AT89C51CC02CA-RATUM datasheet(66/156 Pages) ATMEL

66 / 156 page

AT/T89C51CC02

4126J–CAN–05/06

Registers

Table 44. T2CON Register

T2CON (S:C8h)

Timer 2 Control Register

Reset Value = 0000 0000b

bit addressable

TF2

EXF2

RCLK

TCLK

EXEN2

TR2

C/T2#

CP/RL2#

Bit

Number

Bit

Mnemonic

Description

7TF2

Timer 2 Overflow Flag

TF2 is not set if RCLK=1 or TCLK = 1.

Must be cleared by software.

Set by hardware on Timer 2 overflow.

6EXF2

Timer 2 External Flag

Set when a capture or a reload is caused by a negative transition on T2EX pin if

EXEN2=1.

Set to cause the CPU to vector to Timer 2 interrupt routine when Timer 2

interrupt is enabled.

Must be cleared by software.

5RCLK

Receive Clock bit

Clear to use timer 1 overflow as receive clock for serial port in mode 1 or 3.

Set to use Timer 2 overflow as receive clock for serial port in mode 1 or 3.

4TCLK

Transmit Clock bit

Clear to use timer 1 overflow as transmit clock for serial port in mode 1 or 3.

Set to use Timer 2 overflow as transmit clock for serial port in mode 1 or 3.

EXEN2

Timer 2 External Enable bit

Clear to ignore events on T2EX pin for Timer 2 operation.

Set to cause a capture or reload when a negative transition on T2EX pin is

detected, if Timer 2 is not used to clock the serial port.

2TR2

Timer 2 Run Control bit

Clear to turn off Timer 2.

Set to turn on Timer 2.

1C/T2#

Timer/Counter 2 Select bit

Clear for timer operation (input from internal clock system: fOSC).

Set for counter operation (input from T2 input pin).

0CP/RL2#

Timer 2 Capture/Reload bit

If RCLK=1 or TCLK=1, CP/RL2# is ignored and timer is forced to auto-reload on

Timer 2 overflow.

Clear to auto-reload on Timer 2 overflows or negative transitions on T2EX pin if

EXEN2=1.

Set to capture on negative transitions on T2EX pin if EXEN2=1.

AT89C51CC02CA-RATUM 数据表(PDF) 66 Page - ATMEL Corporation

AT89C51CC02CA-RATUM 数据表(HTML) 66 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

数据表下载