C8051F581-IMR Silicon Labs, C8051F581-IMR Datasheet - Page 175

• Manufacturer Part Number: C8051F581-IMR
• Description: 8-bit Microcontrollers - MCU 50MIPS 128kB 8kB SPI
• Manufacturer: Silicon Labs

Specifications of C8051F581-IMR

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit

SFR Definition 19.1. CLKSEL: Clock Select
SFR Address = 0x8F; SFR Page = 0x0F;
Name
Reset
Bit
7:2
1:0
Type
Bit
CLKSL[1:0] System Clock Source Select Bits.
Unused
Name
R
7
0
Read = 000000b; Write = Don’t Care
00: SYSCLK derived from the Internal Oscillator and scaled per the IFCN bits in reg-
ister OSCICN.
01: SYSCLK derived from the External Oscillator circuit.
10: SYSCLK derived from the Clock Multiplier.
11: reserved.
R
6
0
R
5
0
Rev. 1.2
R
4
0
Function
R
3
0
C8051F58x/F59x
R
2
0
1
0
CLKSL[1:0]
R/W
0
0
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