Rainbow-electronics T89C51CC01 Manual do Utilizador descarregar pdf (Página 20)

T89C51CC01

Rev. D – 17-Dec-01

Notes: 1. This control bit is validated when the CPU clock bit X2 is set; when X2 is low, this bit

has no effect.

Reset Value = 0000 0000b

1T0X2

Timer0 clock (1)

Clear to select 6 clock periods per peripheral clock cycle.

Set to select 12 clock periods per peripheral clock cycle.

0X2

CPU clock

Clear to select 12 clock periods per machine cycle (STD mode) for CPU and all

the peripherals.

Set to select 6 clock periods per machine cycle (X2 mode) and to enable the

individual peripherals "X2"bits.

Bit

Number

Bit

Mnemonic Description

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 148 149

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