AT89C51IC2-RLTIM ATMEL [ATMEL Corporation], AT89C51IC2-RLTIM Datasheet - Page 15
AT89C51IC2-RLTIM
Manufacturer Part Number
AT89C51IC2-RLTIM
Description
8-bit Flash Microcontroller with 2-wire Interface
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT89C51IC2-RLTIM.pdf
(147 pages)
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4301C–8051–06/06
Table 15. OSCCON Register
OSCCON- Oscillator Control Register (86h)
Reset Value = XXXX X0’HSB.OSC’’HSB.OSC’b (see Hardware Security Byte (HSB)
Table 84)
Not bit addressable
Table 16. CKRL Register
CKRL - Clock Reload Register
Reset Value = 1111 1111b
Not bit addressable
Number
Number
Bit
Bit
7:0
7
7
-
-
7
6
5
4
3
2
1
0
Mnemonic Description
Mnemonic Description
SCLKT0
OscBEn
OscAEn
CKRL
Bit
6
6
-
-
-
-
-
-
-
Reserved
Reserved
Reserved
Reserved
Reserved
Sub Clock Timer0
Cleared by software to select T0 pin
Set by software to select T0 Sub Clock
Cleared by hardware after a Power Up
OscB enable bit
Set by software to run OscB
Cleared by software to stop OscB
Programmed by hardware after a Power-up regarding HSB.OSC (Default
cleared, OSCB stopped)
OscA enable bit
Set by software to run OscA
Cleared by software to stop OscA
Programmed by hardware after a Power-up regarding HSB.OSC(Default Set,
OSCA runs)
Clock Reload Register:
Prescaler value
5
5
-
-
4
4
-
-
3
3
-
-
SCLKT0
2
2
-
AT89C51IC2
OscBEn
1
1
-
OscAEn
0
0
-
15
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