C8051F502-IMR Silicon Laboratories Inc, C8051F502-IMR Datasheet - Page 168

• Manufacturer Part Number: C8051F502-IMR
• Description: MCU 8-Bit C8051F50x 8051 CISC 64KB Flash 2.5V/3.3V/5V 32-Pin QFN EP T/R
• Manufacturer: Silicon Laboratories Inc

Specifications of C8051F502-IMR

• Package: 32QFN EP
• Device Core: 8051
• Family Name: C8051F50x
• Maximum Speed: 50 MHz
• Ram Size: 4.25 KB
• Program Memory Size: 64 KB
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 25
• Interface Type: I2C/SPI/UART
• On-chip Adc: 32-chx12-bit
• Operating Temperature: -40 to 125 °C
• Number Of Timers: 4

C8051F50x/F51x
SFR Definition 19.2. OSCICN: Internal Oscillator Control
SFR Address = 0xA1; SFR Page = 0x0F;
168
Name
Reset
7:6 IOSCEN[1:0] Internal Oscillator Enable Bits.
2:0
Bit
Type
5
4
3
Bit
SUSPEND
Reserved
IFCN[2:0]
IFRDY
Name
R/W
7
1
IOSCEN[1:0]
00: Oscillator Disabled.
01: Reserved.
10: Reserved.
11: Oscillator enabled in normal mode and disabled in suspend mode.
Internal Oscillator Suspend Enable Bit.
Setting this bit to logic 1 places the internal oscillator in SUSPEND mode. The inter-
nal oscillator resumes operation when one of the SUSPEND mode awakening
events occurs.
Internal Oscillator Frequency Ready Flag.
0: Internal oscillator is not running at programmed frequency.
1: Internal oscillator is running at programmed frequency.
Read = 0b; Must Write = 0b.
Internal Oscillator Frequency Divider Control Bits.
000: SYSCLK derived from Internal Oscillator divided by 128.
001: SYSCLK derived from Internal Oscillator divided by 64.
010: SYSCLK derived from Internal Oscillator divided by 32.
011: SYSCLK derived from Internal Oscillator divided by 16.
100: SYSCLK derived from Internal Oscillator divided by 8.
101: SYSCLK derived from Internal Oscillator divided by 4.
110: SYSCLK derived from Internal Oscillator divided by 2.
111: SYSCLK derived from Internal Oscillator divided by 1.
R/W
6
1
SUSPEND
R/W
5
0
IFRDY
Rev. 1.2
R
4
1
Function
Reserved
R
3
0
2
0
IFCN[2:0]
R/W
1
0
0
0