HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 236

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Rev. 4.00, 03/04, page 190 of 660
Bit
2
1
0
Bit Name
OVF
OVIE
LMTS
Initial Value
0
0
0
R/W
R/W
R/W
R/W
Description
Refresh Count Overflow Flag
The OVF status flag indicates when the number of
refresh requests indicated in the refresh count
register (RFCR) exceeds the limit set in the LMTS
bit of RTCSR.
0: RFCR has not exceeded the count limit value
1: RFCR has exceeded the count limit value set in
Note: * Contents don't change when 1 is written to
Refresh Count Overflow Interrupt Enable
OVIE selects whether to suppress generation of
interrupt requests by OVF when the OVF bit of
RTCSR is set to 1.
0: Disables interrupt requests from the OVF
1: Enables interrupt requests from the OVF
Refresh Count Overflow Limit Select
Indicates the count limit value to be compared to
the number of refreshes indicated in the refresh
count register (RFCR). When the value RFCR
overflows the value specified by LMTS, the OVF
flag is set.
0: Count limit value is 1024
1: Count limit value is 512
set in LMTS
Clear Conditions: When 0 is written to OVF
LMTS
Set Conditions: When the RFCR value has
exceeded the count limit value set in LMTS*
OVF.