NEC PD754144 - Manual (Page 137)

CHAPTER 6 PERIPHERAL HARDWARE FUNCTION
137 User’s Manual U10676EJ3V0UM
Figure 6-31. Setting of Timer Counter Mode Register (3/3)
(c) Timer counter (channel 2)
7 6 5 4 3 2 1 0
TM20 TM21 TM23 TM22 TM24 TM25 TM26 –
Address
TM2 F90H
Symbol
TM23
Clears counter and IRQT2 flag when "1" is written. Starts count operation
if bit 2 is set to "1".
Timer start command bit
Operation mode
TM22
0
1
Stops (count value retained)
Count operation
Count operation
Count pulse (CP) select bit
TM26 Count pulse (CP) TM25
0 f
X
/2 1
f X 1 0
0 1
1 f X /2 8 0
f X /2 6
f
X
/2 10
TM24
0
1
0
1
1 1 0
f
X
/2 4 1 1 1
Operation mode select bit
TM21
0 8-bit timer counter mode
Mode TM20
0
Setting prohibited Other