UPD78F9502MA-CAC-A NEC, UPD78F9502MA-CAC-A Datasheet - Page 89
UPD78F9502MA-CAC-A
Manufacturer Part Number
UPD78F9502MA-CAC-A
Description
8BIT MCU, 4K FLASH, 128B RAM, SMD
Manufacturer
NEC
Datasheet
1.UPD78F9502MA-CAC-A.pdf
(229 pages)
Specifications of UPD78F9502MA-CAC-A
Controller Family/series
UPD78F
No. Of I/o's
8
Ram Memory Size
128Byte
Cpu Speed
10MHz
No. Of Timers
2
No. Of Pwm
RoHS Compliant
Core Size
8bit
Program Memory Size
4KB
Oscillator Type
External, Internal
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7.2
Watchdog timer enable
register (WDTE)
The watchdog timer consists of the following hardware.
Remarks 1. f
Configuration of Watchdog Timer
f
RL
f
X
/2
/2
2
4
2. f
Control registers
RL
X
: System clock oscillation frequency
: Low-speed internal oscillation clock oscillation frequency
controller
Clock
input
2
Item
Watchdog timer mode
register (WDTM)
0
Figure 7-1. Block Diagram of Watchdog Timer
counter
Table 7-3. Configuration of Watchdog Timer
16-bit
1
Clear
Preliminary User’s Manual U18681EJ1V0UD
CHAPTER 7 WATCHDOG TIMER
1
Watchdog timer mode register (WDTM)
Watchdog timer enable register (WDTE)
2
2
or
2
2
Internal bus
11
18
13
20
/f
/f
/f
/f
RL
RL
X
X
WDCS4
to
to
Selector
WDCS3
3
WDCS2
WDCS1 WDCS0
Configuration
controller
Output
Internal reset signal
Option byte
(to set “low-speed
internal oscillator cannot be
stopped” or “low-speed
internal oscillator can be
stopped by software”)
89
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