HD64F7051SFJ20V Renesas Electronics America, HD64F7051SFJ20V Datasheet - Page 331

• Manufacturer Part Number: HD64F7051SFJ20V
• Description: MCU 5V 256K J-TEMP PB-FREE QFP-1
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7050r

Specifications of HD64F7051SFJ20V

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, SCI
• Peripherals: DMA, WDT
• Number Of I /o: 102
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 168-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 10 Advanced Timer Unit (ATU)
OSF Setting Timing in Underflow: When a down-counter (DCNT) counts down from H'0001 to
H'0000 on DCNT input clock input, the OSF bit is set to 1 in the timer status register (TSR) when
the next DCNT input clock pulse is input (when underflow occurs). However, when DCNT is
H'0000, it remains unchanged at H'0000 no matter how many DCNT input clock pulses are input.
The timing in this case is shown in figure 10.33.
CK
DCNT input clock
DCNT
H'0001
H'0000
H'0000
Underflow signal
Interrupt status flag
OSF
Interrupt request signal
OSI
Figure 10.33 OSF Setting Timing in Underflow
Rev. 5.00 Jan 06, 2006 page 309 of 818
REJ09B0273-0500