mpc89x515a Megawin Technology, mpc89x515a Datasheet - Page 16

• Manufacturer Part Number: mpc89x515a
• Description: 8-bit Micro-controller
• Manufacturer: Megawin Technology

C/T2: Timer or counter select. 0 is for timer and 1 is for external event counter.
CP/RL2: Capture/Reload flag. When set, captures will occurs on a negative transition at T2EX if
TIMER0 (T0) AND TIMER1 (T1)
Mode 0
The timer register is configured as a 13-bit register. As when 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. Mode 0 operation is the same
for Timer0 and Timer1.
Mode 1
Mode1 is the same as Mode0, except that the timer register is being run with all 16 bits.
Mode 2
Mode 2 configures the timer register as an 8-bit counter (TLx) with automatic reload. Overflow
from TLx does not only set TFx, but also reloads TLx with the content of THx, which is
determined by user’s program. The reload leaves THx unchanged. Mode 2 operation is the
same for Timer0 and Timer1.
16
T0 or T1 pin
(sampled)
T0 or T1 pin
(sampled)
OSC/12
OSC/12
/INTx
GATE
/INTx
GATE
C//T
C//T
EXEN2=1. When cleared, auto-reloads will occur either with Timer2 overflows or a negative
transition at T2EX when EXEN2=1. When whether TCLK or RCLK is 1, this bit is ignored and
the timer is forced to auto-reload on Timer2 overflow.
0
1
0
1
TRx
TRx
MPC89x515A Data Sheet
0
1
0
1
TLx[7:0] THx[7:0]
TLx[4:0] THx[7:0]
TFx
TFx
MEGAWIN
Mode 1
Mode 0
Interrupt
Interrupt