42
8Bit Single Chip Microcontroller
DMC73C168
The order of 16-Bit read operations should be :
Timer1 : Decrementer : P5 then P4, or P5 then P6
Capture latch : P7 then P6, or P7 then P4
Timer2 : Decrementer : P9 then P8, or P9 then P10
Capture latch : P11 then P10, or P11 then P8
(P7.6)
T1CTL1
SOURCE
P7
P4
P5
T1CTL0 (P6.6)
Prescaler
Reload
Register
16bit
Reload
Register
Normal
Port
START
BIT
Pin B0
(T1 OUT)
Fosc/4
5 bit
Prescaler
16 bit
Decrementer
Toggle Out
Pin A4
(ECI1)
Timer 1
Interrupt (INT2)
IOCTL0 (P0.3)
/INT3 FOR TIMER1
Capture Latch
Figure 5-5. Timer 1 Schematic Diagram
(P10.6)
T2CTL0
CASCADE
P11
Prescaler
P8
P9
T2CTL0 (P6.6)
(P11.6)
T2CTL1
SOURC
16bit
Reload
Register
Reload
Register
Normal
Port
T2CTL1
START
(P11.7)
Pin B1
(T2 OUT)
Fosc/4
5 bit
Prescaler
16 bit
Decrementer
Toggle Out
Pin A5
(ECI2)
Timer 2
Interrupt (INT6)
IOCTL1 (P1.3)
CASCADE
OUTPUT OF TIMER1
/INT1 FOR TIMER2
Capture Latch
Figure 5-6. Timer 2 Schematic Diagram
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