P80C32EBAA datasheet(39/62 Pages) PHILIPS

39 / 62 page

Philips Semiconductors

Product specification

80C52/80C54/80C58

CMOS single-chip 8-bit microcontrollers

1996 Aug 16

Table 2. Timer 2 Operating Modes

RCLK + TCLK

CP/RL2

TR2

MODE

16-bit Auto-reload

16-bit Capture

Baud rate generator

(off)

OSC

÷ 12

C/T2 = 0

C/T2 = 1

TR2

Control

TL2

(8-bits)

TH2

(8-bits)

TF2

RCAP2L

RCAP2H

EXEN2

Control

EXF2

Timer 2

Interrupt

T2EX Pin

Transition

Detector

T2 Pin

Capture

SU00066

Figure 2. Timer 2 in Capture Mode

Not Bit Addressable

Symbol

Function

—

Not implemented, reserved for future use.*

T2OE

Timer 2 Output Enable bit. See details in Programmable Clock-Out.

DCEN

Down Count Enable bit. When set, this allows Timer 2 to be configured as an up/down counter.

—

T2OE

DCEN

SU00746

User software should not write 1s to reserved bits. These bits may be used in future 8051 family products to invoke new features.

In that case, the reset or inactive value of the new bit will be 0, and its active value will be 1. The value read from a reserved bit is

indeterminate.

Bit

T2MOD

Address = 0C9H

Reset Value = XXXX XX00B

Figure 3. Timer 2 Mode (T2MOD) Control Register

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