Chapter 8 8-Bit Timer 1 Tm1; 8-Bit Timer 1 Functions - NEC mPD780973 Series Preliminary User's Manual

8.1 8-Bit Timer 1 Functions

The 8-bit timer 1 operates as an 8-bit interval timer.
Figure 8-1 shows timer 1 block diagram.
Timer clock select register 1 (TCL1)

CHAPTER 8 8-BIT TIMER 1 TM1

Figure 8-1. Timer 1 (TM1) Block Diagram
8-bit compare register 1 (CR1)
3
f /2
X
4
f /2
X
5
f /2
X
7
f /2
X
9
f /2
X
11
f /2
X
3
TCL12 TCL11 TCL10
Internal bus
Coincidence
8-bit counter (TM1)
Clear
TCE1
Timer mode control register (TMC1)
Internal bus
INTTM1
111