AT89C51RC2-3CSCM View Datasheet(PDF) - Atmel Corporation

Part Name

Description

MFG CO.

AT89C51RC2-3CSCM

8-bit Microcontroller with 16K/32K Bytes Flash

Atmel Corporation 

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AT89C51RB2/RC2

Table 16. CKCON1 Register

CKCON1 - Clock Control Register (AFh)

7

6

5

4

3

2

1

0

-

-

-

-

-

-

-

SPIX2

Bit

Number

7

6

5

4

3

2

1

0

Bit

Mnemonic Description

-

Reserved

-

Reserved

-

Reserved

-

Reserved

-

Reserved

-

Reserved

-

Reserved

SPIX2

SPI (This control bit is validated when the CPU clock X2 is set; when X2 is low,

this bit has no effect).

Clear to select 6 clock periods per peripheral clock cycle.

Set to select 12 clock periods per peripheral clock cycle.

Reset Value = XXXX XXX0b

Not bit addressable

19

4180E–8051–10/06

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