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7.2.1.4
This test confirms the operation of RTC using the I2C bus.
RTC test
---------------------
1: data compare test
2: bus integrity test
3: return
select >
With this function, all of the registers in the RTC are read and saved when the test
starts, and then those register values are written again after the test is finished.
7.2.1.4.1
A zero clear verification and a full verification in 0x00 → 0xFF → 0xAA → 0x55
order for a read/write test are performed for all areas of the RTC registers. This is
repeated 10 times.
7
zero clear ... success.
write 0x00 ... success.
write 0xFF ... success.
write 0xAA ... success.
write 0x55 ... success.
.
. (Omitted)
.
zero clear ... success.
write 0x00 ... success.
write 0xFF ... success.
write 0xAA ... success.
write 0x55 ... success.
Error messages
An error message will be displayed for an I2C bus error or an RTC register
read/write error.
(1) I2C bus error
(a) If the I2C bus is busy for 10 seconds when I2C communication starts or
ends
I2C Bus Busy (IBB bit ON)
(b) If I2C is enabled and the bus master cannot operate when the mode is
switched to bus master mode
I2SR arbitration lost
I2SR is 0x000000XX
(c) If data transfer has not completed after 10 seconds while read/write is being
performed
I2C Timeout (IIF bit OFF)
SERVIS IP-Serial
172
1p Converter
User's Guide
RTC test
data compare test
<- Also displays I2C status register content
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