AT83SND1CXXX-ROTIL datasheet(58/212 Pages) ATMEL

58 / 212 page

4109J–8051–10/06

AT8xC51SND1C

Notes:

1. Reloaded from TH1 at overflow.

2. Reloaded from TH0 at overflow.

Reset Value = 0000 0000b

Table 52. TH0 Register

TH0 (S:8Ch) – Timer 0 High Byte Register

Reset Value = 0000 0000b

Table 53. TL0 Register

TL0 (S:8Ah) – Timer 0 Low Byte Register

Bit

Number

Bit

Mnemonic Description

7GATE1

Timer 1 Gating Control Bit

Clear to enable Timer 1 whenever TR1 bit is set.

Set to enable Timer 1 only while INT1 pin is high and TR1 bit is set.

6C/T1#

Timer 1 Counter/Timer Select Bit

Clear for Timer operation: Timer 1 counts the divided-down system clock.

Set for Counter operation: Timer 1 counts negative transitions on external pin T1.

5M11

Timer 1 Mode Select Bits

M11M01Operating mode

0 0 Mode 0: 8-bit Timer/Counter (TH1) with 5-bit prescaler (TL1).

0 1 Mode 1: 16-bit Timer/Counter.

1 0 Mode 2: 8-bit auto-reload Timer/Counter (TL1).(1)

1 1 Mode 3: Timer 1 halted. Retains count.

4M01

3GATE0

Timer 0 Gating Control Bit

Clear to enable Timer 0 whenever TR0 bit is set.

Set to enable Timer/Counter 0 only while INT0 pin is high and TR0 bit is set.

2C/T0#

Timer 0 Counter/Timer Select Bit

Clear for Timer operation: Timer 0 counts the divided-down system clock.

Set for Counter operation: Timer 0 counts negative transitions on external pin T0.

M10

Timer 0 Mode Select Bit

M10M00Operating mode

0 0Mode 0: 8-bit Timer/Counter (TH0) with 5-bit prescaler (TL0).

0 1Mode 1: 16-bit Timer/Counter.

1 0Mode 2: 8-bit auto-reload Timer/Counter (TL0).

(2)

1 1Mode 3: TL0 is an 8-bit Timer/Counter.

TH0 is an 8-bit Timer using Timer 1’s TR0 and TF0 bits.

M00

7654

3210

--------

Bit

Number

Bit

Mnemonic

Description

7:0

High Byte of Timer 0

7654

3210

--------

AT83SND1CXXX-ROTIL Scheda tecnica(PDF) 58 Page - ATMEL Corporation

AT83SND1CXXX-ROTIL Scheda tecnica(HTML) 58 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Scheda tecnica Scarica

Link URL