Z51F3220FNX Datasheet, PDF (103/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F3220
Product Specification
11.1.3 Register Map
Table 11-1 Clock Generator Register Map
Name
Address
Dir
SCCR
8AH
R/W
OSCCR
C8H
R/W
Default
00H
20H
Description
System and Clock Control Register
Oscillator Control Register
11.1.4 Clock Generator Register Description
The clock generator register uses clock control for system operation. The clock generation consists of System
and clock control register and oscillator control register.
11.1.5 Register Description for Clock Generator
SCCR (System and Clock Control Register) : 8AH
7
6
5
4
3
–
–
–
–
–
–
–
–
–
–
2
1
0
–
SCLK1
SCLK0
–
R/W
R/W
Initial value : 00H
SCLK [1:0]
System Clock Selection Bit
SCLK1 SCLK0 Description
0
0
INT RC OSC (fIRC) for system clock
0
1
External Main OSC (fXIN) for system clock
1
0
External Sub OSC (fSUB) for system clock
1
1
Not used
PS029902-0212
PRELIMINARY
100