M44C090-H Datasheet, PDF (48/63 Pages) ATMEL Corporation – Low-Current Microcontroller for Wireless Communication

M44C090-H
M44C890-H
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
DCGO
Counter 2
1201201201201201201201201201201201201201
Counter = compare register (=2)
TOG2
SO
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
T2O
13785
Figure 54. 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
SC
8-bit SR-data
SO
0
0
1
1
Bit 7
T2O
0
0
1
1
Data: 00110101
0
1
0
1
0
1
Bit 0
0
1
13786
Figure 55. 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
SC
SO
0
Bit 7
0
1
0
0
1
T2O
Bit 7
Data: 00110101
8-bit SR-data
1
0
1
0
1
10
1
0
Bit 0
1
Bit 0 13787
Figure 56. Manchester modulation 1
48 (63)
Rev.A3, 14-Dec-01