Rainbow-electronics T89C51RD2 Manuel d'utilisateur télécharger pdf (Page 21)

Rev. F - 15 February, 2001 21

T89C51RD2

Table 6. T2MOD Register

T2MOD - Timer 2 Mode Control Register (C9h)

Reset Value = XXXX XX00b

Not bit addressable

7 6 5 4 3 2 1 0

- - - - - - T2OE DCEN

Bit

Number

Bit

Mnemonic

Description

7 -

Reserved

The value read from this bit is indeterminate. Do not set this bit.

6 -

Reserved

The value read from this bit is indeterminate. Do not set this bit.

5 -

Reserved

The value read from this bit is indeterminate. Do not set this bit.

4 -

Reserved

The value read from this bit is indeterminate. Do not set this bit.

3 -

Reserved

The value read from this bit is indeterminate. Do not set this bit.

2 -

Reserved

The value read from this bit is indeterminate. Do not set this bit.

1 T2OE

Timer 2 Output Enable bit

Clear to program P1.0/T2 as clock input or I/O port.

Set to program P1.0/T2 as clock output.

0 DCEN

Down Counter Enable bit

Clear to disable timer 2 as up/down counter.

Set to enable timer 2 as up/down counter.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 85 86

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