UPD78F9200MA-CAC-A Renesas Electronics America, UPD78F9200MA-CAC-A Datasheet - Page 152
UPD78F9200MA-CAC-A
Manufacturer Part Number
UPD78F9200MA-CAC-A
Description
MCU 8BIT 1KB FLASH 128B RAM
Manufacturer
Renesas Electronics America
Series
78K0S/Kx1+r
Datasheet
1.UPD78F9200MA-CAC-A.pdf
(342 pages)
Specifications of UPD78F9200MA-CAC-A
Package / Case
*
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Speed
10MHz
Number Of I /o
7
Core Processor
78K0S
Program Memory Type
FLASH
Ram Size
128 x 8
Program Memory Size
1KB (1K x 8)
Data Converters
A/D 4x10b
Oscillator Type
Internal
Peripherals
LVD, POR, PWM, WDT
Core Size
8-Bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Connectivity
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
UPD78F9200MA-CAC-A
Manufacturer:
NEC
Quantity:
20 000
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(2) Watchdog timer enable register (WDTE)
150
Address: FF49H
Symbol
WDTE
Writing ACH to WDTE clears the watchdog timer counter and starts counting again.
This register can be set by an 8-bit memory manipulation instruction.
Reset signal generation sets this register to 9AH.
Cautions 2. After reset is released, WDTM can be written only once by an 8-bit memory
Remarks 1. f
Cautions 1. If a value other than ACH is written to WDTE, an internal reset signal is generated.
7
After reset: 9AH
3. WDTM cannot be set by a 1-bit memory manipulation instruction.
4. When using the flash memory programming by self programming, set the overflow
2. f
3.
4. Figures in parentheses apply to operation at f
2. If a 1-bit memory manipulation instruction is executed for WDTE, an internal reset
3. The value read from WDTE is 9AH (this differs from the written value (ACH)).
Figure 8-3. Format of Watchdog Timer Enable Register (WDTE)
RL
X
manipulation instruction. If writing is attempted a second time, an internal reset
signal is generated. However, at the first write, if “1” and “x” are set for WDCS4 and
WDCS3 respectively and the watchdog timer is stopped, then the internal reset
signal does not occur even if the following are executed.
time for the watchdog timer so that enough overflow time is secured (Example 1-
byte writing: 200 s MIN., 1-block deletion: 10 ms MIN.).
signal is generated.
:
: System clock oscillation frequency
: Low-speed internal oscillation clock oscillation frequency
Second write to WDTM
1-bit memory manipulation instruction to WDTE
Writing of a value other than “ACH” to WDTE
6
Don’t care
R/W
5
CHAPTER 8 WATCHDOG TIMER
User’s Manual U18172EJ3V0UD
4
3
RL
= 480 kHz (MAX.), f
2
1
X
= 10 MHz.
0
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