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Section 9 Bus State Controller
Page 286 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
9.4.6 Refresh Timer Counter (RTCNT)
RTCNT is an 8-bit counter that increments using the clock selected by bits CKS[2:0] in RTCSR.
When RTCNT matches RTCOR, RTCNT is cleared to 0. The value in RTCNT returns to 0 after
counting up to 255. When the RTCNT is written, the upper 16 bits of the write data must be
H'A55A to cancel write protection.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
0
0000000000000000
RRRRRRRRRRRRRRRR
0000000000000000
R R R R R R R R R/W R/W R/W R/W R/W R/W R/W R/W
Bit:
Initial value:
R/W:
Bit:
Initial value:
R/W:
----------------
--------
Bit Bit Name
Initial
Value
R/W Description
31 to 8 All 0 R Reserved
These bits are always read as 0.
7 to 0 All 0 R/W 8-Bit Counter