User`s guide

LZ87010 Advance User’s Guide 8051-Compatible Timers
1/15/03 7-5
Figure 7-5. Timer Mode 3
LZ87010-104
TL0
TH0
TMOD.CT0
TMOD.GATE0 TCON.TR0
TCON.TF0
TO INTERRUPT
CONTROLLER
f[7:0]
CLK
TCLK0
PCLK
CTIN0
INT0
CTIN1
INT1
NOTE:
When Timer 0 is in Mode 3, it uses Timer 1's interrupt and enable
bits (TCON.TF1 and TCON.TR1). Timer 1 will be disabled if it is placed
in Mode 3 and enabled if placed in any other mode. While Timer 1 will
run when Timer 0 is in Mode 3, it can not generate interrupts.
PCLK
PCLK
OVF
n[7:0]
f(n) = n+1
8
8
8
8
f[7:0]
CLK
OVF
n[7:0]
f(n) = n+1
8
8
TCON.TF1
TO INTERRUPT
CONTROLLER
0
1
TCON.TR1
TMOD.CT1
TCLK1
TO TIMER 1
0
1
TMOD.GATE1
TIMER 0
TIMER 1 CLOCKING
INTERNAL TO
THE LZ87010
EXTERNAL TO
THE LZ87010