mpc82g516a Megawin Technology, mpc82g516a Datasheet - Page 43

• Manufacturer Part Number: mpc82g516a
• Description: 8-bit Microcontroller
• Manufacturer: Megawin Technology

11.1.4 Mode 3: Two 8-Bit Timer/Counters
Timer 1 in Mode 3 simply holds its count. The effect is the same as setting TR1=0.
Timer 0 in Mode 3 establishes TL0 and TH0 as two separate counters. The logic for Mode 3 on Timer 0 is shown
in Figure 11-4. TL0 uses the Timer 0 control bits: C/-T, GATE, TR0, /INT0, and TF0. TH0 is locked into a timer
function (counting machine cycles) and takes over the use of TR1 and TF1 from Timer 1. Thus TH0 now controls
the Timer 1 interrupt.
Mode 3 is provided for applications requiring an extra 8-bit timer or counter. When Timer 0 is in Mode 3, Timer 1
can be turned on and off by switching it out of and into its own Mode 3, or can still be used by the serial port as a
baud rate generator, or in any application not requiring an interrupt.
Figure 11-4. Timer 0 in Mode 3: Two 8-Bit Timer/Counters
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* Fosc is the system clock.
/INT0 pin
Fosc
Fosc
GATE
T0 Pin
TR0
12
12
"0"
"1"
"0"
"1"
T0X12
T0X12
"0"
"1"
C/-T
MPC82G516A Data Sheet
TR1
(8 Bits)
(8 Bits)
TL0
TH0
Overflow
Overflow
TF0
TF1
Timer 0
Interrupt
Timer 1
Interrupt
MEGAWIN