DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 1095

• Manufacturer Part Number: DF2148RTE20IV
• Description: MCU 5V 128K I-TEMP,PB-FREE, 100-
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148RTE20IV

• 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: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

TCSR0—Timer Control/Status Register 0
Bit
Initial value
Read/Write
Note: * Only 0 can be written, to clear the flag.
Note: * When OVF is polled and the interval timer interrupt is disabled,
Overflow flag
0
1
R/(W) *
OVF
[Clearing conditions]
• Write 0 in the TME bit
• Read TCSR when OVF = 1 * , then write 0 in OVF
[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.)
7
0
OVF = 1 must be read at least twice.
Timer mode select
WT/IT
R/W
0
1
6
0
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
Timer enable
0
1
TME
R/W
5
0
TCNT is initialized to H'00 and halted
TCNT counts
Reserved bit
RSTS
R/W
4
0
RST/NMI
Reset or NMI
Rev. 4.00 Sep 27, 2006 page 1049 of 1130
0
1
R/W
H'FFA8
3
0
NMI interrupt requested
Internal reset requested
Clock select 2 to 0
CKS2
0
1
Appendix B Internal I/O Registers
CKS2
R/W
2
0
CKS1
0
1
0
1
CKS1
R/W
CKS0
1
0
0
1
0
1
0
1
0
1
REJ09B0327-0400
/2
/64
/128
/512
/2048
/8192
/32768
/131072
CKS0
R/W
Clock
0
0
WDT0