Rainbow Electronics T89C51AC2 - Manual (Page 16)

16
T89C51AC2
Rev. B – 19-Dec-01
Figure 5. Clock CPU Generation Diagram
XTAL1
XTAL2
PD
PCON.1
CPU Core
1
0 ÷
2
PERIPH
CLOCK
Clock
Peripheral Clock Symbol
CPU
CLOCK
CPU Core Clock Symbol
X2
CKCON.0
X2B
Hardware byte
WDX2
CKCON.6
PCAX2
CKCON.5
SIX2
CKCON.4
T2X2
CKCON.3
T1X2
CKCON.2
T0X2
CKCON.1
IDL
PCON.0
1
0
ч
2
1
0
ч
2
1
0
ч
2
1
0
ч
2
1
0
ч
2
1
0
ч
2
X2
CKCON.0
FWd Clock
FPca Clock
FUart Clock
FT2 Clock
FT1 Clock
FT0 Clock
and ADC
On RESET