UPD78F0513AGA-GAM-AX Renesas Electronics America, UPD78F0513AGA-GAM-AX Datasheet - Page 399
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UPD78F0513AGA-GAM-AX
Manufacturer Part Number
UPD78F0513AGA-GAM-AX
Description
MCU 8BIT 48-LQFP
Manufacturer
Renesas Electronics America
Series
78K0/Kx2r
Datasheet
1.UPD78F0500MC-5A4-A.pdf
(982 pages)
Specifications of UPD78F0513AGA-GAM-AX
Core Processor
78K/0
Core Size
8-Bit
Speed
20MHz
Connectivity
3-Wire SIO, I²C, LIN, UART/USART
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
41
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UPD78F0513AGA-GAM-AX
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Part Number:
UPD78F0513AGA-GAM-AX
Manufacturer:
NEC
Quantity:
20 000
- Current page: 399 of 982
- Download datasheet (7Mb)
78K0/Kx2
11.4 Operation of Watchdog Timer
11.4.1 Controlling operation of watchdog timer
R01UH0008EJ0401 Rev.4.01
Jul 15, 2010
1.
2.
3.
4.
5.
Cautions 1. The first writing to WDTE after a reset release clears the watchdog timer, if it is made before the
When the watchdog timer is used, its operation is specified by the option byte (0080H).
• Enable counting operation of the watchdog timer by setting bit 4 (WDTON) of the option byte (0080H) to 1 (the
• Set an overflow time by using bits 3 to 1 (WDCS2 to WDCS0) of the option byte (0080H) (for details, see 11.4.2
• Set a window open period by using bits 6 and 5 (WINDOW1 and WINDOW0) of the option byte (0080H) (for
After a reset release, the watchdog timer starts counting.
By writing “ACH” to WDTE after the watchdog timer starts counting and before the overflow time set by the option
byte, the watchdog timer is cleared and starts counting again.
After that, write WDTE the second time or later after a reset release during the window open period. If WDTE is
written during a window close period, an internal reset signal is generated.
If the overflow time expires without “ACH” written to WDTE, an internal reset signal is generated.
A internal reset signal is generated in the following cases.
• If a 1-bit manipulation instruction is executed on the watchdog timer enable register (WDTE)
• If data other than “ACH” is written to WDTE
• If the instruction is fetched from an area not set by the IMS and IXS registers (detection of an invalid check
• If the CPU accesses an area not set by the IMS and IXS registers (excluding FB00H to FFCFH and FFE0H to
counter starts operating after a reset release) (for details, see CHAPTER 26).
and CHAPTER 26).
details, see 11.4.3 and CHAPTER 26).
during a CPU program loop)
FFFFH) by executing a read/write instruction (detection of an abnormal access during a CPU program loop)
WDTON
0
1
2. If the watchdog timer is cleared by writing “ACH” to WDTE, the actual overflow time may be
3. The watchdog timer can be cleared immediately before the count value overflows (FFFFH).
overflow time regardless of the timing of the writing, and the watchdog timer starts counting
again.
different from the overflow time set by the option byte by up to 2/f
Counter operation disabled (counting stopped after reset), illegal access detection operation disabled
Counter operation enabled (counting started after reset), illegal access detection operation enabled
Operation Control of Watchdog Timer Counter/Illegal Access Detection
CHAPTER 11 WATCHDOG TIMER
RL
seconds.
399
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