DF2315VTE25 Renesas Electronics America, DF2315VTE25 Datasheet - Page 457
DF2315VTE25
Manufacturer Part Number
DF2315VTE25
Description
MCU 3V 384K 100-TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2300r
Specifications of DF2315VTE25
Core Processor
H8S/2000
Core Size
16-Bit
Speed
25MHz
Connectivity
SCI, SmartCard
Peripherals
POR, PWM, WDT
Number Of I /o
70
Program Memory Size
384KB (384K x 8)
Program Memory Type
FLASH
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
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Manufacturer
Quantity
Price
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Part Number:
DF2315VTE25V
Manufacturer:
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10 000
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Reading TCNT, TCSR, and RSTCSR: These registers are read in the same way as other
registers. The read addresses are H'FFBC for TCSR, H'FFBD for TCNT, and H'FFBF for
RSTCSR.
11.3
11.3.1
To use the WDT as a watchdog timer, set the WT/IT and TME bits to 1. Software must prevent
TCNT overflows by rewriting the TCNT value (normally be writing H'00) before overflow occurs.
This ensures that TCNT does not overflow while the system is operating normally. If TCNT
overflows without being rewritten because of a system crash or other error, the WDTOVF signal *
is output. This is shown in figure 11.4. This WDTOVF signal * can be used to reset the system.
The WDTOVF signal * is output for 132 states when RSTE = 1, and for 130 states when RSTE =
0.
If TCNT overflows when 1 is set in the RSTE bit in RSTCSR, a signal that resets the chip
internally is generated at the same time as the WDTOVF signal * . The internal reset signal is
output for 518 states.
If a reset caused by a signal input to the RES pin occurs at the same time as a reset caused by a
WDT overflow, the RES pin reset has priority and the WOVF bit in RSTCSR is cleared to 0.
Note: * The WDTOVF function is not available in the F-ZTAT versions.
Writing 0 to WOVF bit
Writing to RSTE bit
Operation
Operation in Watchdog Timer Mode
Address: H'FFBE
Address: H'FFBE
Figure 11.3 Writing to RSTCSR
15
15
H'A5
H'5A
Rev.7.00 Feb. 14, 2007 page 423 of 1108
8 7
8 7
Section 11 Watchdog Timer
Write data
H'00
REJ09B0089-0700
0
0
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