DF2148ATE20 Renesas Electronics America, DF2148ATE20 Datasheet - Page 458
![IC H8S MCU FLASH 128K 100-QFP](/photos/28/61/286108/100-tqfp_sml.jpg)
DF2148ATE20
Manufacturer Part Number
DF2148ATE20
Description
IC H8S MCU FLASH 128K 100-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2100r
Specifications of DF2148ATE20
Core Processor
H8S/2000
Core Size
16-Bit
Speed
20MHz
Connectivity
Host Interface, I²C, IrDA, SCI
Peripherals
POR, PWM, WDT
Number Of I /o
74
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 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
-
Other names
HD64F2148ATE20
HD64F2148ATE20
HD64F2148ATE20
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF2148ATE20IV
Manufacturer:
Renesas Electronics America
Quantity:
135
Company:
Part Number:
DF2148ATE20IV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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Section 14 Watchdog Timer (WDT)
Bit 7—Overflow Flag (OVF): A status flag that indicates that TCNT has overflowed from H'FF
to H'00.
Bit 7
OVF
0
1
Note:
Bit 6—Timer Mode Select (WT/IT IT IT IT): Selects whether the WDT is used as a watchdog timer or
interval timer. If used as an interval timer, the WDT generates an interval timer interrupt request
(WOVI) when TCNT overflows. If used as a watchdog timer, the WDT generates a reset or NMI
interrupt when TCNT overflows. When internal reset is selected in watchdog timer mode, a low-
level signal is output from the RESO pin.
Bit 6
WT/IT IT IT IT
0
1
Bit 5—Timer Enable (TME): Selects whether TCNT runs or is halted.
Bit 5
TME
0
1
Rev. 4.00 Sep 27, 2006 page 412 of 1130
REJ09B0327-0400
* When OVF is polled and the interval timer interrupt is disabled, OVF = 1 must be read
at least twice.
Description
[Clearing conditions]
[Setting condition]
When TCNT overflows (changes from H'FF to H'00)
(When internal reset request generation is selected in watchdog timer mode, OVF is
cleared automatically by the internal reset.)
Description
Interval timer mode: Sends the CPU an interval timer interrupt request (WOVI) when
TCNT overflows
Watchdog timer mode: Generates a reset or NMI interrupt when TCNT overflows
At the same time, a low-level signal is output from the RESO pin (when internal reset
is selected)
Description
TCNT is initialized to H'00 and halted
TCNT counts
Write 0 in the TME bit
Read TCSR when OVF = 1 * , then write 0 in OVF
(Initial value)
(Initial value)
(Initial value)
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