Signal Switching).
Setting
MSB
Bit 7
1
0
6
1
0
5
1
0
4
1
0
32
0
0
0
1
1
0
1
1
Interrupt Designation
1
Decoder Interrupts:
0
No Tone Timer and Rx Tone Measurement.
0
Transmitter Interrupt:
0
G/Purpose Timer Interrupt.
Control Bits
Transmitted First
Audio Switch
Enable
Disable
G/Purpose Timer Interrupt
Enable
Disable
Decoder Interrupts
Enable
Disable
Summing Switch
Enable
Disable
Band Selection
High Band
Mid Band
Extended Band
Do Not use this setting
Set to
“0”
Set to
“0”
Table 2 Control Register
“Read Status Register” – A/C 31_H, followed by 1 byte of Reply Data.
Reading
MSB
Bit 7
0
6
0
5
0
4
0
3
1
0
2
1
1
1
0
1
Status Bits
Received First
Set to
“0”
Set to
“0”
Set to
“0”
Set to
“0”
Logic Input Status
“1”
“0”
G/Purpose Timer Period
Expired
(IRQ generated if enabled)
(Table 2)
NOTONE Timer Period
Expired
(IRQ generated if enabled)
(Table 2)
Rx Tone Measurement
Complete
(Interrupt Generated)
Table 3 Status Register
Interrupt Requests (IRQ)
Interrupts on this device are available to draw the attention
of the µController to a change in the condition of the bit in
the Status Register. However Bits are set in the Status
Register irrespective of the setting of interrupt enable bits
(Table 2) and these changes may be recognized by
‘polling’ the register.
General Purpose Timer Period
Set to a logic “1” when the timer period has expired.
Cleared to a logic “0,”
i By a read of the Status Register or,
ii New G/Purpose Timer information or,
iii General Reset Command
NOTONE Timer Period
Set to a logic “1” when the timer period has expired.
Cleared to a logic “0,”
i By a read of the Status Register or,
ii New NOTONE Timer information or,
iii General Reset Command
Rx Tone Measurement
Set to a logic “1” when the Rx Tone measurement is
complete.
Cleared to a logic “0,”
i By a read of the Status Register or,
ii General Reset Command
6