HD6417708RF100A Renesas Electronics America, HD6417708RF100A Datasheet - Page 338

• Manufacturer Part Number: HD6417708RF100A
• Description: IC SUPERH MPU ROMLESS 144LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417708RF100A

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 100MHz
• Connectivity: EBI/EMI, SCI, SmartCard
• Peripherals: POR, WDT
• Number Of I /o: 8
• Program Memory Type: ROMless
• Voltage - Supply (vcc/vdd): 3.15 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Ram Size: -
• Program Memory Size: -
• Data Converters: -

11.5
11.5.1
Synchronization processing is not performed for timer counting during register writes. When
writing to registers, always clear the appropriate start bits for the channel (STR2–STR0) in the
timer start register (TSTR) to halt timer counting.
11.5.2
Synchronization processing is performed for timer counting during register reads. When timer
counting and register read processing are performed simultaneously, the register value before
TCNT counting down (with synchronization processing) is read.
11.5.3
When the RTC (realtime clock) is specified for use as the TMU (timer) clock source in the
SH7708 and SH7708S the procedure shown in the flowchart below should be used to clear the
underflow flag (UNF) in the timer control register (TCR).
318
Usage Notes
Writing to Registers
Reading Registers
Clearing UNF in the TCR Register
Figure 11.10 UNF Flag Clearing
Clear UNF flag
Read UNF flag
UNF = 0?
Yes
No