T48C893 datasheet(63/82 Pages) ATMEL

63 / 82 page

T48C893

Rev. A4, 22-Jan-02

63 (82)

Combination mode 1: Burst modulation

SSI mode 1:

8-bit NRZ and internal data SO output to the Timer 2 modulator stage

Timer 2 mode 1, 2, 3 or 4: 8-bit compare counter with 4-bit programmable prescaler and DCG

Timer 2 output mode 3:

Duty cycle burst generator

1 20120 12012 0120 12012 0120 12012 0120 1201 201

DCGO

Counter 2

TOG2

T2O

Counter = compare register (=2)

13785

Bit 0

Bit 1

Bit 2

Bit 3

Bit 4

Bit 5

Bit 6

Bit 7

Bit 8

Bit 9

Bit 10

Bit 11

Bit 12

Bit 13

Figure 69. Carrier frequency burst modulation with the SSI internal data output

Combination mode 2: Biphase modulation 1

SSI mode 1:

8-bit shift register internal data output (SO) to the Timer 2 modulator stage

Timer 2 mode 1, 2, 3 or 4: 8-bit compare counter with 4-bit programmable prescaler

Timer 2 output mode 4:

The modulator 2 of Timer 2 modulates the SSI internal data output to Biphase code

TOG2

T2O

101

111

8-bit SR-data

Bit 7

Bit 0

13786

Data: 00110101

Figure 70. Biphase modulation 1

Combination mode 3: Manchester modulation 1

SSI mode 1:

8-bit shift register internal data output (SO) to the Timer 2 modulator stage

Timer 2 mode 1, 2, 3 or 4: 8-bit compare counter with 4-bit programmable prescaler

Timer 2 output mode 5:

The modulator 2 of Timer 2 modulates the SSI internal data output to Manchester code

TOG2

T2O

101

8-bit SR-data

Bit 7

Bit 0

13787

Bit 7

Bit 0

Data: 00110101

Figure 71. Manchester modulation 1

T48C893 数据表(PDF) 63 Page - ATMEL Corporation

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