at89c51rc2-slsil ATMEL Corporation, at89c51rc2-slsil Datasheet - Page 19
at89c51rc2-slsil
Manufacturer Part Number
at89c51rc2-slsil
Description
8-bit Microcontroller With 16k/ 32k Bytes Flash
Manufacturer
ATMEL Corporation
Datasheet
1.AT89C51RC2-SLSIL.pdf
(127 pages)
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4180E–8051–10/06
Table 16. CKCON1 Register
CKCON1 - Clock Control Register (AFh)
Reset Value = XXXX XXX0b
Not bit addressable
Number
Bit
7
7
6
5
4
3
2
1
0
-
Mnemonic Description
SPIX2
Bit
6
-
-
-
-
-
-
-
-
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
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.
5
-
4
-
3
-
AT89C51RB2/RC2
2
-
1
-
SPIX2
0
19
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