c8051t602 Silicon Laboratories, c8051t602 Datasheet - Page 92

• Manufacturer Part Number: c8051t602
• Description: Mixed Signal Otp Eprom Mcu Family
• Manufacturer: Silicon Laboratories

C8051T600/1/2/3/4/5
Table 12.1. Internal Oscillator Electrical Characteristics
–40 to +85 °C unless otherwise specified.
92
Calibrated Internal Oscillator
Frequency
Internal Oscillator Supply Current
(from V
Bit7:
Bits6–0: OSCICL: Internal Oscillator Calibration Register.
Bits7–5: UNUSED. Read = 000b, Write = don't care.
Bit4:
Bit3:
Bit2:
Bits1–0: IFCN1–0: Internal Oscillator Frequency Control Bits.
R/W
R/W
Bit7
Bit7
-
-
DD
)
UNUSED. Read = 0. Write = don’t care.
This register adjusts the internal oscillator period. The reset value for OSCICL defines the
internal oscillator base frequency. The reset value of this register is factory calibrated to gen-
erate an internal oscillator frequency of 24.5 MHz.
IFRDY: Internal Oscillator Frequency Ready Flag.
0: Internal Oscillator is not running at programmed frequency.
1: Internal Oscillator is running at programmed frequency.
CLKSL: System Clock Source Select Bit.
0: SYSCLK derived from the Internal Oscillator, and scaled as per the IFCN bits.
1: SYSCLK derived from the External Clock circuit.
IOSCEN: Internal Oscillator Enable Bit.
0: Internal Oscillator Disabled.
1: Internal Oscillator Enabled.
00: SYSCLK derived from Internal Oscillator divided by 8.
01: SYSCLK derived from Internal Oscillator divided by 4.
10: SYSCLK derived from Internal Oscillator divided by 2.
11: SYSCLK derived from Internal Oscillator divided by 1.
Parameter
SFR Definition 12.1. OSCICL: Internal Oscillator Calibration
SFR Definition 12.2. OSCICN: Internal Oscillator Control
R/W
R/W
Bit6
Bit6
-
R/W
R/W
Bit5
Bit5
-
IFRDY
OSCICN.2 = 1
R/W
Bit4
Bit4
R
Rev. 0.5
CLKSL
Conditions
R/W
R/W
Bit3
Bit3
IOSCEN
R/W
R/W
Bit2
Bit2
IFCN1
R/W
R/W
Bit1
Bit1
TBD
Min
—
TBD
24.5
Typ
IFCN0
R/W
R/W
Bit0
Bit0
TBD
Max
—
SFR Address:
SFR Address:
00010100
Reset Value
Reset Value
Variable
0xB3
0xB2
Units
MHz
µA