AT80C51RA2 データシートの表示（PDF） - Atmel Corporation

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AT80C51RA2

High Performance 8-bit Microcontrollers

Atmel Corporation 

AT/TS8xC51Rx2

It is possible to use timer 2 as a baud rate generator and a clock generator simultaneously. For

this configuration, the baud rates and clock frequencies are not independent since both func-

tions use the values in the RCAP2H and RCAP2L registers.

Figure 6-3. Clock-Out Mode C/T2 = 0

XTAL1

:2

(:1 in X2 mode)

TR2

T2CON reg

TL2

TH2

(8-bit) (8-bit)

OVERFLOW

T2

T2EX

Toggle

QD

EXEN2

T2CON reg

RCAP2L RCAP2H

(8-bit) (8-bit)

T2OE

T2MOD reg

EXF2

T2CON reg

TIMER 2

INTERRUPT

Table 6-2.

T2CON Register

T2CON - Timer 2 Control Register (C8h)

7

6

5

4

3

2

TF2

EXF2

RCLK

TCLK

EXEN2

TR2

1

C/T2#

0

CP/RL2#

21

4188F–8051–01/08

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