DF38602RFT10 Renesas Electronics America, DF38602RFT10 Datasheet - Page 231
DF38602RFT10
Manufacturer Part Number
DF38602RFT10
Description
MCU 3V 16K 32-QFN
Manufacturer
Renesas Electronics America
Series
H8® H8/300H SLPr
Datasheet
1.DF38602RFT10.pdf
(554 pages)
Specifications of DF38602RFT10
Core Processor
H8/300H
Core Size
16-Bit
Speed
10MHz
Connectivity
I²C, IrDA, SCI, SSU
Peripherals
POR, PWM, WDT
Number Of I /o
13
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 6x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
32-QFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Other names
HD64F38602RFT10
HD64F38602RFT10
HD64F38602RFT10
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF38602RFT10V
Manufacturer:
Renesas Electronics America
Quantity:
135
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11.4.3
When the seconds, minutes, hours, or day-of-week datum is updated while time data is being read,
the data obtained may not be correct, and so the time data must be read again. Figure 11.4 shows
an example in which correct data is not obtained. In this example, since only RSECDR is read
after data update, about 1-minute inconsistency occurs.
To avoid reading in this timing, the following processing must be performed.
1. Check the setting of the BSY bit, and when the BSY bit changes from 1 to 0, read from the
2. When INT in RTCCR1 is cleared to 0 and an interrupt is used, read from the second, minute,
3. Read from the second, minute, hour, and day-of-week registers twice in a row, and if there is
second, minute, hour, and day-of-week registers. When about 62.5 ms is passed after the BSY
bit is set to 1, the registers are updated, and the BSY bit is cleared to 0.
hour, and day-of-week registers after the relevant flag in RTCFLG is set to 1 and the BSY bit
is confirmed to be 0.
When INT in RTCCR1 is set to 1 and an interrupt is used, read from the second, minute, hour,
and day-of-week registers after the relevant flag in RTCFLG is set to 1.
no change in the read data, the read data is used.
Data Reading Procedure
Figure 11.4 Example: Reading of Inaccurate Time Data
Before update
After update
BSY bit = 0
BSY bit -> 1 (under data update)
BSY bit -> 0
(1) Day-of-week data register read
(2) Hour data register read
(3) Minute data register read
(4) Second data register read
RWKDR = H'03, RHDDR = H'13, RMINDR = H'47, RSECDR = H'00
RWKDR = H'03, RHDDR = H'13, RMINDR = H'46, RSECDR = H'59
H'00
H'03
H'13
H'46
Rev. 3.00 May 15, 2007 Page 197 of 518
Section 11 Realtime Clock (RTC)
REJ09B0152-0300
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