Datasheet

Philips Semiconductors Product specification
8XC54/58
8XC51FA/FB/FC/80C51FA
8XC51RA+/RB+/RC+/RD+/80C51RA+
80C51 8-bit microcontroller family
8K–64K/256–1K OTP/ROM/ROMless, low voltage (2.7V–5.5V),
low power, high speed (33MHz)
2000 Aug 07
26
(8XC51FX and 8XC51RX+ ONLY)
CF CR CCF4 CCF3 CCF2 CCF1 CCF0––
CCON
(D8H)
CH CL
OVERFLOW
INTERRUPT
16–BIT UP COUNTER
IDLE
TO PCA
MODULES
CMOD
(D9H)
CIDL WDTE –– –– –– CPS1 CPS0 ECF
OSC/12
OSC/4
TIMER 0
OVERFLOW
EXTERNAL INPUT
(P1.2/ECI)
DECODE
00
01
10
11
SU00033
Figure 15. PCA Timer/Counter
MODULE 0
MODULE 1
MODULE 2
MODULE 3
MODULE 4
PCA TIMER/COUNTER
CF CR CCF4 CCF3 CCF2 CCF1 CCF0––
CMOD.0 ECF
CCAPMn.0 ECCFn
TO
INTERRUPT
PRIORITY
DECODER
CCON
(D8H)
IE.6
EC
IE.7
EA
SU00034
Figure 16. PCA Interrupt System