UPD75518 NEC, UPD75518 Datasheet - Page 71

• Manufacturer Part Number: UPD75518
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

Address
FA0H
Fig. 4-25 Format of the Timer/Event Counter Mode Register
—
7
TM06
6
TM05
5
Operation mode
Timer start specification bit
Count pulse (CP) select bit
(Frequency when f
(Frequency when f
TM06
TM06
TM04
When “1” is written to this bit, the counter and the IRQT0
flag are cleared. Count operation starts if bit 2 has been
set to 1.
Other setting
Other setting
0
0
1
1
1
1
0
0
1
1
1
1
4
0
1
TM05
TM05
TM03
Count operation
Halts (retains
the contents of
counting)
Count
operation
0
0
0
0
1
1
0
0
0
0
1
1
3
TM04
TM04
TM02
0
1
0
1
0
1
0
1
0
1
0
1
2
X
X
= 6.0 MHz)
= 4.19 MHz)
TI0 input rising edge
TI0 input falling edge
f
f
f
f
Not to be set
TI0 input rising edge
TI0 input falling edge
f
f
f
f
Not to be set
—
X
X
X
X
X
X
X
X
1
/2
/2
/2
/2
/2
/2
/2
/2
10
8
6
4
10
8
6
4
(23.4 kHz)
(93.8 kHz)
(375 kHz)
(16.4 kHz)
(65.5 kHz)
(262 kHz)
(5.86 kHz)
(4.09 kHz)
Count pulse (CP)
Count pulse (CP)
—
0
Symbol
TM0
PD75518(A)
71