Datasheet

36
4235K–8051–05/08
AT89C51RD2/ED2
• The ECF bit which when set causes an interrupt and the PCA overflow flag CF (in the CCON
SFR) to be set when the PCA timer overflows.
Figure 13-1. PCA Timer/Counter
CIDL CPS1 CPS0 ECF
IT
CH CL
16 Bit Up Counter
To PCA
Modules
F
CLK PERIPH
/6
F
CLK PERIPH
/2
T0 OVF
P1.2
Idle
CMOD
0xD9
WDTE
CF CR
CCON
0xD8
CCF4 CCF3 CCF2 CCF1 CCF0
Overflow