Chapter 4. Peripheral Hardware
CHAPTER 4. PERIPHERAL HARDWARE
4.1 CLOCK GENERATING CIRCUIT
Clock generating circuit consists of Clock Pulse Generator(C.P.G), Prescaler, Basic
Interval Timer(B.I.T) and Watch Dog Timer.
The clock applied to the Xin pin divided by two is used as the internal system clock.
fex
fcpu
OSC
Circuit
C.P.G
Internal System Clock
PRESCALER
IFBIT
PS1
ENPCK
0
7
0
5
8
WDTCL
B.I.T (8)
WDT(6)
MUX
9
BTCL
IFWDT
COMPARATOR
3
WDTON
Peripheral
CKCTLR
5
6
6
0
To Reset
Circuit
WDTR
6
0
1
2
3
4
5
Internal Data Bus
Fig. 4.1 Block diagram of clock generating circuit
4 - 1
HYNIX [ HYNIX SEMICONDUCTOR ]
