Rainbow-electronics ATAR862-8 User Manual download pdf (Page 77)

ATAR862-8

4589B–4BMCU–02/03

Combination Modes The UTCM consists of two timers (Timer 2 and Timer 3) and a serial interface. There is

a multitude of modes in which the timers and serial interface can work together.

The 8-bit wide serial interface operates as shift register for modulation and demodula-

tion. The modulator and demodulator units work together with the timers and shift the

data bits into or out of the shift register.

Combination Mode

Timer 2 and SSI

Figure 75. Combination Timer 2 and SSI

4-bit counter 2/1

RES OVF1

Compare 2/1

T2CO1

POUT

CL2/2

DCG

T2M1P4CR

8-bit counter 2/2

RES OVF2

Compare 2/2

T2CO2T2CM

Timer 2 - control

TOG2

INT4

Biphase-,

Manchester-

modulator

Output

MOUT

T2O

Timer 2

modulator

output-stage

T2M2

SO Control

T2C

CL2/1

T2I

SYSCL

T1OUT

TOG3

SCL

I/O-bus

8-bit shift register

MSB LSB

Shift_CL

SIC1 SIC2 SISC

SCLI

Control

STB SRB

Output

INT3

I/O-bus

SSI-control

TOG2

POUT

T1OUT

SYSCL

MCL_SC

MCL_SD

Transmit

buffer

Receive

buffer

CM1

I/O-bus

POUT

SCL

DCGO

TOG2

1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 105 106

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Rainbow-electronics ATAR862-8 User Manual Page 77

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