C8051F230R Silicon Laboratories Inc, C8051F230R Datasheet - Page 97
C8051F230R
Manufacturer Part Number
C8051F230R
Description
IC 8051 MCU 8K FLASH 48TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F2xxr
Specifications of C8051F230R
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
32
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-TQFP, 48-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Other names
336-1011-2
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F230R
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
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13. Oscillator
The MCU includes an internal oscillator and an external oscillator drive circuit, either of which can generate
the system clock. The MCU boots from the internal oscillator after any reset. This internal oscillator can
be enabled/disabled and its frequency can be set using the Internal Oscillator Control Register (OSCICN)
as shown in SFR Definition 13.1. The internal oscillator's electrical specifications are given in Table 13.1.
Both oscillators are disabled when the RST pin is held low. The MCU can run from the internal oscillator
permanently, or it can switch to the external oscillator if desired using CLKSL bit in the OSCICN Register.
The external oscillator requires an external resonator, crystal, capacitor, or RC network connected to the
XTAL1/XTAL2 pins (see Figure 13.1). The oscillator circuit must be configured for one of these sources in
the OSCXCN register. An external CMOS clock can also provide the system clock by driving the XTAL1
pin. The XTAL1 and XTAL2 pins are NOT 5 V tolerant.
opt. 4
XTAL1
opt. 3
XTAL1
XTAL2
VDD
opt. 2
XTAL1
Figure 13.1. Oscillator Diagram
opt. 1
XTAL1
XTAL2
Rev. 1.6
Circuit
Input
OSCXCN
Internal Clock
OSCICN
Generator
EN
OSC
C8051F2xx
SYSCLK
97
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