mpc82g516a Megawin Technology, mpc82g516a Datasheet - Page 41
mpc82g516a
Manufacturer Part Number
mpc82g516a
Description
8-bit Microcontroller
Manufacturer
Megawin Technology
Datasheet
1.MPC82G516A.pdf
(144 pages)
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TCON (Address=88H, Timer/Counter Control Register, Reset Value=0000,0000B)
TF1: Timer 1 overflow Flag. Set by hardware on Timer/Counter overflow. Cleared by hardware when processor
vectors to interrupt routine.
TR1: Timer 1 Run control bit. Set/cleared by software to turn Timer/Counter 1 on/off.
TF0: Timer 0 overflow Flag. Set by hardware on Timer/Counter 0 overflow. Cleared by hardware when processor
vectors to interrupt routine.
TR0: Timer 0 Run control bit. Set/cleared by software to turn Timer/Counter 0 on/off.
AUXR2 (Address=A6H, Auxiliary Register2, Reset Value=0000,0000B)
T0X12: Timer 0 clock source select while C/-T=0.
T1X12: Timer 1 clock source select while C/-T=0.
T0CKOE: Set/clear to enable/disable Timer 0 clock-out function from P3.4.
The four operating modes are described in the following text.
11.1.1 Mode 0: 13-Bit Timer/Counter
Timer 0 and Timer 1 in Mode 0 look like an 8-bit Counter with a divide-by-32 prescaler. And, Mode 0 operation is
the same for these two timers. Figure 11-1 shows the Mode 0 operation.
In this mode, the Timer register is configured as a 13-bit register. As the count rolls over from all 1s to all 0s, it
sets the Timer interrupt flag TFx. The counted input is enabled to the Timer when TRx=1 and either GATE=0 or
/INTx=1. (Setting GATE=1 allows the Timer to be controlled by external input /INTx, to facilitate pulse width
measurements). TRx and TFx are control bits in SFR TCON. The GATE bit is in TMOD. There are two different
GATE bits, one for Timer 1 (TMOD.7) and one for Timer 0 (TMOD.3).
The 13-bit register consists of all 8 bits of THx and the lower 5 bits of TLx. The upper 3 bits of TLx are
indeterminate and should be ignored. Setting the run flag (TRx) does not clear these registers. That is to say the
user should initialize THx an TLx before start counting.
Figure 11-1. Timer 1 in Mode 0: 13-Bit Timer/Counter
41
T0X12
TF1
* Fosc is the system clock.
7
7
/INT1 pin
Fosc
GATE
Set to select Fosc as the clock source, and clear to select Fosc/12 as the clock source.
Set to select Fosc as the clock source, and clear to select Fosc/12 as the clock source.
T1X12
TR1
6
6
T1 Pin
TR1
12
URM0X6
"0"
"1"
TF0
T1X12
5
5
"0"
"1"
S2TR
TR0
C/-T
4
4
MPC82G516A Data Sheet
S2SMOD S2TX12 S2CKOE
IE1
3
3
IT1
2
2
(5 Bits)
TL1
IE0
1
1
(8 Bits)
TH1
T0CKOE
IT0
0
0
Overflow
TF1
MEGAWIN
Timer 1
Interrupt
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