C8051F327-GM Silicon Laboratories Inc, C8051F327-GM Datasheet - Page 74

• Manufacturer Part Number: C8051F327-GM
• Description: IC 8051 MCU FLASH 16K 28QFN
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F32xr

Specifications of C8051F327-GM

• Program Memory Type: FLASH
• Program Memory Size: 16KB (16K x 8)
• Package / Case: 28-QFN
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: UART/USART, USB
• Peripherals: POR
• Number Of I /o: 15
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: C8051F3x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 1.5 KB
• Interface Type: UART/USB
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 2
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: C8051F326DK
• Minimum Operating Temperature: - 40 C
• Package: 28QFN EP
• Device Core: 8051
• Family Name: C8051F327
• Maximum Speed: 25 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 336-1481 - DAUGHTER CARD TOOLSTCK C8051F327770-1006 - ISP 4PORT FOR SILABS C8051F MCU
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1297-5

C8051F326/7
10.2. Internal Low-Frequency (L-F) Oscillator
C8051F326/7 devices include a low-frequency oscillator. The OSCLCN register (see SFR Definition 10.3)
is used to enabled the oscillator.
10.3. CMOS External Clock Input
A CMOS clock can be used as an external clock input. The CMOS clock should be wired to the XTAL2 pin
(P0.3) as shown in Figure 10.1 on Page 71. Port pins must be configured when using the external oscilla-
tor circuit. The Port I/O Crossbar should be configured to allow digital inputs be setting INPUTEN (GPI-
OCN.6). Also, P0.3 should be configured to open drain mode. See Section “11. Port Input/Output” on
page 79 for more information.
74
Bit7:
Bit6–0:
OSCLEN
R/W
Bit7
OSCLEN: Internal L-F Oscillator Enable.
0: Internal L-F Oscillator Disabled.
1: Internal L-F Oscillator Enabled.
Unused. Read = 0000000b. Write = don’t care.
SFR Definition 10.3. OSCLCN: Internal L-F Oscillator Control
Bit6
—
R
Bit5
—
R
Bit4
—
R
Rev. 1.1
Bit3
—
R
Bit2
—
R
Bit1
—
R
Bit0
—
R
SFR Address:
Reset Value
0xxxxxxx
0xE3