m3819 Renesas Electronics Corporation., m3819 Datasheet - Page 178

• Manufacturer Part Number: m3819
• Description: Mitsubishi 8-bit Single-chip Microcomputer 740 Family / 38000 Series
• Manufacturer: Renesas Electronics Corporation.

2. APPLICATION
Fig. 2.9.16 Structure of a clock counter
164
f(X
f(X
<at a power failure>
IN
CIN
) = 4.19 MHz
) = 32.768 kHz
Fixed
1/16
Timer 1
Timer 1
1/64
1/8
3819 Group USER’S MANUAL
244 s
244 s
Base counter
When the system recovers
from a power failure, add the
switching process time taken
for the recovery.
Timer 2
2.9 Clock generating circuit
1/256
1/256
Timer 1 interrupt
1 second counter
Timer 3
1/16
1/16
MITSUBISHI MICROCOMPUTER
1 second
Timer 3 interrupt
Minute/Hour/Day/
Month/Year
1 minute counter
3819 Group
Hardware timer
Software timer
1/60