Rainbow Electronics ATAR862-3 - Manual (Page 62)

62
ATAR862-3
4556B–4BMCU–02/03
Timer 3 Registers
Timer 3 Mode Register (T3M) Address: "B"hex - Subaddress: "0"hex
Note: 1. In this mode, the SSI can be used only as demodulator (8-bit NRZ rising edge). All
other SSI modes are not allowed.
Bit 3 Bit 2 Bit 1 Bit 0
T3M3 T3M2 T3M1 T3M0 Reset value: 1111b
T3M3 T imer 3 M ode select bit 3
T3M2 T imer 3 M ode select bit 2
T3M1 T imer 3 M ode select bit 1
T3M0 T imer 3 M ode select bit 0
Mode T3M3 T3M2 T3M1 T3M0 Timer 3 Modes
1 1 1 1 1 Timer/counter with a read access
2 1 1 1 0 Timer/counter, external capture and external
trigger restart mode (T3I)
3 1 1 0 1 Timer/counter, internal capture and internal
trigger restart mode (TOG2)
4 1 1 0 0 Timer/counter mode 1 without output (T2O ->
T3O)
5 1 0 1 1 Timer/counter mode 2 without output (T2O ->
T3O)
6 1 0 1 0 Burst modulation with Timer 2 (M2)
7 1 0 0 1 Burst modulation with shift register (SO)
8 1 0 0 0 FSK modulation with shift register (SO)
9 0 1 1 1 Pulse-width modulation with shift register (SO)
and Timer 2 (TOG2), internal trigger restart
(SCO) -> counter reset
10 0 1 1 0 Manchester demodulation/pulse-width
demodulation
(1) (T2O -> T3O)
11 0 1 0 1 Biphase demodulation (T2O -> T3O)
12 0 1 0 0 Timer/counter with external capture mode (T3I)
13 0 0 1 1 Not allowed
14 0 0 1 0 Not allowed
15 0 0 0 1 Not allowed
16 0 0 0 0 Not allowed