C8051T627-B-GM Silicon Labs, C8051T627-B-GM Datasheet - Page 137

• 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

SFR Definition 21.6. OSCXCN: External Oscillator Control
SFR Address = 0xB1
Name XCLKVLD
Reset
Bit
6:4
2:0
Type
7
3
Bit
XOSCMD[2:0] External Oscillator Mode Select.
XCLKVLD
XFCN[2:0]
Unused
Name
R
7
0
External Oscillator Valid Flag.
Provides External Oscillator status and is valid at all times for all modes of opera-
tion except External CMOS Clock Mode and External CMOS Clock Mode with
divide by 2. In these modes, XCLKVLD always returns 0.
0: External Oscillator is unused or not yet stable.
1: External Oscillator is running and stable.
00x: External Oscillator circuit off.
010: External CMOS Clock Mode.
011: External CMOS Clock Mode with divide by 2 stage.
100: RC Oscillator Mode.
101: Capacitor Oscillator Mode.
110: Crystal Oscillator Mode.
111: Crystal Oscillator Mode with divide by 2 stage.
Read = 0; Write = Don’t Care
External Oscillator Frequency Control Bits.
Set according to the desired frequency for RC mode.
Set according to the desired K Factor for C mode.
XFCN
000
001
010
100
101
110
011
111
6
0
C8051T620/1/6/7 & C8051T320/1/2/3
XOSCMD[2:0]
415 kHz f 1.1 MHz
1.1 MHz f 3.1 MHz
3.1 MHz f 8.2 MHz
155 kHz f 415 kHz
8.2 MHz f 25 MHz
58 kHz f 155 kHz
20 kHz f 58 kHz
Crystal Mode
R/W
5
0
f 20 kHz
Rev. 1.2
4
0
100 kHz f 200 kHz
200 kHz f 400 kHz
400 kHz f 800 kHz
800 kHz f 1.6 MHz
1.6 MHz f 3.2 MHz
50 kHz f 100 kHz
25 kHz f 50 kHz
Function
R
3
0
-
f 25 kHz
RC Mode
2
0
XFCN[2:0]
K Factor = 1590
R/W
K Factor = 0.87
K Factor = 180
K Factor = 664
K Factor = 2.6
K Factor = 7.7
K Factor = 22
K Factor = 65
1
0
C Mode
0
0
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