88
User’s Manual U15104EJ2V0UD
CHAPTER 5 CLOCK GENERATOR
5.1 Functions of Clock Generator
The clock generator generates the clock to be supplied to the CPU and peripheral hardware. This system clock
oscillator is connected to 4.5 MHz crystal resonator. At this time, set bit 0 (DTSCK0) of the DTS system clock select
register (DTSCK) to 1. Set the DTSCK0 flag after power application and reset by the RESET pin, and before using
the basic timer, buzzer output control circuit, PLL frequency synthesizer, and frequency counter.
Oscillation can be stopped by executing the STOP instruction.
Figure 5-1. Format of DTS System Clock Select Register (DTSCK)
DTSCK0
Selects system clock
1
4.5 MHz
0
Setting prohibited
7
0
6
0
5
0
4
0
3
0
2
0
1
0
<0>
DTSCK0
Symbol
DTSCK
Address
FFAAH
After reset
00H
R/W
R/W
Содержание mPD178053
Страница 2: ...2 User s Manual U15104EJ2V0UD MEMO ...