UPD75238GJ NEC [NEC], UPD75238GJ Datasheet - Page 66

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UPD75238GJ

Manufacturer Part Number
UPD75238GJ
Description
4 BIT SINGLE-CHIP MICROCOMPUTER
Manufacturer
NEC [NEC]
Datasheet
66
Address
FA0H
7
TM06
6
Fig. 4-27 Format of the Timer/Event Counter Mode Register
TM05
5
TM04
4
TM03
3
TM02
2
Operation mode
Timer start specification bit
Count pulse (CP) select bit
(Frequency when f
(Frequency when f
TM06
TM06
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
0
1
1
TM05
TM05
Count operation
Halts (retains
the contents of
counting)
Count
operation
0
0
0
0
1
1
0
0
0
0
1
1
0
TM04
TM04
0
1
0
1
0
1
0
1
0
1
0
1
X
X
Symbol
TM0
= 6.0 MHz)
= 4.19 MHz)
TI0 input rising edge
TI0 input falling edge
f
f
f
f
TI0 input rising edge
TI0 input falling edge
f
f
f
f
Not to be set
Not to be set
X
X
X
X
X
X
X
X
/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)
PD75238

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