HD6417708SF60V Renesas Electronics America, HD6417708SF60V Datasheet - Page 355
HD6417708SF60V
Manufacturer Part Number
HD6417708SF60V
Description
IC SUPERH MPU ROMLESS 208LQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7700r
Datasheet
1.HD6417708SF60V.pdf
(635 pages)
Specifications of HD6417708SF60V
Core Processor
SH-2
Core Size
32-Bit
Speed
60MHz
Connectivity
EBI/EMI, SCI, SmartCard
Peripherals
POR, WDT
Number Of I /o
8
Program Memory Type
ROMless
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
208-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Ram Size
-
Program Memory Size
-
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6417708SF60V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Part Number:
HD6417708SF60V
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
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12.3.3
Figure 12.3 shows how to read the time. If a carry occurs while reading the time, the correct time
will not be obtained, so it must be read again. Part (a) in figure 12.3 shows the method of reading
the time without using interrupts; part (b) in figure 12.3 shows the method using carry interrupts.
To keep programming simple, method (a) should normally be used.
Reading the Time
Yes
Yes
b. To use interrupts
a.
Clear the carry flag
Clear the carry flag
Disable the carry
To read the time
without using interrupts
Disable the carry
Enable the carry
Carry flag = 1?
Read counter
Read counter
generated?
Interrupt
interrupt
interrupt
register
register
interrupt
No
No
Figure 12.3 Reading the Time
Write 0 to CIE in RCR1
Write 0 to CF in RCR1
Note: Set AF to 1 so that alarm
Read RCR1 and check CF
Write 1 to CIE in RCR1,
and write 0 to CF in RCR1
Note: Set AF in RCR1 to 1 so that
Write 0 to CIE in RCR1
flag is not cleared.
alarm flag is not cleared.
335
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