C8051T627-B-GM Silicon Labs, C8051T627-B-GM Datasheet - Page 127

• Manufacturer Part Number: C8051T627-B-GM
• Description: 8-bit Microcontrollers - MCU UBS, 64K OTP MCU
• Manufacturer: Silicon Labs

Specifications of C8051T627-B-GM

• Rohs: yes
• Core: 8051
• Processor Series: C8051T627
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 48 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 3328 B
• On-chip Adc: Yes
• Operating Supply Voltage: 1.8 V to 5.25 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: QFN-32
• Mounting Style: SMD/SMT
• Program Memory Type: EPROM

21. Oscillators and Clock Selection
C8051T620/1/6/7 & C8051T320/1/2/3 devices include a programmable internal high-frequency oscillator, a
programmable internal low-frequency oscillator, and an external oscillator drive circuit. The internal high-
frequency oscillator can be enabled/disabled and calibrated using the OSCICN and OSCICL registers, as
shown in Figure 21.1. The internal low-frequency oscillator can be enabled/disabled and calibrated using
the OSCLCN register. The system clock can be sourced by the external oscillator circuit or either internal
oscillator. Both internal oscillators offer a selectable post-scaling feature. The USB clock (USBCLK) can be
derived from the internal oscillators or external oscillator.
VDD
RC Mode
XTAL2
Option 1
CMOS Mode
10M
XTAL2
C Mode
XTAL2
XTAL1
XTAL2
C8051T620/1/6/7 & C8051T320/1/2/3
Programmable
Internal Clock
Generator
OSCICL
Figure 21.1. Oscillator Options
Circuit
OSCLF
Low Frequency
Input
Oscillator
OSCXCN
EN
OSC
EN
Rev. 1.2
OSCICN
4
2
OSCLD
CLKMUL
n
n
OSCLCN
Internal HFO / 8
OSCLF OSCLD
Internal HFO
Internal LFO
EXOSC / 2
EXOSC / 3
EXOSC / 4
EXOSC
CLKSEL
SYSCLK
USBCLK
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