Z51F3220FNX Datasheet, PDF (104/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
OSCCR (Oscillator Control Register) : C8H
7
6
5
4
–
–
IRCS2
IRCS1
–
–
R/W
R/W
3
IRCS0
R/W
2
IRCE
R/W
1
XCLKE
R/W
0
SCLKE
R/W
Initial value : 08H
IRCS[2:0]
IRCE
XCLKE
SCLKE
Internal RC Oscillator Post-divider Selection
IRCS2 IRCS1 IRCS0 Description
0
0
0
INT-RC/32 (0.5MHz)
0
0
1
INT-RC/16 (1MHz)
0
1
0
INT-RC/8 (2MHz)
0
1
1
INT-RC/4 (4MHz)
1
0
0
INT-RC/2 (8MHz)
1
0
1
INT-RC/1 (16MHz)
Other values
Not used
Control the Operation of the Internal RC Oscillator
0
Enable operation of INT-RC OSC
1
Disable operation of INT-RC OSC
Control the Operation of the External Main Oscillator
0
Disable operation of X-TAL
1
Enable operation of X-TAL
Control the Operation of the External Sub Oscillator
0
Disable operation of SX-TAL
1
Enable operation of SX-TAL
PS029902-0212
PRELIMINARY
101