Atmel C51 Arkusz Danych Pobierz pdf (Strona 30)

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AT89C51RB2/RC2

4180E–8051–10/06

Table 21. T2MOD Register

T2MOD – Timer 2 Mode Control Register (C9h)

Reset Value = XXXX XX00b

Not bit addressable

76543210

------T2OEDCEN

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.

1T2OE

Timer 2 Output Enable Bitt

Cleared 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

Cleared to disable Timer 2 as up/down counter.

Set to enable Timer 2 as up/down counter.

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 126 127

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