Chapter 8 8-Bit Timer/Event Counters 2 Tm2 And 3 Tm3; 8-Bit Timer/Event Counters 2 Tm2 And 3 Tm3 Functions - NEC mPD780852 Series Preliminary User's Manual

CHAPTER 8 8-BIT TIMER/EVENT COUNTERS 2 TM2 AND 3 TM3

8.1 8-Bit Timer/Event Counters 2 TM2 and 3 TM3 Functions

The 8-bit timer/event counters 2 TM2 and 3 TM3 can have the following functions.
• Interval timer
• External event counter
• Square wave output
• PWM output
Figure 8-1 shows 8-bit timer/event counter 2 TM2 block diagram, and Figure 8-2 shows 8-bit timer/event counter
3 TM3 block diagram.
Figure 8-1. 8-Bit Timer/Event Counter 2 TM2 Block Diagram
8-bit compare
register 2 (CR2)
TIO2/P43
3
f /2
X
5
f /2
X
7
f /2
X
8-bit counter 2
8
f /2
X
9
f /2 (TM2)
X
11
f /2
X
3
TCL22 TCL21 TCL20
Timer clock select
register 2 (TCL2)
Note Bit 3 of port mode register 4 (PM4)
Internal bus
Coincidence
OVF
Clear
Selector
TCE2 TMC26 LVS2 LVR2 TMC21 TOE2
Timer mode control
register 2 (TMC2)
Internal bus
Preliminary User's Manual U14581EJ3V0UM00
Selector INTTM2
S
Q
INV
R
P43 output latch PM43
S
Invert
level
R
TIO2/P43
Note
121