p87c51rb2fa NXP Semiconductors, p87c51rb2fa Datasheet - Page 34

• Manufacturer Part Number: p87c51rb2fa
• Description: 80c51 8-bit Microcontroller Family
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2003 Jan 24
OSC/12 (12 CLOCK MODE)
80C51 8-bit microcontroller family
with 512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high
speed (30/33 MHz)
OSC/4 (12 CLOCK MODE)
OSC/6 (6 CLOCK MODE)
OSC/2 (6 CLOCK MODE)
EXTERNAL INPUT
IDLE
TIMER 0 OVERFLOW
(P1.2/ECI)
PCA TIMER/COUNTER
MODULE 0
MODULE 1
MODULE 2
MODULE 3
MODULE 4
OR
OR
CMOD.0
ECF
8KB/16KB/32KB/64KB OTP
CIDL
CF
00
01
10
11
Figure 21. PCA Interrupt System
WDTE
CCAPMn.0
Figure 20. PCA Timer/Counter
CF
CR
DECODE
CR
––
––
ECCFn
34
CCF4
––
––
CCF4
CCF3
––
16–BIT UP COUNTER
CH
CCF3
P87C51RA2/RB2/RC2/RD2
CCF2
CPS1
CCF2
CCF1
CPS0
IE.6
CL
EC
OVERFLOW
CCF1
CCF0
ECF
IE.7
EA
MODULES
TO PCA
CMOD
CCON
(C1H)
(C0H)
CCF0
TO
INTERRUPT
PRIORITY
DECODER
INTERRUPT
CCON
(C0H)
SU01097
SU01256
Product data