HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 235

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

Bit
15 to 8
7
6
5
4
3
Bit Name
—
CMF
CMIE
CKS2
CKS1
CKS0
Initial Value
All 0
0
0
0
0
0
R/W
R
R/W
R/W
R/W
R/W
R/W
Description
Reserved
These bits are always read as 0. The write value
should always be 0.
Compare Match Flag
The CMF status flag indicates that the values of
RTCNT and RTCOR match.
0: The values of RTCNT and RTCOR do not
1: The values of RTCNT and RTCOR match.
Note: * Contents don’t change when 1 is written to
Compare Match Interrupt Enable
Enables or disables an interrupt request caused
when the CMF of RTCSR is set to 1. Do not set
this bit to 1 when using auto-refresh.
0: Disables an interrupt request caused by CMF
1: Enables an interrupt request caused by CMF
Clock Select Bits
Select the clock input to RTCNT. The source clock
is the external bus clock (CKIO). The RTCNT
count clock is CKIO divided by the specified ratio.
RTCOR should be set before setting CKS2 to
CKS0.
000: Disables clock input
001: Bus clock (CKIO)/4
010: CKIO/16
011: CKIO/64
100: CKIO/256
101: CKIO/1024
110: CKIO/2048
111: CKIO/4096
match.
Clear condition: When a refresh is performed
After 0 has been written in CMF and RFSH
and RMODE
Set condition: RTCNT
CMF.
Rev. 4.00, 03/04, page 189 of 660
0 (to perform a CBR refresh).
RTCOR *
1